id string | image_1 string | image_2 string | image_3 string | image_4 string | image_5 string | question string | options list | answer string | knowledge-source string | course string |
|---|---|---|---|---|---|---|---|---|---|---|
52032791-1_12 | iVBORw0KGgoAAAANSUhEUgAAAcgAAAClCAIAAABX3vqNAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd1gUV9i3d2b7Ln3pVZoIoiCigootNkSUpqjYu8bYosbEnmI0lqjEjh1UmqKoxIaICiiCCCjSpXfYXdq2OfP9cd53Xz6wgKHqua8ruXB35uyZ2ZnfPvOcp2AkSVIQCAQC0X7gXT0BBAKB+NpAwopAIBDtDBJWBAKBaGeQsCIQCEQ7g4QV0c6QJCmTyUpLS9G6KOKbBQkrov3x9/e/fPlyV88CgegykLD2JKAxuGfP... | null | null | null | null | <image_1>As shown in the figure, one end of the light spring is fixed on the smooth rotating shaft\(O\) on the horizontal plane, and the other end is connected to a small ball (which can be regarded as a particle) with a mass\(m\) set at the smooth fixed straight rod\(A\).\ The height of point (A\) from horizontal is\(... | [
"Kinetic energy of a small ball at\\(C\\) point\\(E_k = mgh\\)",
"The acceleration of the ball when it passes through the\\(B\\) point is\\(\\frac{g}{2}\\)",
"The maximum elastic potential energy of the spring is\\(\\frac{mgh}{2} - \\frac{1}{2}mv^2\\)",
"Conservation of mechanical energy during ball sliding"
... | AB | 力学_机械能及其守恒定律 | phy |
52032791-1_34 | iVBORw0KGgoAAAANSUhEUgAAAX0AAADtCAIAAADcCjLxAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydZ1wT2dfHJ2FS6U06CIigIEXsBcUuUhQLWBFExbr2vta1d0VsiBTRVZodAbFjAQQsgCCK9BY6IW3K82L+y8MScI0GEvB+P3nj5GTmTGR+Offcc88l4TgOAQAAQAdClrQDAADgtwPoDgAA6GiA7gAA/w2LxSoqKkIQpC2D8rKykuLitrIWCIKUFBeXlpZiGNaqAZ/PL8jPZ7FYbZ2By+UW5OXV1ta25QCHwykoKGhs... | null | null | null | null | <image_1>As shown in the figure, tilt angle\(\theta = 37^\circ\) A sufficiently long smooth slope has a mass at the bottom of\(m_A = 1\,\text{kg}\), length is\(L = 4\,\text{m}\), a baffle with the same height and negligible thickness as the thickness of the board is vertically fixed at the bottom of the inclined surfac... | null | \[ Q = \frac{128}{3} \, \text{J} \] | 力学_机械能及其守恒定律 | phy |
51469941-1_13 | iVBORw0KGgoAAAANSUhEUgAAAXEAAADCCAIAAAAwzGWcAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO3dd1gT2d4H8Ex6SOhVqnQQFFwXEbGCgl2xgRUFRdRVFLH3VVDBThFW10UEsSyIrthwFRGwdynSBJQOgTTSZ94/spdXERAVMgmcz3Of+2wmycxPCN/MnHPmHAhBEAwAAEAXwaJdAAAAPQrIFAAAuhIe7QIA9NXW1paUlPD5fLQLwWAwGDKZbGJioqmpiXYhwA8CmQJgnj59GhoaWldXh3YhGAwGo6ent379ejc3N7QL... | null | null | null | null | <image_1>As shown in the figure, the input terminal of the autotransformer is connected to an AC power supply with constant effective voltage. In the figure,\( R_0 \) is a fixed resistance,\( R_1 \) is a sliding rheostat, and the resistance of the lamp does not change with temperature. Which of the following practices ... | [
"Sliding contact\\( P_2 \\) does not move, sliding contact\\( P_1 \\) moves upward",
"Sliding contact\\( P_2 \\) moves upward, sliding contact\\( P_1 \\) does not move",
"While sliding contact\\( P_2 \\) moves upward, let sliding contact\\( P_1 \\) move downward",
"While sliding contact\\( P_2 \\) moves downw... | D | 电磁学_交变电流 | phy |
51370551-1_4-9 | iVBORw0KGgoAAAANSUhEUgAAALQAAADvCAIAAADU5mlRAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dSYxdSVqo/z8izjn33DGHm5MznbbLdrnm0d1ddDWt149uEGzeoqBBbBA0AqRmwQLEuqUGCdSIQWIBUgkQG1YsEEi1QAgaeHp6D6EuqKquKrs85Tzc8cwnIv7/LU6mnVXl63JV2Zk30+eTF3mvT2bGOffLGP6IPwKZGUpK7oY46gKUjC+lHCUjKeUoGUkpR8lISjlKRlLKUTISddQFKPk03DXscDAYIfAB/rZSjjHg... | iVBORw0KGgoAAAANSUhEUgAAAgYAAAEjCAIAAADG1F7vAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOzdd1wTdx8H8N+NbMLeW0BFcYOK4N5YtXWgWKVO3Fq3uFfddWtddW+tde+qxa2oDJUiKorIUGYI2bm754+jyIOjjMBF/b5fz+spt5JPguSbu/sNjGEYBAAAACCEcx0AAACAsYCSAAAAoACUBAAAAAW+2pKgVCrVajVCSK/Xq1QqruMAAMAXAPuCbi/n5OQ8uH9foVAUrrG1ta1Xv75IJPpw53Fjx/7QrZtarT586FC3... | null | null | null | As shown in Figure A<image_1>, semiconductor thin film pressure sensors utilize the "piezoresistive effect" of semiconductor materials. Figure B <image_2>is an image of the resistance\( R \) of a pressure sensor changing with pressure\( F \). The following statement is correct () | [
"The working principle of this sensor is to convert electrical quantities into mechanical quantities",
"As the pressure increases, the resistance of the sensor increases",
"The slope of the curve at a pressure of 1N is approximately 29kΩ/N",
"Sensor sensitivity is greater in an interval less than 1.5N"
] | D | 电磁学_传感器 | phy |
51315810-1_6 | iVBORw0KGgoAAAANSUhEUgAAAPYAAAF3CAIAAAAZ6yFWAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd1wU1/r/p2xflt6RjnRQBFEUBTSKEBUDqFFj1OTGFHNjoilXvzHJzfV6TYzpGk3RGDVqolGDXWwRBRtIkV6kL8sCu8v23Znz++N87/z2S5O2lGXer7zyktnZc87MfubMc55zzvOgAACEhsZ0wYa7ATQ0xoWWOI2JQ0ucxsShJU5j4tASpzFxaInTmDi0xGlMHFriNCYOLXEaE4eWOI2JQ0ucxsRhDLwIAIBer9dq... | iVBORw0KGgoAAAANSUhEUgAAAbsAAADqCAIAAAC0rnyvAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO3dZ0AU19oH8JntVOlFmihNkGZBEVERTPCqWEJMXqO5GqNGcy/GGDugpiCWWBM1RI0tGiMRohCwg4igVMGCNCnS28LCttmZeT9MstmLhWV2afH5fZLZ2WfOjuyfM3POzKAkSSIAAACUwOjrBgAAwIDB6usGAAAQBEEaGhquXLkiEomoH9ls9tSpUwcPHoyiaF83DfwNEhOAfqG8vDw8PLyhoYH6UUdHx8bGZvDgwX3d... | null | null | null | An important technology in the era of new energy vehicles is the kinetic energy recovery system. The principle is as shown in Figure A<image_1>. When the accelerator pedal is released, the car will continue to move forward due to inertia. At this time, the recovery system will let the mechanical group drag the generato... | null | \[x = \frac{M U_C R (n - 1)}{B^3 L^3 + B L R k} + \frac{U_C^2}{2 \mu g B^2 L^2}\] | 电磁学_电磁感应 | phy |
51315810-1_9 | iVBORw0KGgoAAAANSUhEUgAAAdwAAAFPCAIAAABoM+hPAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOzdeXwURd44/qrunvueyX3fB4SEBJBL7vtGQF1XVB50n310Rfd4fFYfH/dZcdfdddf1q791fVwVFVi58UK5w5lAOEIIJCQkIXcydyZzz/RRvz86xJBjZmCRDFJvffFKerq6K1M9n6mu7q4PRAiBewxCCEI43LXAMAwbBDHcFbjTPB5Pe3v7cNcCwzBscPdWUEYIlZaWvvfeez6fb7jrgmEYNoh7KygDAD766KPDhw/X... | iVBORw0KGgoAAAANSUhEUgAAAW0AAAFeCAIAAADBjdl2AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydeXwURfr/q7rnPnJPDsjNEcJ9BFC5RORSDKz4FVZxBUFBdFd3ZRfUlV1gYZF11cXrt+rqirAgCKIcgqJynyEQSAIkQG5C7kwyV8901/P7o2GMSQhJZpKphHq/fPnSTqfzmZ6uT1c99dRTGAAQg8FgeADnawEMBqPDw3yEwWB4isLXAnwMANTU1Bw/frzuQZVKFRkZGRMTo1QqMca+U8dgdAzudB9BCGGMXS7Xxx9/... | null | null | null | An interest group designed a driving model of a maglev train. The simplified principle is shown in Figure A<image_1>. In the\( Oxy \) plane (paper), there is a magnetic field area with width of\( L \) and axis symmetry about\( x \). The magnetic induction intensity is\( B_0 \), and the change rule is as shown in Figure... | null | \frac{R}{4B_0^2L^2} \left[ m \left( v_0 - \frac{fR}{4B_0^2L^2} \right) - ft \right] | 电磁学_电磁感应 | phy |
51315810-1_10 | iVBORw0KGgoAAAANSUhEUgAAAycAAAFcCAIAAABdsVbVAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOzdZ1wU19oA8DOzs42yCyy9CCgggmJviNi70eiNiSUaTTGaxHgxRk00MUZN0USNYkk0amISzU0UW6woKIqCVwVFihQFpElbYPvOzHk/zL28XDUICju77PP/+UF2h91nmdk5z5w55zkExhgBAKxJpQF/kqERCdDnwTYyiuA7HAAAsBYEZF0AWBsji5KqjbYUESajBJB0AQCAqUDWBQAAAABgCiTfAQAAeKBhsJ6FKy4A... | null | null | null | null | <image_1>As shown in the figure, an infinitely long smooth parallel guide rail is composed of metal and insulating parts, with a spacing of\( L = 0.5\,\text{m} \). Two sections of guide rail made of insulating material are embedded in the middle of the metal guide rail\( M \),\( N \)(represented by black entities in th... | null | 0.256J | 电磁学_电磁感应 | phy |
50267661-1_06 | iVBORw0KGgoAAAANSUhEUgAAAS8AAACDCAIAAABTFQquAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAbN0lEQVR4nO3deVwU5eMH8OeZ2dl7YVnuWy5FDhEEUfEKNTw7tDI1U9OsLPWrWZZ527dMS9Pql5nhjXnlgXnfF4qAIogHciOXci2w7M7OzPP7Y4zwqK+Wy84uz/vl6yWvZWEeZuYzzzPP88yzECEEMAwTAMLcBcAw7D6cRgwTCpxGDBMKnEYMEwrRX3+L792BACAAYLNXmoOmKxmGtTZ/UzfCP8IGH3yl+T+TQAidP3euvr7eRL8f... | null | null | null | null | <image_1>As shown in the figure, the $\frac{1}{4}$arc groove $AB$with a radius of $R$and a mass of $3m$is placed at rest on the smooth and horizontal ground. The $B$point at the bottom of the arc groove is tangent to horizontal. There is a small ball 2 with a mass of $3m$at a distance of $R$from the $B$point, and a lig... | [
"Conservation of momentum throughout the system (three objects)",
"When the small ball 1 comes into contact with the spring, it is $\\frac{5}{3}R$from the point $B$at the bottom of the arc groove",
"The maximum value of spring elastic potential energy is $\\frac{9}{16}mgR$",
"The final speed of small ball 1 i... | BC | 力学_动量及其守恒定律 | phy |
49418810-1_6 | iVBORw0KGgoAAAANSUhEUgAAAS4AAADeCAIAAAAMx3q5AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO3dZ1wURx8H8G1X4QBpSrVQFMXeTbH3biyxJVET42OJscUSNSZqNBbsvXeNLbHEJBZiiyh2RLBgAZQO1++2zTwvNhIkikqRFf7fF/nEvdu52eN+O7uzs7MkxpgAABQ3qrgrAAAgIIoAyAVEEQBZgCgCIAsQRQBkAaIIgCxAFAGQBYjiG+N57vrVK2fCT8ElWVCIIIpvBmOcmZE5dcK4wwcPFHddQIkCUXwzPM9HnD+X... | iVBORw0KGgoAAAANSUhEUgAAAOMAAADeCAIAAABACCBoAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2ddVwWyR/HdzaeokNpkJaSFluxu7v1PLvr9NSzPbvj1LPjsLux4wwUkRALEJGG5wGe2mfr98fqc0ip8ADP82PfL/+Q3ZnZ2X0+O/ud78x8BzAMA3FwaD1wdVeAg+OH4JTKoRvUIKXSNJ2TnS2VFlAUVd114fhpaopSaZqOeRU1qFf32zduVHddOMpDDVLqyX+OkiTVoHETGK4pd/3/RI34zWiaTv2ccvnC+RatWhkY... | iVBORw0KGgoAAAANSUhEUgAAAOwAAADYCAIAAABnWpj4AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2ddVwVWRvHJ28H3WAgICYqdneBubZirN2Krq65oe6u7muL3R27dncXJipICtINtyfOef8YvYvUinKB68734x8yc86ZM3N/c+bE8zwHhRAi/zHUKtXsaVPCXr8+fuGS0sICRdHyrhHPV4GVdwXKGpZlkxITngUHjxw7TqFU8gr+BqjQIqYoSqfVlm6ZOp1u1fI/EAT69eqN8Qr+JqjQIg5+9GDn1i0MwxSVAELIMAxN... | null | null | As shown in figure a<image_1>, there are two wave sources,$S_1$and $S_2$, in the xOy plane, located at $x_1 =-0.2 $m and $x_2 = 1.2$ m respectively. The vibration direction is in the xOy plane and perpendicular to the x axis. The vibration images of $S_1$and $S_2$are as shown in figures b <image_2>and c respectively<im... | [
"At $t = 0.2$ s, the particle at $x = 0.2$ m begins to vibrate and the direction is in the negative direction of the y-axis",
"At $t = 0.4$ s, the particle displacement at $x = 0.6$ m is 40 cm",
"The particle at $x = 0.7$ m is always in equilibrium position",
"After $t = 0.5$ s, the particle amplitude at $x =... | D | 力学_机械振动与机械波 | phy |
49418810-1_18 | iVBORw0KGgoAAAANSUhEUgAAAXkAAAC2CAIAAACzqGq/AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydZ1hVRxOAT7+VDiqgSBcpgtgLimJvqKixxR4TjVFTbIm9xxZ77xp7TQR7BUEFrKiIKCi9c/s9bff7cQwfwQaXIpr7Pv5Ilnv27GmzszOzMyiEEDHyOcPzfEFBQfv27T09Pbdv3y6Xyz/1iIwYeQfYpx6AkX8BAAAAlGiEEAIA3jcrsCwbHR2dlpY2dOhQsVgs/J7neZ7nSxwCIRS6KuqtxP8W/Yzn+beHYcRIeUCN... | null | null | null | null | <image_1>As shown in the figure, two simple harmonic shear waves A and B propagate in the same medium along the positive and negative directions of the x-axis respectively, and the wave speeds are both 0.5 m/s. The waveform curves of the two waves at $t = 0$are as shown in the figure. The following statement is correct... | [
"The vibration period of the first wave is 0.5 s",
"At $t = 0$, the displacement of the particle at coordinate $x = 300$ cm is 16 cm",
"At the moment of $t = 0$, there is no particle displaced by-16 cm from the equilibrium position",
"$t = 0.1$ s, the earliest particle with a displacement of-16 cm from the eq... | C | 力学_机械振动与机械波 | phy |
49418810-1_25 | iVBORw0KGgoAAAANSUhEUgAAAqsAAADPCAIAAABdgw/DAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOy9d5Aj2X3n+RJAIuG99wWUry7b3k7PsOmGM+SIXAZFnnTUKaSVqJNuFdTdxUl7G7FxRqvbU8RJJ2lPVGhJrZa7ohE5NMPhcLzpZtuq7uoujyqYgrcJl0hkJjLz/ngcTLGnp6e6GyjX7/PHxETh9fu9h0xkft/vvd/vh4miCBD7losXL/7d3/3dRz7ykS9/+cu7PRYEAoFA7Cdkuz0AxEMiiqIgCNVqNRKJDA0Nlctl... | null | null | null | null | The two columns of simple harmonics travel opposite each other along the x-axis, with wave speeds of both $v = 0.4$ m/s and amplitudes of both $A = 2$ cm. The two wave sources are located at $A$and $B$respectively, and the waveform when $t = 0$is shown in the figure<image_1>.$ The abscissa of the two particles M$and $N... | null | The displacements of M and N are-2 cm and-(2 + \sqrt{2}) cm respectively. | 力学_机械振动与机械波 | phy |
49418810-1_38 | null | null | null | null | null | A series of simple harmonic shear waves propagates along the x-axis. At a certain moment, points A and B on the x-axis that are separated from S are in equilibrium positions, and there is only one wave peak between A and B. After t time, particle B reaches the wave peak. Try to calculate the propagation speed of this w... | null | When the wave propagates to the right,$v_1 = \frac{\lambda}{T} = \frac{S}{6t}$($4n+3$); when the wave propagates to the left,$v_2 = \frac{\lambda}{T} = \frac{S}{6t}$($4n+1$), where $n = 0, 1, 2, \cdots$; | 力学_机械振动与机械波 | phy |
49831267-1_1-9 | iVBORw0KGgoAAAANSUhEUgAAAe4AAAC3CAIAAABbgyqKAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd3wVxfbAz8zu3p6bm95JSAAJAQRpItUCIoIClqdPREFQsVdA4FGV/vNZQIWnPsEnCAqIUiRIUZoIGDoJkJCQhPSe23Z35vz+2OQSARFJo9zvxwJ7d2fOzs6ePXPmzBmCiODFixcvXq5laGML4MWLFy9eaotXlXvx4sXLNY9XlXvx4sXLNY9XlXvx4sXLNY9XlXvx4sXLNY9XlXvx4sXLNY9XlXvx4sXLNY9XlXu5... | iVBORw0KGgoAAAANSUhEUgAAARYAAADOCAIAAAB0NbruAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2deXwV1dn4n+ecmbvlZl/IBgQMJAbCKosIiAoUFUQL7kutUt9aLeVnW22rFd/XpaLUtS24C2pFcBcFEQRl3xHZZA0xGyEJ2e42M+c8vz8mucYQMIE7AWS+Hz+Ye+7MnDNzzzPnnOc8CxIR2NjYnCjsVDfAxubMxhYhG5uTwhYhG5uTwioROs4S6ydXX+EDpJSGYRQXFzc9hYiaXeH4H21sLEWx4qJCiLq6upiYGMaa... | iVBORw0KGgoAAAANSUhEUgAAASUAAADUCAIAAABVvKIoAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2deXwW1dX4z7kz8yzZ94RshEA2EgIIJBGRXQJBoSwVtL4qrm19a22rv9pWpFbq0k/74o5WERdwAaEKiGUTDMgiYQt7IJCEJGTfk2eZmXt+f0x4iA8BY3iehxjm+/EjmXnuzL2znDn3nnvuOUhEoKOj4xHYtW6Ajs51hC5vOjqeQ5c3HR3Pocubjo7n0OVNR8dz9Dh5U1WVc97pT5xzzjldQNsEACJqaGjIzc0tKytz... | iVBORw0KGgoAAAANSUhEUgAAARAAAADOCAIAAAB5K8qpAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd3wVVdr4n+fMzK1pNz0kQBIICTWhJRgEBBRYELArLGthLauudde16yvisj9Z1JVtrrruwoouRaQIFpoLIgGEGAgloUNCerv9zsx5fn8M3jdvSELLXMI6308+H2UyM+fMZJ5TnopEBAYGBucHu9wdMDC4kjAExsDgAjAExsDgAtBRYIhI2yCd5zaJiPx+P+e81V+1c9WlddPA4AIQ9bs159zn81VXV/v9/uBBRBQE... | iVBORw0KGgoAAAANSUhEUgAAAREAAADJCAIAAACL7JEvAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOy9eZxU1Znw/zznnHtv7dXV+0KzNKuyg4qyuIOixn0f9U1+mdffJEbNOMkkmSXRSWJIIlkmk+hMjEomcca4oDEicUMjLkAQBQHZpIGG3ruruta7nPO8f9zqpmlQGugqUe5XPn66q+7y3NvnOctzngWJCDw8PAYN+6QF8PD4lOHpjIfHkeHpjIfHkeHpjIfHkeHpjIfHkeHpjIfHkSE+kbsSUZ+NGxHdnxEREfsfY1lW... | <image_1>As shown in Figure A, there is a magnetic field perpendicular to the plane of the coil inside the circular coil. The known coil area is $0.5 $m$^2 $, the number of coil turns is $n = 20$, and the total resistance of the coil is $r = 2 \Omega$. The change of magnetic induction strength in the coil over time is ... | [
"<image_2>",
"<image_3>",
"<image_4>",
"<image_5>"
] | AD | 电磁学_恒定电流 | phy |
49831267-1_14 | iVBORw0KGgoAAAANSUhEUgAAAgEAAACMCAIAAABqNe0ZAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd1gUV/f4Z2b7sssuu/ReFhAQEEQExELRYEMl9p5oorHFxG+isfsaTV5jjSaxa2ISNbZYsDeKglQBQXrvdRe2l7m/P+b97curSHal7ALzefLkwdkpZ2bu3HPuueeeAwMAIBwcHBycAQmiawFwcHBwcHQGrgNwcHBwBi64DsDBwcEZuOA6AAcHB2fggusAHBwcnIELrgNwcHBwBi64DsDBwcEZuOA6AAcHB2fggusA... | null | null | null | null | <image_1>The circuit used by a student to study long-distance transmission is shown in the figure. Terminals a and b are connected to an AC power supply with a voltage effective value of $U_0$. The step-up transformer $T_1$and the step-down transformer $T_2$are both ideal transformers, and the turns ratio of the two tr... | [
"Boost transformer $T_1$turns ratio of coil $\\frac{n_1}{n_2} = \\frac{1}{2}$",
"The voltage meter shows $\\frac{3}{4}U_0$",
"The current meter shows $\\frac{3U_0}{4R_0}$",
"If $R_3$is disconnected, the ammeter number will increase"
] | BC | 电磁学_恒定电流 | phy |
52262069-1_3 | iVBORw0KGgoAAAANSUhEUgAAAPUAAAFiCAIAAAChxwl9AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOy9Z5Rc13Umuvc5N1Wuzjkh50BSAEGCOYiUqGjmJ0uyZVlymPHM8rxZnmc/j+1Z47Hl5zTLSbJEjURRJEWKFHMCA0iCYASInLoRGp1zd3Wle+85+/0491ZXg50AVAFoEN/qRTa6u246++6z47dREsElXMKFC0IgAAkgAASABEAAANKBDAAgAmDezz4J7Rxf7CVcwmkBAYEQCEEiSAYggREwAGQAIAEIAKcVb8BL+vsS... | null | null | null | null | <image_1>As shown in the figure, glass bottles A and B contain hot water and cold water with equal mass and a temperature of 60℃ respectively. The following statement is incorrect () | [
"Because the masses are equal, the internal energy of water in bottle A is greater than that in bottle B.",
"The average distance between water molecules in bottle A is smaller than that in bottle B",
"If you put the two glass bottles A and B together, the internal energy of the water in bottles A and B will ch... | B | 热学_分子动理论 | phy |
52262069-1_4-2 | iVBORw0KGgoAAAANSUhEUgAAATIAAAEECAIAAAAkhy8iAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd3gVVfr4Z27JrUluCimQTgqkQQglQEILoYs0KepaWMV1Bevuquuu7u5XwFV3fz6KiAguyKIYFgTpNbQACaQQ0vtNcnN7L3PvtPP7YyBGSjgT0oD5PHkeJZl33nfOzHvOmTPnfV+UBgDh4Hg0QBEEIAiNABqhEASgCI+H8JhfAwRhfoP2t5EIgvD62wAODo5b4dySg2PAIehvAzg4+hCAIAiCor/8i/71nwEC+Ej/... | null | null | null | null | In the experiment, 1 mL of pure oleic acid was prepared into 5000 mL of oleic acid alcohol solution. Using a syringe, 1 mL of mixed solution was measured to be 80 drops. Take 1 drop of such solution into a prepared tray and place it on the glass cover plate. The outline of the oil film drawn on the cover plate is as <i... | null | 7 \times 10^{-10} | 热学_分子动理论 | phy |
52291989-1_2-3 | iVBORw0KGgoAAAANSUhEUgAAAEgAAAEfCAIAAABtcxfrAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAJjElEQVR4nO2dXUgU3RvAd2b228/cddVUtMA0TJBIhLWEslKot5suqoso6zIjMlTwwo/KLgwKKxJRgiAr6KIu6sLKqFCLEDMvWlpMJfODbHfd1d2Z3fk4/4sBkd63/XD17zzy/O52d+ac89tn5pyZM2fOoQghqo0Ivd4FWCtQDBooBg0UgwaKQWPDiqnD39Tr9bpcrkAgsCoZGwyGhIQEg8FAUdSqJPgH4YoRQvr6+i5evDg/P78q... | null | null | null | null | <image_1>The picture shows a vertically placed closed thin tube with a thick upper part and a thin lower part. The mercury column divides the ideal gas into two parts A and B, with the same initial temperature. After raising A and B to the same temperature and stabilizing, the corresponding volume changes are $\Delta V... | [
"$\\Delta V_A < \\Delta V_B$",
"$\\Delta F_A = \\Delta F_B$",
"$\\Delta p_A > \\Delta p_B$",
"The column of mercury moved up a certain distance"
] | CD | 热学_气体、固体和液体 | phy |
51123608-1_2 | iVBORw0KGgoAAAANSUhEUgAAAcIAAADJCAIAAAA/yqVlAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOyddXQUVxuH7x1b381u3AVLKMWDOxQr2uIt7k5xdylSoMVpKdICLRRogeJuwV2CJSQh7pvV2Zl7vz82SaEFmq8k2dkwz+np4eRskncyc3/z3vsaxBgDEREREZH/CuFoA0REREScG1FGRURERN4LUUZFRERE3gtRRkVERETeC+qNX8UYIwwQxiQBCQjf9hkAAAaA5bGEhPAtHxM4CGMeYQghBQF455WyPKZJCAFwuivF... | null | null | null | null | <image_1>As shown in the figure, a heating wire with a resistance of $R = 9\Omega $is fixed to the side wall of an insulating rectangular box. The total volume of the box is $V = 2\times 10^{-3}$ m$There is a piston regardless of mass in the box, regardless of friction with the inner wall of the box. A certain mass of ... | null | \frac{700}{27} \text{s} | 热学_热力学定律 | phy |
52288214-1_1-15 | iVBORw0KGgoAAAANSUhEUgAAANoAAADzCAIAAABv3J9yAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO29d5xkV3UgfM65r6q6e6YnarKkUc4oICGEJIPgA8kmWDJIMp8D8gImaOUFe9c/CePf8mE54YxZYa8F1nqN0NoYI/Biy7u2kUGAZBgwSqNBYRQmaGL3zPR0qPfuOd8fN7x733tVXd1VNdMj1aEZVb164b57zz05oIjAAAawMICO9gAGMIAcBug4gAUEA3QcwAKCAToOYAHBAB0HsIBggI4DWEAwQMcBLCAYoOMAFhAM... | iVBORw0KGgoAAAANSUhEUgAAAKEAAADgCAIAAADkN5EoAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAaq0lEQVR4nO2deVwTZ97An7lykYQzHAEFBA9EseBVFAu11q5Xay1a1LZ0P2qtSt+2b621Xa1ra93W9ahdr6211R5oV1E/Hq+IFdyitFqsooIil0FuEgg5SDLJzLx/RCmFgECSSUie719kMscTvvPcM78HYRgGQFwa1NEJgNgd6Nj1gY5dH+jY9emdY4qi7JYSiL3oneO//e1vJEnaLTEQu9ALx2q1+siRIzk5OfZMD8T29MJxRkZG... | null | null | null | A certain group designed a simple depth gauge, as <image_1>shown in the figure. It is constructed as a rigid cylindrical container with good thermal conductivity. There is a bayonet at the top. A thin piston with negligible mass is used to seal part of the ideal gas. The piston and the container wall can slide without ... | null | 9 \times 10^4 \text{J} | 热学_热力学定律 | phy |
52291990-1_1-34 | iVBORw0KGgoAAAANSUhEUgAAAMUAAAC6CAIAAACRLh6zAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOy9Z5Be2Xnn9zzn3Pjm2Dl3IzZymBkAkzmR4gwpkaZES6SssFp7Ldkf7Q+2S+VSuaTdtbWWq7a25FWgRIqmRIocUZwhOZyMSRhgkFOj0Tm+Od14kj/cHpDSMgscADP9KxSqC93oPrj3j3Oe80RUSsEmm9wkyK1ewCYfKDb1tMnNZFNPm9xMNvW0yc1kU0+b3Ew29bTJzWRTT5vcTDb1tMnNZFNPm9xMbjs9iVrDn1vk... | iVBORw0KGgoAAAANSUhEUgAAAWcAAADwCAIAAABTzjKVAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOyddVxU2dvA750Zuru7u7u7BVFAMbC7u9dY27VbUFEB6e7uRqRLujtnmLr3/WP25eeqqOsqAzjfz/6zl3Pufc713GfOec4TIAzDAAUKFCh8xmzKATHnklCgQGFhgyK3AD8N7PR0U2MjEomUlZcntywUKCxmFs9ao6mxcd/2LZGhwQBly0WBwq9k8WiNjNQkPA5n7+QMgOQWhQKFRc0i0Rp4PM7P19fQxFRcUpLcslCg... | null | null | null | Picture A <image_1>shows a pneumatic shock absorber for a mountain bike, which is mainly composed of a piston, a cylinder and a spring. A research team took it out for research. As shown in Figure B<image_2>, place the heat-conducting cylinder B with piston A on a smooth inclined surface with an inclination angle of $\... | null | 0.2 | 热学_热力学定律 | phy |
51382019-1_1-1 | iVBORw0KGgoAAAANSUhEUgAAAVUAAAB1CAIAAABxteX7AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd3xT1fvHc1duRjPapE33AspsoaWMlqmoCMgXxO9Pv4oDRXCBgCB7ygYRERDFhbJUEBwgQ5bwZRQqu7YFSilt0zZt9rjJHef8/riQbyjDUlI6ct/44vXyJtx7kpzPOc/znOc8B4EQigQEBAIStL4bICAgUG8I+hcQCFwE/QsIBC6C/gUEAhdB/wICgYugfwGBwEXQv4BA4CLoX0AgcBH0LyAQuAj6FxAIXAT9CwgE... | null | null | null | null | Hold the string and make point A on the rope drive each point on the rope to make a simple harmonic motion up and down from time t=0, with an amplitude of 0.2m. When t=0.4s, point B just starts to vibrate, and point A returns to its equilibrium position. The waveform formed on the rope is as <image_1>shown in the figur... | null | 5.2m | 力学_机械振动与机械波 | phy |
51382019-1_1-4 | iVBORw0KGgoAAAANSUhEUgAAAVYAAAB4CAIAAAAmHE0mAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd3hURdfA79y7PT2B9LbpvRMSIPQqINKVJtJBQapIL1IEEREBBZQmKEhVkN4DoYdQ0kiAQEhPNpts33tn5vvjJstmNyToa/mI9/fwvI9vdnb23LkzZ87MnHMGYIwJDg6O/yrkvy0ABwfHvwmv4Y8hQpBhSABIigIAAAD+KcE4ODj+CRqxAhiavnL54s+7d8lkFQihf0oqDg6Of4hGrABaT+/dtSsl+dKNaylLV662... | null | null | null | null | <image_1>The spring vibrator makes simple harmonic motion between points B and C with point O as its balance position. The distance between B and C is 20 cm. At a certain moment, the vibrator is at point B. After 0.5 s, the vibrator reaches point C for the first time. Find: The distance traveled by the vibrator in 5 s ... | null | 2m, 0 | 力学_机械振动与机械波 | phy |
51382019-1_2-1 | iVBORw0KGgoAAAANSUhEUgAAARcAAAFJCAIAAAA+Nf4EAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydeVxM6//A55zZm6ZF+x6R7GvKnkibvRQqhNKihdxs3Uikr0sklCyVInKThJJkzZJdruxL0qpF0yzNnOX3x3O/59e3slxqmtzz/sMrM2fOPOfM+TzP5/msEI7jFBISkp8A7uwBkJB0eUgpIiH5WUgpIiH5WUgpIiH5WWidPYAuD4ZhOI7jOA5BEAzDEAS1OADHcQzDKBQKOKCThknSgZBS9OMA8Xj79m1BQUFtba2a... | null | null | null | null | <image_1>As shown in the figure, the light source $S$is located at the bottom of the container containing a certain liquid. A flat mirror $MN$is fixed to the inner wall on the right side of the container. The upper end of the flat mirror is flush with the top of the container, and the lower end is flush with the liquid... | null | 2.2 \times 10^{-8} \, \text{s} | 光学_光的折射与反射 | phy |
51382019-1_2-2 | iVBORw0KGgoAAAANSUhEUgAAAL0AAAB+CAIAAAD+yYd9AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO1deXyTRfqfmffI2bRJmqQ3hVJ6AC21IKcgl4AHuByyXuDq6upS13NlhZ8sKqIgoICLrIqsCogILOLKysotIJeAlKulpXdLk6Zp05zvMfP7Y0osBUpbWmix3z/6SZN5553jO88888wzz0BCCOhAB5oIdLML0IF2iQ7edKA56OBNB5qDDt50oDno4E0HmoMO3nSgOejgzW8Ofr+/oKDA4/FcjwmmgzdXAKmDm12WlkdW... | null | null | null | null | With the continuous development of monitoring technology, surveillance cameras and other equipment are now installed in streets and alleys and every household. <image_1>As shown in the figure, a hemispherical transparent material with a radius of $R$is removed from a monitoring device. The center ball is a $O$point, an... | null | \frac{3R}{c} | 光学_光的折射与反射 | phy |
51382019-1_3-7 | iVBORw0KGgoAAAANSUhEUgAAAfsAAACqCAIAAAAlTHFjAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAakklEQVR4nO3df1xUVf4/8HvunZ/MDD8FdVBZ8ndiaVSs6aPNVCwfyPojQ5LVVldzHx/L32lqVqaLiaKuFv7s80lMzVUTQdfEthRlzVwFtRWBQPmCigzIz2HuzL3nfP+420hAWxCD4Lyef+HcmTnHf173zPucew5hjHEAAOAG+AfdAQAAaCVIfAAAd4HEBwBwF0h8AAB3gcQHAHAXSHwAAHeBxAcAcBdIfAAAd4HEBwBwF0h8AAB3... | null | null | null | null | <image_1>As shown in the figure, the rectangle $ABCD$is the cross-section of a transparent optical element, the side length of $AB$is $L$, and $O$is the midpoint of the side of $AB$. A thin beam of monochromatic light enters the optical element from the point $O$, with the angle of incidence $\alpha = 45^\circ$. The li... | null | \frac{3\sqrt{2}NL}{c} \quad (N=1,2,3,4\cdots) | 光学_光的折射与反射 | phy |
51382019-1_3-13 | iVBORw0KGgoAAAANSUhEUgAAASAAAAEFCAIAAADMgK1SAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd2AUxRfHZ3b3+l1yufQeIKGFkNBD76E3RQEFRWlSRERAEMQgvTfpIiCC9F6lSMeEkhBCKgHSSe9Xd2d+fyzE/ACVcrmSzOcPNHeb28ntfOfNvHnzHsQYAwKBUDkw5m6AmcEY80MMRVHmbguhClLdexXHcadPHEt+8ohYckJlUN0FVlRYMHfWzEP79gFABEYwPtVdYA/u39do1AGBQeZuCKFqUn3XYPyc8E54mFgs... | null | null | null | null | The cross-section of an optical component is as <image_1>shown in the figure. The center of the semicircular glass brick is the point $O $, and the radius is $R$; the extension line of the $FG$side of the right-angled prism passes through the point $O$, the $EG$side is parallel to the $AB$side and has a length equal to... | null | 0< x \leq \frac{2\sqrt{3}}{9}R | 光学_光的折射与反射 | phy |
51800028-1_7 | iVBORw0KGgoAAAANSUhEUgAAAaQAAAEvCAIAAACFWSJ5AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO3dd0ATSd8H8NkUEggl9F5FAVFAQQWxYgFExK4geHrW14K9n57t9PT0vLPg6VnwbCeCYjmfR09EsVdEqiAIiID0AAmQtu8fKzEPzZAEBff3+Su7mZmdDPBls2UWw3EcAQCAXGpqaioqKlBTMUKn09na2jQaTbKmksMpKCjoYmeHYVjj8pyKCh6PJ1nUYrPV1NSI1yKRqOjDB+I1lUYzMDCQo6s0GcoAAEDTqqurH9y/... | null | null | null | null | <image_1>The energy of the ground state of the hydrogen atom is $E_1 = -13.6 \, \text{eV}$. A large number of hydrogen atoms are in an excited state. Among all the photons that may be emitted by these hydrogen atoms, the photon with the highest frequency has the energy of $-0.9375E_1$. From the perspective of Bohr's at... | [
"These hydrogen atoms may emit photons with an energy of $0.64 \\, \\text{eV}$",
"These hydrogen atoms can emit photons of up to 6 different frequencies",
"Irradiating the hydrogen atom with electromagnetic waves at $3.3 \\times 10^{13} \\, \\text{Hz}$can ionize the hydrogen atom in the ground state",
"After ... | BC | 近代物理_原子结构 | phy |
50444808-1_14 | iVBORw0KGgoAAAANSUhEUgAAAV8AAADvCAIAAADaakAXAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOxdd3wUxdt/Zvb6Jbm7FFIpCWkk0kLvHaT+AAErRbEjFhQV5LUioCCC2EBQpIMKIl06KCVAKIEkBEJ6z6Vcru/uzPvHXI4jCRHpwft++JC92ZnZmd2Z78w888zzIEopuOGGG27UAL7XBXDDDTfuU7jZwQ033KgdbnZwww03aoebHdxww43a4WYHN9xwo3a42cGNfwFK6b/d5KKUVlZWFhQU3LFCuXGn4GYHN/4FBEE4... | iVBORw0KGgoAAAANSUhEUgAAAaQAAADqCAIAAABiC6bKAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydeUAU5fvA33f2Priv5VKQU0RR8b5RETGPMk0r07w1s7S00jSxDLP8eaR5ZOaRlWaaiqbmfQsqqJwCci/Xsssu7D0z7/v7Y4oQdpcFUfrWfv7QZeaded+Z3Xnmed7neCHGGNiwYcPGvx2irQdgw4YNG88Dm7BrmqtXr9bU1LTW2aqrq+/fvy+Xy1vrhDZs2LAGm7BrmosXL8bHx9fW1lpos3XrVoqi6v48ceIEIx81... | null | null | null | The schematic diagram of the working principle of a medical cyclotron is shown in Figure A<image_1>. Its working principle is: under the action of the magnetic field and the alternating electric field, charged particles repeatedly perform cyclotron motions in the magnetic field, and are repeatedly accelerated by the al... | [
"The accelerated particles are positively charged",
"The magnetic induction intensity of the uniform magnetic field between the magnets is $\\frac{\\pi}{2kt_0}$",
"The maximum momentum of the particle being accelerated is independent of the radius of the $D$box",
"the numb of times a charged particle is accel... | BD | 电磁学_静电场 | phy |
50444808-1_35 | iVBORw0KGgoAAAANSUhEUgAAANsAAAC3CAIAAAAU17w2AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO19d1xUx/c223tnYZfeRFBAQLABKthRMajBWLCXqDHGjsYSfkmM3Rg1iT0aCxrFqLGBNdhiBxSBVem9bi+37PvHvNnvZoFlWVDaPn/40evM3Ll3n3vmzJlTMFqt1soCC9oMsK09AQss+A8sjLSgbcHCSAvaFvCtPYHWhFarRVEURVGtVovD4bBYLAaDsbKyQhAERVEMBoPHd+r30yro1DJSrVYfOHDgyy+/DAsL27dv... | iVBORw0KGgoAAAANSUhEUgAAAK0AAACBCAIAAAA9o61ZAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAPHklEQVR4nO2deVRTVx6A33sJiwSIhSAga5N61EDKIFrRw9JRRyGo4HigLmOlPczx9EhdmAod7WlFUUHBpWVTj86wTBE3RoEORUUw0lPBUs4ZPbKEBJBChECRJcEk797549GUEQlbAiTc768Y70su73753f1dHEKIIWY9xHRnADEjoOvoc9VhBsdxHX0FQovoKh4AAMrKytra2jQngxACAEiSBAAMfUelUgEAUJ01ZejEAwihXC4/... | iVBORw0KGgoAAAANSUhEUgAAAJwAAAB4CAIAAACIDwyOAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAQvElEQVR4nO2deVwUR77A6e65EZiA4GA0gJCR44OgQREFiSgKiHhA4Hlt1BjxxSu7MZqHGiFssusTjXH1kzyNJkZAXRE88amIKHJ4sMphFGFQREAyTBhhmKu7qt8fvcv6YFSE6Zmh7e9ffGaaqpr+dh39q+pqhCRJKxZmgZq7ACzGh5XKQGiUSpIkhJC+9FleBI1SNRpNTk6OWq022G0DAHQ6nUqlUiqVOI5TH5Ik2d7erlQq2auh... | iVBORw0KGgoAAAANSUhEUgAAAKsAAACHCAIAAADm5D4DAAAACXBIWXMAAA7EAAAOxAGVKw4bAAASmUlEQVR4nO2deVRT177Hc05CgIwktoooKNiCdBABGRxqFQWrImJpRVvrE3kq2nVj7b121fZpaS36dNHapVRdvVonBrU48azIq60T1lILaEtBRpmKCGEIJCE5w97vj92by4MCUThkOOfzh0tOzrCT/T3fPf323hiEkMfBYnBLJ4DDwnAKYDucAtgOpwC2wymA7QgsnYA/QU2S/hsmGIZhGDaMiWIFVqQA8C965DSSBYZhfD6fz+db... | iVBORw0KGgoAAAANSUhEUgAAALEAAAB+CAIAAADk9WfzAAAACXBIWXMAAA7EAAAOxAGVKw4bAAATk0lEQVR4nO2de1hTR/rHOScnFwi5EMAAERFZwLWgVWBFtgtYkHtBy8/Wsvy8tCjFegPbx1brpS10pVVsrVpEC1qtPo8o2nqhhSqKYKkVVC4FFRExAglEhAC5nNvvj7PLj40QQBOSwHz+8gnvM86Z8z3vvDPzzgxEkqQZANAP2NAVABgdQBMATYAmAJoATQA0AZoAaIIYugJmBEFgGEYQxGAGNBqNRqPBMJDvKGF4TTQ0NJw/f76k... | <image_1>As shown in the figure, there are uniform magnetic fields and uniform strong electric fields in space. The magnetic field direction is perpendicular to the paper and inward, and the electric field direction is along the negative y-axis. At t=0$, positively charged particles enter the electromagnetic field from... | [
"<image_2>",
"<image_3>",
"<image_4>",
"<image_5>"
] | BD | 电磁学_静电场 | phy |
50013457-1_6 | iVBORw0KGgoAAAANSUhEUgAAAVAAAAEFCAIAAAA6ySjKAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO3deXhU1f0/8HPuvbNklkxWEhIzSQxFkQBPElYRwxIlAQQMCLT42FJspfVrC1WRb/m1arVW+1j8Pg9WrUoLyGPFFopFQJYAEgJhEVDIwhogC1nIJLNk9nvO748zM5mEgJCE2e7n1ac4ueuZ5X3vufecey+mlCKEEGL/+sM3DAEAhDfB+wLiDUDkE24cRCk1mUwWi0UUxWAUCQDw/ZRKZVxcnCD0EOFb6Hnqy5cvL1q0... | null | null | null | null | <image_1>In the circuit shown in the figure,$MN$is a pencil lead with uniform thickness and texture, the power supply electromotive force is $E = 3\text{V}$, the internal resistance is $r = 0.5\Omega$, and the constant resistance is $R = 2\Omega$. It is known that when the contact $P$of the wire is connected in the mid... | [
"The total resistance value of pencil lead $MN$is $2.5\\Omega$",
"The total resistance value of pencil lead $MN$is $5.0\\Omega$",
"As the wire contact $P$moves from $M$to $N$, the power of the resistor $R$keeps increasing",
"As the wire contact $P$moves from $M$to $N$, the output power of the power supply kee... | BC | 电磁学_恒定电流 | phy |
50013457-1_9 | iVBORw0KGgoAAAANSUhEUgAAASwAAADJCAIAAAAW4ZinAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd1gU19fH585sL+zSdum9CdIEVBCs2GOJPRpbNEaTmJjkNWqqidFYfqYYeyNqSGLsikaxIqJiAZEiAtJ7213YvjNz3z/WEELTXUBQ5vPkyfMwO3vnzDrfufeee+45AEKIULwoCILQ6XQkSaIoymQyAQBdbRFF10PragN6CnK5PCMjIzc3t66uTqlUqlQqNze3fv362dvbU1Ls4VAi7Fz0A43s7OyoqKiqqqq+ffv6... | null | null | null | null | <image_1>As shown in the figure, half of the single-turn square metal wire frame $abcd$with a side length of $L$is in a bounded uniform magnetic field with a magnetic induction strength of $B$(there is a magnetic field perpendicular to the left side of the vertically fixed shaft $OO'$in the figure. The magnetic field i... | [
"In the illustrated position, the rate of change of wire frame magnetic flux is zero",
"The direction of current changes when the wire frame turns over $90^\\circ$",
"The maximum EMF generated by the wireframe is $BL^2\\omega$",
"The ideal voltmeter in the figure shows $\\frac{\\sqrt{2}BL^2\\omega}{8}$"
] | A | 电磁学_恒定电流 | phy |
50013457-1_12 | iVBORw0KGgoAAAANSUhEUgAAAcUAAAEOCAIAAAB3jJukAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOzdd1hTV+MH8Htys8MeYS9ZoiwVxIXbonWg4t4Va12lWsVa9XXUUbfSoha17opVcC9EURRBEVFBFAHZyE4CITu55/fHfcvPV8E6AknwfJ73fR4LITmBm+89+wAIIYYgCIJ8ErlMkpZ2z9LKsV07F4qmC4MgCKLbAAb++w9UP0UQBFELVD9FEARRD5SnCIIg6oHyFEEQRD1QniIIgqgHylMEQRD1QHmKIAiiHihPEQRB... | null | null | null | null | <image_1>As shown in the figure, the mass is $m = \frac{\pi}{10} \, \text{kg}$, and the length is $L = 1 \, \text{m}$.(The horizontal conductor bar $ab$with resistance $R_a = 1 \Omega$, and the fixed resistor with $R = 1 \Omega$is connected to the ring with a wire. The entire device is in a uniform magnetic field with ... | [
"The current meter displays $1 \\, \\text{A}$",
"Voltage across the fixed resistor $u_R = 2\\sqrt{2} \\cos \\pi t \\, (\\text{V})$",
"During the process from $t=0$to $0.5 \\, \\text{s}$, the amount of electricity passing through conductor bar $ab$is $0.5 \\, \\text{C}$",
"In the process from $t=0$to $0.5 \\, ... | AD | 电磁学_恒定电流 | phy |
50013457-1_19 | iVBORw0KGgoAAAANSUhEUgAAAbMAAACrCAIAAABjfeWSAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO3ddVhTXRgA8HPvgm1sdHdIp6CIiNjdit2BHdjd3Z2f3a2YKNggSopKSAqS0rXePd8fMxARpw4Y4/wen+/5tt14Wbz33JMYhBAgCIIgleD1HQCCIIjMQZkRQRCkKpQZEQRBqkKZEUEQpCqUGREEQar6x8yI2rURBJFDqMyIIAhSFfnfdsekFUetEggEp0+din4TVZBfgOO4lrY2hmFUCrVZ8+at23hpamrWd4AIgsiW... | null | null | null | null | <image_1>As shown in the figure, it is an ideal transformer. The turn ratio of the primary and secondary coils is $k$. The effective value of the sinusoidal AC power supply voltage connected to both ends of the primary coil is constant, and the internal resistance is negligible. The primary coil is connected with a fix... | [
"The number of indications of voltmeter $V_2$is reduced and $\\frac{\\Delta U_1}{\\Delta I_1} = R_0$",
"The number of indications of voltmeter $V_1$increases and $\\frac{\\Delta U_1}{\\Delta I_1} = R_1$",
"The number of indications of ammeter $A_2$is reduced and $\\frac{\\Delta U_2}{\\Delta I_2} = \\frac{R_0}{k... | C | 电磁学_恒定电流 | phy |
50267652-1_1 | iVBORw0KGgoAAAANSUhEUgAAARQAAAEICAIAAAARBpzOAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd1gUV/fHd2a2AcuyC0tHWrAgAmIFC4ot0Whs0VeTaNSor/GNvSRqLImx/BI1auwlWGKvURTBEgmiqCgaBY0ISO9t++7M3Pv74yb78mKD2QWC3s+TJ4+Os3Pu7M53zr3nnnsuASHkYTCYukM2dgMwmKYKFg8GwxEsHgyGI1g8GAxHsHgwGI5g8WAwHMHiwWA4gsWDwXAEiweD4QgWDwbDESweDIYjWDwYDEf4jd2A... | null | null | null | null | <image_1>As shown in the figure, the xOy plane is located in the paper, there is a uniform strong electric field in the positive direction of the y-axis in the second quadrant, and there is a uniform strong magnetic field perpendicular to the paper and inward in the fourth quadrant. There is a baffle EF parallel to the... | null | \frac{\left(25+11\sqrt{2}\right)d}{2v_0} + \frac{\left(5+\sqrt{2}\right)\pi d}{8v_0} | 电磁学_磁场 | phy |
50267652-1_2 | iVBORw0KGgoAAAANSUhEUgAAAT4AAADzCAIAAACQW+25AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOx9d1hUx/f+LdsXlqZUUUQEC6LYsaEYNBaM2GLvBTu2GDW2aDSxYKFYYm9BRewo9gYKIoqCICIiIL1v31vm98fks19+CCttYQn3ffLkSZZ7584t78yZM+e8BwUAIAwYMGhowOq7AwwYMKgOGOoyYNAgwVCXAYMGCYa6DBg0SDDUZcCgQYJV3x1gwOBf0DRNURRJkgiCYBiG4ziO4yiKlj6Goiiapktvi6AoimEYhmFl... | null | null | null | null | <image_1>In the rectangular coordinate system xOy, in a cylindrical region I with O as the center of the circle and a radius R, there is a uniform magnetic field that runs inwards perpendicular to the paper. The region II with R \leqslant x \leqslant 3R and y > 0 is filled with uniform electric fields in the positiv... | null | \left(3R, -\frac{3}{5}R\right) | 电磁学_磁场 | phy |
50267652-1_3 | iVBORw0KGgoAAAANSUhEUgAAAUEAAADVCAIAAABG7NWHAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOxdd1xT1xd/7yUQkkA2S1CGyFDBhVtwAm7FLWrdVlGrts7WUVdFtA6sWxEnjrp3XbVaR39uARd7iuyV+cbvj6OvKSDFJCZg37f99FPy1rnje++55557DkpRFMKAAYNaC8zUAjBgwEAvMBxmwKB2g+EwAwa1G2wjf4+iKFiBoyiKoqiRv86AwZcHY8/DJEkWFRU9fvyYJEkjf5oBgy8SRuUwRVE4jl++fHnFihUqlYox... | iVBORw0KGgoAAAANSUhEUgAAAQUAAADsCAIAAADyyCQ4AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO29d3xUVf7//z63TJ80Eggh9BpaKAFCFaSoa8EPdnFF1B8o7lKF37IsKCLCqqiIsGtdxYYiCHaKCFIUhKWGEFoIJSEhdSbT7z3v7x8HJtkkhAmZOQmZ+3ygD5i5c889M+d1yvt9zvtNEBE0NDQAAECo6wfQ0KhHaHrQ0ChD04OGRhmaHjQ0ytD0oKFRhqYHDY0yND1oaJSh6UFDowxNDxoaZUh1WzwiIqLX6xVFUZIk... | null | null | null | In <image_1>the planar rectangular coordinate system xOy as shown in Figure A Within (where Ox is horizontal and Oy is vertical), the rectangular area OMNP is filled with a uniform magnetic field (magnetic field at the boundary) with magnetic induction intensity of B and a direction perpendicular to the paper and inwar... | null | \frac{8\sqrt{3}qB_0d}{3(2n+1)m} \quad (n = 0, 1, 2 \cdots), \quad \frac{4\sqrt{3}}{3}d | 电磁学_磁场 | phy |
50267652-1_5 | iVBORw0KGgoAAAANSUhEUgAAAYMAAAEUCAIAAABGZc2+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd3wURRvHZ3av5VIuCSEhtIT0UEIqARSp0qSogIAgIvpaEQTpIEixYAMUQVREkSqggHSkhx56CxDSey6Xy/UtM/P+sckRQkJLOcT5fvxDJnv7PM/szG+n7QwkhAAKhUJxKIyjHaBQKBSqRBQK5TFAVkX63V02WOu+UCiU/ypVKRHVnSeK8qOBEEJ7IiEEQmhPoVAcRVVKRHlCIIRgjAVB0Ov1xcXFnp6ePj4+UrrF... | null | null | null | null | <image_1>As shown in the figure, in the region of 0 ≤ y ≤ d of the xOy coordinate system, a uniform strong electric field along the positive direction of the y-axis is distributed, and in the region of d ≤ y ≤ 2d, a uniform strong magnetic field is distributed inward perpendicular to the xOy plane. MN is the interface ... | null | \frac{n\left(3\sqrt{3} + \pi\right)}{225} \text{s} \quad (n = 1, 2, 3 \ldots) | 电磁学_磁场 | phy |
50267652-1_6 | iVBORw0KGgoAAAANSUhEUgAAAekAAAFKCAIAAAC2JDCAAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd0AUR/T4b69z9AOpAlYQG9gVLNgFwYaKGlvssUVDFE1M7DG2aCwxURSxV1AsWFAiltgLoIBSlCK9Xb/b3dnfH/P93o+vGoN3sLve+PkrOdmb925m3s68efMeRlEU5wtf+MIXvvBZwWVagC984Qtf+MIn88V2f+ELX/jC58cX2/2FL3zhC58f7LXdJEkCAJiWghkAAAAA1I4iKIoiSRI1rSGI647gaNdPc4MfZ6nt... | null | null | null | null | <image_1>As shown in the figure, there are multiple closely adjacent uniform magnetic fields and uniform strong electric fields on the right side of MN. The width of the magnetic field and electric field is d, the length is long enough, the magnetic induction intensity is the same, and the direction is perpendicular to... | null | \frac{3mv_0^2}{4qd} | 电磁学_磁场 | phy |
51541465-1_1-4 | iVBORw0KGgoAAAANSUhEUgAAAYAAAAERCAIAAAD9n+cOAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOxdd4BURdLvnpmdDbM5sOQlR0GRnARBQZCco2QQDGe4u88L330XvPP0PMOZCJJRsgookhQUEMkCknNadtmc08z098frqu735k1CZJHr+u7D3dmZN/26q35V9avqfpQxRpQoUaKkMsRS2QNQokTJf68oAFKiRMltEJfLVVZWGuynFAApUaLkJwtjx48effeNfzudzqA+pwBIiRIlP1UYITu+3rZmxYrsrMygPqgASIkS... | null | null | null | null | <image_1>As shown in the figure, A is an L-shaped frame, fixed pulley 1 is fixed above A, fixed pulleys 2 and 3 are fixed on the vertical wall, fixed pulley 1 and fixed pulley 2 are on the same horizontal line, and fixed pulley 2 and fixed pulley 3 are on the same vertical line. The object B is connected to the L-shape... | [
"The contact surfaces of A and B have elasticity, and the elasticity does positive work on B",
"During the fall of object B, the speeds of A and B are always equal.",
"The falling time of object B is $\\sqrt{\\frac{(M+5m)d}{2mg}}$",
"When object B falls until it comes into contact with A, the velocity of B is... | ACD | 力学_机械能及其守恒定律 | phy |
51541465-1_25 | iVBORw0KGgoAAAANSUhEUgAAArIAAADtCAIAAADMXAHcAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOzdd1gU19oA8JnZ3pfey7L03rtYQcCuUaPGmn7T7k35ktzc9HLT202iMWosscTeewOVIooiIIr03jvbd+b7YxUXpOwus4D6/h4fH5idOXN2OTvzzjtnzkEJgkAAAAAAABAEG+0KAAAAAGCsgLAAAAAAAHdBWAAAAACAu6i6rabpf4Bq/awNJbdOAAAAABgVOmYLUK1zP/rAv8Go1erqqqqC/Pzh1hQAAAAARmb0mwg1... | null | null | null | null | <image_1>As shown in the figure, there is a game track in the vertical plane, which consists of a tilted straight track AB, a conveyor belt and an arc track FGH. The CD part of the drive belt is horizontal, its length is L=1.2m, the radius of the large pulley is r=0.4m, and the bottom E point is on the same horizontal ... | null | $v_D=3m/s$when $0 \leq h \leq 1.05m$;$v_D=\sqrt{20h - 12} \, m/s$when $h>1.05m$ | 力学_机械能及其守恒定律 | phy |
51541465-1_26 | iVBORw0KGgoAAAANSUhEUgAAAnkAAAEICAIAAACs/XUPAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd0AUR/vHZ673yt3Re1VBVOxiwxbsvRtNNd2Y5E0v7y/tzfumaYpJTGISNbHEbmJXYsWGoiAqvcNxlON62/n9sbd7h6BiggIynz+U2927ndl95vk+88zsLEQIAQwGg8FgMHcNRnsXAIPBYDCY+xxWexegCU6ns6y0pLKigsfjhYSGKZTK9i4RBoPBYDD/lI6itVardfNv63/54XujwRAUEmLQ6w0G4/jJUxY9/EhA... | null | null | null | null | <image_1>The figure below shows a schematic diagram of a certain game device. AB and CD are both quarter-arcs, E is the highest point of the arc DEG, and the junction of each arc track and the straight track are tangent. The angle between GH and the horizontal is θ=37°, and there is a spring at the bottom H. A, O, O, D... | null | ① If the ball release height is $ h < 1.6m $,$ s = 0 $
② If the ball release height is $1.6m\leq h < 2.24m $,$ s = 2.5 \, (\text{h} - 1) $
③ If the ball release height is $2.24m\leq h $,$ s = 1.6m $. | 力学_机械能及其守恒定律 | phy |
51541465-1_33 | iVBORw0KGgoAAAANSUhEUgAAAbgAAAD5CAIAAADa27eZAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOy9d1xT1/sHnkFIwgoQElbYYQoICAIiiHtvBQVttVps1Wqt+rVC6/gIWLWtC617g4h7oBVwIQgoM4DsHRJCJknIHr8/zu91f/kBouJglPfLP/C5Nzf35Nz7nOc84/3A1Wo17JOghsHg3f74QMA/7auHMYxhDONrAPHJV4D39McH/hvG/wuFQsHlcsVi8Ud9SiaTsdlsqVTaXSKTyVgsluahYQxjGH3GpyvKYXwG1NbW... | iVBORw0KGgoAAAANSUhEUgAAAwMAAACcCAIAAACsmOB/AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOx9eZwdVZX/va/79ZbuTrpDCGTfN7IRshBICKvyYVFHCIqADooL85PPoCAq4oiyDWpgXFCcQXYhBBACqAiSsCUhgZCNJJ0VEgLZt046vff9/VF1trvUq9dZiPOZ+ij9UnXr3nPP+d5zzj3nVJU2xih2RP/QyiijlNYGzuroilbG6KiVxnu0NnCR/9FKqbhzbTTrRyulon7iRtENRlsdKGPiYbSBU/HgfKyYEO3tJ/pp... | null | null | null | An experimental team used <image_1>the device shown in Figure 1 to explore the "relationship between work and speed changes." During the experiment, when the car hit the brake device, the hook code had not yet reached the ground. Some of the steps of the experiment are as follows:
(1) Fix a long wooden board with a fix... | [
"Raise the right end of the long wooden board appropriately to balance friction",
"In the experiment, the quality of the hook code was controlled to make it much smaller than the total mass of the car",
"Adjust the height of the pulley so that the thin line of the trolley is parallel to the long wooden board",
... | C | 力学_机械能及其守恒定律 | phy |
51541462-1_10 | iVBORw0KGgoAAAANSUhEUgAAAP8AAAE+CAIAAADNqVE4AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nNy9aXQcR5Im6B5H3plAAon7vngAvAVeEg+JlESqxGpVTUuqKvVMtWq3e7endrt73868eTv/+sf+29md2f4xs292u7fr9dZdpTp1k6WSxEMkRYIgxQMgCYAgTpK4gbwzfH9EuLu5e0RmgpKq5028KiEZYeGHubnZ5+bmFpgQguzL/osRQQgRhBFCmD5CGImXSkMYnfMLI4QIp3GeYMT/OoSwLGK/Jz4UaBAhCGH2Pia0... | null | null | null | null | A certain amount of water is stored in a cylindrical vertical well. The sides and bottom of the well are sealed. A thin-walled circular tube with open ends is fixedly inserted in the well. The tube is coaxial with the well, and the lower end of the tube does not touch the bottom of the well. There is a gas-tight piston... | null | 1.65 \times 10^4 \, J | 力学_机械能及其守恒定律 | phy |
50220052-1_7 | iVBORw0KGgoAAAANSUhEUgAAAZ4AAACTCAIAAAAx9+gyAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOxdd3xT1/V/T09729awZFuSh7y3sQEbG7PDSoAkkEEIZDe7+bVp0qZJms50pGmb1QwggUBCCBA2ZhiDjW088d57D8na643fHwLhIduSLFmy6+/n08Y8vXPuee/de+459557DohhGLCABSxgAfMLOHcLsIAFLGABzseCalvAAhYwD7Gg2hawgAXMQyyotgUsYAHzEHh7CaxvO4Dm3xyTYRQxeIcJaCO3CQ1PQmgymTRq... | null | null | null | null | <image_1>As shown in the figure, three containers A, B and C with smooth inner walls are fixed on the horizontal ground, and their central axes are perpendicular to the horizontal ground. Among them, the inner surface of A is a conical surface, the inner surface of B is a hemispherical surface, and the inner surface of... | [
"The linear velocity of ball A in container A is greater than that of ball B",
"The angular velocity of sphere A in container B is smaller than that of sphere B",
"The angular velocities of the two balls in the C container are equal",
"The angular velocity of ball A in container C is smaller than that of ball... | AC | 力学_曲线运动 | phy |
50220050-1_32 | iVBORw0KGgoAAAANSUhEUgAAAZ4AAADtCAIAAAAA34SDAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydZ0AUV9fHZ7ZX2KX3pfcuRSlSFAQRey+xt5gY86QYTfImpicmxth77xVRQAQUFKQISlV677CV7WXm/bAJWZVdREHAzC/5oDN3btk58/eWc88FYRgGEBAQEN4tUMNdAQQEBITBB5E2BASEdxBE2hAQEN5BEGlDQEB4B8Gov6VcXgBV/qwKOHR1QkBAQHhDNEgbqObPCAgIQwiHw66pqmppapJKpUQi0cDQEE8gkMlk... | null | null | null | null | The cross-section of a conveyor belt device in the vertical plane is shown in the figure<image_1>, with the ab section horizontal and the bcd section being the $\frac{1}{2}$circumference. The conveyor belt is driven by a motor to move at a constant speed of $v=4m/s$. Small objects (which can be regarded as particles) w... | null | \frac{7}{3}\mathrm{s} | 力学_曲线运动 | phy |
50220050-1_34 | iVBORw0KGgoAAAANSUhEUgAAAnYAAAFBCAIAAAB1oXUmAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nNy9eXhdx3UneOo94AHvPew7sXIDSRFcRZHUYu2UbNmSLDu2lHQnEzt7vm4n6elvMnHSk3Hc6XTizkziZLo7SX8dZ+LEie3E8SLZ1i6R2qiFGwguIkGAGwASBAiA2B/wav5495w6p6rufQ8gqThzv08CeG/dWk796iy/qnugtNYAkPs/KAUAKvc7ACiVu69AaZW7qSAoGRQBDQr/EZQxdzSAAtC5H7nKAUBDrpgK/ss1... | null | null | null | null | A certain game device designed by a classmate consists of two parts: track ABCD and arc track EF. As shown in the figure<image_1>, the device is placed vertically on a horizontal table with a height of H=0.62m; the dynamic friction coefficients of the tracks ABCD in the device are all μ=0.5, and the friction of the oth... | null | 0.8m | 力学_曲线运动 | phy |
50220050-1_40 | iVBORw0KGgoAAAANSUhEUgAAAWcAAAEdCAIAAABfYzF9AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOy9Z5Rdx3UuWHVz7ps754AGGqGRCBCBRGQAQFIgRQUGi5Qs2bTneZb0xpo1z/ZbtuSxZM+zvJ4sy0oj0uKzKTGAGSAIgEgEQGQiNNCN7kbnnLtvTjU/7qmqXXXOvd2gKMmzls6SiNv3nlNh11d7729X7TqYEIJ+f/3++v31+2vBl+533YDfX7+/fn/9/+z6vdb4/fX76/fXnV0G+QuCEEIEK//g7N8YUx5DMMIIIYQJ... | null | null | null | null | There are three semicircular smooth runners $C_1, C_2, C_3$, and a semicircular smooth round tube $C_4$, connected in the vertical plane to form a track as shown in the figure<image_1>. Their radii are $4R, R, R$and $2R$respectively. The inner diameter of $C_4$is much smaller than that of $R$. There is a small ball wit... | null | When the ball moves to point F, the trajectory has the greatest elasticity on the ball, and the maximum value is $9mg$. | 力学_曲线运动 | phy |
51534459-1_5-1 | iVBORw0KGgoAAAANSUhEUgAAAPMAAAC3CAIAAABIXf8SAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd1gUxxvHZ/bugDvg4Dh6R7AgglJENPaKBY3diF2TqFGJ0Z+iUdHYooliwRI19l6xi1hQo8YuoigqvSPljnJtd2d+f6xeNqcxAaXv5+HJE+fem5uZ/e6779SFGGPAwVHnIKq7ABwclQKnbI66CadsjroJp2yOugmnbI66CadsjroJp2yOugmnbI66CadsjroJp2yOugmnbI66CadsjroJp2yOugn/s+SCEGLWDBIE... | null | null | null | null | <image_1>As shown in the picture, there is a wooden block $C$on the smooth ground. The wooden block $B$is connected to the $C $by an elastic rod. The elastic rod can be bent without changing its length. At first, the elastic rod was in a vertical state. A bullet $A$entered $B$at a horizontal initial velocity of $v_0=20... | [
"Conservation of mechanical energy of the $AB$system during the process of bullet $A$entering wooden block $B$",
"The overall speed of $AB$when the elastic rod is bent to the right is $50\\text{m/s}$",
"The elastic potential energy that the elastic rod has when bent to the right at its maximum is equal to the k... | D | 力学_动量及其守恒定律 | phy |
51060128-1_1-0.2 | iVBORw0KGgoAAAANSUhEUgAAASwAAABaCAIAAACNE/xKAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dZ1gUydaAQZAkBhQVdVcxgGlFEcUcwHQxAIpIEgFBkoAkUVERBUUWdRe9aw6IAV0xgJhxQRTJGUHiOEiYGZjAMLGnw/ejn4dbt2TdVVdn/G6//zhTVJ+uqlN16lRoZYIglCgoKORHL3krQEHxvw5lhBQUcoYyQgoKOUMZIQWFnKGMkIJCzlBGSEEhZygjpKCQM5QRUlDIGcoIKSjkDGWEFBRyhjJCCgo5QxkhBYWc... | null | null | null | null | There is a groove $A$on the smooth horizontal ground, and a small object block $B$is placed in the center. The distance between the object block and the groove walls on the left and right sides is as shown in the figure<image_1>.$L$is $1.0\,\text{m}$. The masses of the groove and the object block are both $m$, and the ... | null | 5s, 12.75m | 力学_动量及其守恒定律 | phy |
51060128-1_1-1 | iVBORw0KGgoAAAANSUhEUgAAAxQAAABpCAIAAAAstfJEAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAWUklEQVR4nO3da1RTV94G8HOSEGJCIoEQRG4il0HLVVsVikpfSws4Fq0XnEplylpqxbIqlKltx2qXXcNyzbDWlNZRWytWOzpTUEetWmq5NPUCRUIREEHLTcBEuUOAXE/eD+nk5QXFpBVPYp7fp2Szd/hHFvFhn332JvV6PQEAAAAApmHQXQAAAACANUF4AgAAADADwhMAAACAGRCeAAAAAMyA8AQAAABgBoQnAAAAADMgPAEAAACY... | null | null | null | null | In order to study the sliding of surface objects during the movement of the iceberg, Xiaoxing found a water tank long enough and placed a carriage with a mass of $M$and a length of $L$in the water tank to simulate the iceberg. There was a slider with a mass of $m$($m<M$) and negligible volume in the carriage<image_1... | null | d + \frac{3M^2 - Mm}{k(M + m)} \left( v_0' - \frac{kd}{M} \right) | 力学_动量及其守恒定律 | phy |
51060128-1_2-0.3 | iVBORw0KGgoAAAANSUhEUgAAAfIAAADJCAIAAABXOSddAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAadUlEQVR4nO3deXxU1aEH8HPunS2ZzGQlJCSYQBLIQkIwqCgqKRAWEVCqtYJ28dlV+9xR248K9vmx1uerVm3dqmixVtyRRWWRRQTCpiUBEpbsTPbJNvvce94fA2nKMpOJhHNP+H3/IpMZ/TkOvzlz5px7KGOMhMAIoSf/QE7+GQAAtEjXj/vQ0/7Ah9/vb2pqstvthDGdXp+dnX3GuymK0tLc3NraSgiRZTknN/e8JwUA4KY/ta4V... | null | null | null | null | As shown in the figure<image_1>, above the rough insulation horizontal plane, there is a uniform electric field horizontally to the right in the space to the right of the vertical line $MN$. Multiple identical non-charged insulation sliders are arranged on a straight line in the direction of the electric field, and the... | null | 6 | 力学_动量及其守恒定律 | phy |
51060128-1_2-0.4 | iVBORw0KGgoAAAANSUhEUgAAAdkAAADYCAIAAAAoDg5EAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOzdd3wURfsA8J1tV1MuPYFQEyBUpYQWegAFBUFfRRQLRYoCIsWOothf9QUB6UWqUqUoPYBKr4E0SgIJaZdcrt/ebZn5/XFwnoAFfxcS4Pl+/MfNsDu7t/vc3OzMM4gQQgEAAKhSdFVXAAAAAMRiAACoBiAWAwBA1fubWIwxdtjtWFH8NyqK4nK5BEG4obDb7XY4HMofC0uS5HQ6PR7PDYUdDofb7cYY+28URdFht8uy... | null | null | null | null | <image_1>As shown in the figure, the masses of blocks $A$ and $B$ are $m_A=2,text{kg}$,$m_B=1,text{kg}$, respectively, connected by a light rope and tied to the ceiling with a light spring with a stiffness coefficient $k=500,text{N/m}$ and hung on the ceiling without moving. Directly below $B$ is a quarter-smooth fixed... | null | \[ Q = 4 - \frac{12}{5} \left( \frac{1}{3} \right)^{2024} \, \text{J} \] | 力学_动量及其守恒定律 | phy |
51060128-1_2 | iVBORw0KGgoAAAANSUhEUgAAAigAAABdCAIAAAAAHwqJAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dZ0AUydb3O05khmFIQwbJoGIAFXPALIJZcI2AOa2KAWVXgmLOOSDq6q6oiGLAjKCYdQVFEEVEgiKSYWBmuuf90O/dO1Qjuj4K6936fZxDdZ8KXf+qc6obVK1WIxAIBAKBNBZYUzsAgUAgkH8XUHggEAgE0qhA4YFAIBBIowKFBwKBQCCNChQeCAQCgTQqUHggEAgE0qhA4YFAIBBIowKFBwKBQCCNChQeCAQCgTQq... | null | null | null | null | <image_1>As shown in the figure, there is a horizontal and rightward uniform strong electric field (not shown in the figure) in the space. The electric field strength is $E=250\,\text{V/m}$. There is a uniformly charged long plate $A$on the insulated horizontal plane. There is an insulating baffle on the right side. Th... | null | \[ x_0 = 0.48 \left( 2n^2 - 2n \right) \,\text{m} \quad (n=1,2,3,\cdots) \] | 力学_动量及其守恒定律 | phy |
50220048-1_9 | iVBORw0KGgoAAAANSUhEUgAAAhYAAAC9CAIAAABgYaOAAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOy9d5MkOZIvBkSkzsosrbWWXaq1nB61c7u37+QTpNFImvGPR+O32E9Co/HuGZ8w3q241TM9Pa27q7u01lprLTIT/CMDgDsCkZnV3TPHZzZhNtNZmQjA4f6Du8PhHkEZY+TH68frx+vH68frx+vyl/GvTcCP14/Xj9eP14/Xf6/Xjybkx+vH68frx+vH6z2vH03Ij9eP14/Xj9eP13teriS/xw9KKGGEEEYoIYTCXxgV... | null | null | null | null | <image_1>As shown in the figure, the smooth parallel metal guide rail is formed by smoothly connecting inclined rails on the left and right sides and a middle horizontal rail, and the spacing between the guide rails is $L$. A fixed resistor with a resistance value of $R$is connected to the upper end of the left incline... | [
"When the metal rod passes through the magnetic field regions $I$,$II$for the first time, the ratio of Joule heat generated on the constant resistance is $1:4$",
"When the metal rod passes through the magnetic field regions $I$,$II$for the first time, the ratio of the change in the momentum of the metal rod is $1... | BC | 电磁学_电磁感应 | phy |
50220048-1_15 | iVBORw0KGgoAAAANSUhEUgAAAZsAAAC/CAIAAACnsOY7AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOy9eZhdV3UnutateR5UVRpKQ1VJtjValmV5HgEbTIBghg5DaEK/DhmadMh7zfuSJp1AZ3jdSTohyUtewKTpdAgkBLAJNjYGD7KxjeTZsiZrlmVJJalUUqkG1bjfH3evae997r1VqpIJn89nq6rO3WcPa//2Wuu31zr7onMO3rzevN683rx+Kq7cG92BN683rzevN69Zu97UaG9eb15vXj8915sa7c3rzevN66fnelOj... | null | null | null | null | <image_1>A smooth, horizontal long straight track is placed in a uniform magnetic field $B=0.25\,\text{T}$, the track width is $0.4\,\text{m}$, a conductor bar is also $0.4\,\text{m}$, a mass of $0.1\,\text{kg}$, and a resistance of $r=0.05\,\Omega$. It makes good contact with the guide rail. When the switch is connect... | null | 0.4J | 电磁学_电磁感应 | phy |
50220048-1_55 | iVBORw0KGgoAAAANSUhEUgAAAR0AAAB9CAIAAAAQiyDCAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOy9d3hcxbk//s4526VdrXq1JEuybBXb2JZsucgY29gGTAIJEOolPSQ3lFByb3pvXJLLDQklhNyQUAIkQEK1bINBNi4yMbhhW3IvsmVbvWt35/fHOTPzzpxzdlcGcr/P72GeB7w6Z86Ud95538+87zszhFIKH6WP0kfpA03a/3UDPkofpf8fpo/m1Ufpo/TBp4/m1Ufpo/TBp4/m1Ufpo/TBJ1eC9xQAgBLzH2L8TYy/... | iVBORw0KGgoAAAANSUhEUgAAAJAAAACWCAIAAAC+fZbyAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO19WXBdx3nm3+euuNj3hdgXAiQBUCQAUiNKoqidkUXZ8cSWPeNJZp5SZc9LXFOVmpeZVJKnVE3V5CHOQ1LlqpHl3SXRI1m2LJmyTFEiCZAgQazETuwAsRDr3XoeTi9/9+lz7gUgZyZT7rLFi3v79PZ3f/39S/chlFL4Q/rXk/yuv1CghAIQoPb/CQBw2VJCCRAAoBQIAAClBIB95AUQ+QkACMtqP8UeB0Ip+4oA8LJE... | iVBORw0KGgoAAAANSUhEUgAAAIoAAACWCAIAAACO8YfTAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO19eXCcyXXf67kHmME9g5sAZsADALm87z24Sy65K61AWbIVO442Urlcip3kj1SlKq6yLKtSslOVSpVjV5w4qopKdsqOtNqslqSlXXK5XO0uVzyWIMEDIEHiPghyBgcJYAZzd/74vu5+3V9/g8FKcVwpdWnFwXf03b/3e69fv49QSuFX6R9rcvy/rsCvUrH0q+H5R51+NTz/qNOvhucfdXJJf1GghAIQoMZ/BAAoBSAA... | iVBORw0KGgoAAAANSUhEUgAAALQAAACQCAIAAAAuktZFAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO19WZCcx3FmVt8994GeA3NPA3PgGMwMeIgkCIqQSYkmCchShHU4NiStLL04djfCsS/rB2+EHfuijfA+bOxK1oYOO2SFJVGxPHTw0EGCIkEQmAZxDICZwTE35r6v7unu2of/r6rMqvq7e0ja3gf8IRE93fXXmZVffllVWYxzDvef+4/t8f1bV+D+8//vc1847j+ez33huP94PveF4/7j+dwXjvuP53NfOO4/ns994bj/... | iVBORw0KGgoAAAANSUhEUgAAALYAAACiCAIAAABj1aDeAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO19aZBdx3Xe6bfOzJsNs2F2DIDBRmwzDwABgZQEUgppRdZGR1RcrnIU2bErqWyuyl8v5aq48ityftlVSezyQkU2pUh2JJKSGC6AQCwEBhuxDTDADGbDYGYw+/bevNf5cW+fPqe7771vQCpxVXCrSLx5r2+vp7/vfKf79hVSSnh6Pb2Cr9j/6wo8vf6hX09N5OkVcT01kadXxJUI+1GCFBKkAAABEoQAACkBhAQAIYX3... | <image_1>As shown in the figure, the four areas between the two square dotted boxes have uniform magnetic fields of equal magnitude. The two areas on the left face inward perpendicular to the paper, and the two areas on the right face outward perpendicular to the paper. There is an existing square metal wire frame $abc... | [
"<image_2>",
"<image_3>",
"<image_4>",
"<image_5>"
] | AD | 电磁学_电磁感应 | phy |
50870295-1_19 | iVBORw0KGgoAAAANSUhEUgAAAX8AAAC/CAIAAACZuUswAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO1dd2AURRff2b2Wa+k9IYQUahJ67wiCNBEboqigIEpTEAVBRFQQCwLSlCqggmIBEaRLkV5CCwkhHdJIL9d2d74/Lpdc2d3b3dtLQr79/aFhb2bem/bmvTdvZgCEEBEhQoSIeoeE/ieIIMD2n3YADmlEiBAhgi1Ak9R9SJKEECIIBABFEARCiEAIUAAACoAoLkWIaBRg0H0eVZAkefjggbOnTul0uhZRUR06dzl5/Gji... | null | null | null | null | A student designed a voltage stabilizing circuit as shown in the figure<image_1>. The primary coil of the ideal transformer is connected to a sinusoidal AC power supply with a voltage of $U_0$through a transmission wire. The transmission wire has a certain resistance value of $r$, and connected in parallel to the secon... | [
"The voltmeter's $V$indication becomes larger",
"Reduction in efficiency of transmission line transmission",
"The frequency of magnetic flux changes in the transformer core becomes larger",
"In order to ensure that the voltage across the appliance $R_0$remains unchanged, the contact $Q$on the secondary coil c... | B | 电磁学_交变电流 | phy |
51315798-1_1-1 | iVBORw0KGgoAAAANSUhEUgAAAYsAAADGCAIAAACsMzvaAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO3deUBU1f4A8Hvv7DALDLvsqCgCgoHigokoLqUWLqjlrmWaGZGaZmlP03DL6leaZrkvqc9Mxb1cEs2nIiY+QQTZtwGGmYHZ557fH/e9ad4duSjrCN/PH+/ZmXvvOcPMfO+5Z8URQhgAANgkoq0LAAAA9YIIBQCwXexnOIb2GIi3VFkAAOB/PUsdCq/n3wAA0LKepQ7VngMTQujmzZupqak6na6tyhAUFDRixAiBQNBW... | null | null | null | null | <image_1>The figure below shows a device designed based on the principle of force exerted on the wings when the aircraft is taking off and landing, and is used to monitor changes in river flow velocity. The wing-shaped probe is always in the water, and the sliding blade $P$of the sliding rheostat is moved up and down t... | [
"As the water flow speed increases, the indication of the ammeter becomes smaller",
"As the water flow speed increases, the ratio of the indications of the voltmeter to the ammeter becomes larger",
"The value range of the sliding rheostat allowed to be connected to the circuit is $20\\sim150\\,\\Omega$",
"The... | D | 电磁学_恒定电流 | phy |
51315799-1_18 | iVBORw0KGgoAAAANSUhEUgAAAaQAAACkCAIAAABXWc3WAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2ddXwUR//HZ/Vuz3K5uHsCBCdIcacUKYVCKdYWKrT0aUu9T90NqtRbqr9SQYoUdwgJkhBIAklIciEhuXjO79Z/fyzcc9xd0BBj3q8KzO7Ozsl+buZrg4iiCCAQCKSzg7f1ADoM1QZDxqFDt02eLJPJWueOxqamzIwMQ1WVCACO4UOGDU1ITGydW0MgnQ8Ezuwui9Fo/OuPP79asaK2tja/qFCr1d7oO9I0/c+6dR++... | null | null | null | null | Connect the coil with a self-inductance coefficient of $L$wound on the plastic tube, the high-voltage DC power supply, the capacitor with a capacitance of $C$and the single-pole double throw switch $S$to the circuit shown in the figure<image_1>, and fix a metal ball in the tube on the right side of the coil. First conn... | [
"Capacitor is charging",
"The upper plate of the capacitor is positively charged",
"Looking from right to left, a counterclockwise current flows through the coil",
"The metallic ball is subjected to a magnetic field force to the right"
] | D | 电磁学_电磁波 | phy |
51315799-1_15 | iVBORw0KGgoAAAANSUhEUgAAAbkAAAClCAIAAABOVRQrAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO3deVwTV7sH8MlOSEjCvsgSkR0RQS0FLSKgILaKaNXXrS61rdYuXK2trbZq1au3H8Wr0taWuqIV9wVFURYBqQs7IrIIyk4ghJB9m9w/5nPz8iIaxcgAPt+/nMkkeRLjzzNzzpxD0Gq1CAAAgBciP2c/FqCE//9Dd4Q3XBIAAAw4z8tKwjN/AACAtxcR7wIAAGAQgKwEAAD9ICvBGyGRSE6cOJGXl4d3IQAYBmQleCOe... | iVBORw0KGgoAAAANSUhEUgAAAVMAAACiCAIAAABzkLkrAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dZ1wUV9fA753ZvrSld5AmQkC6oChijSJ2Y401mjzRaKxJNMlrEo3GRIw9mhj1MRELYqKioFIEVLAriEiV3mGBZeuU98OwCw+iUnaRhPn//ODO3jn33GXO3HbOuZAkSUBDQ9PHQN62AjQ0NG8B2vJpaPoitOXT0PRFaMunoemLvE3LVygUkZGRiYmJb1EHGpq+ydu0/OLi4vT0dAaD8RZ1oKHpm7xNyy8sLCRJ0s3N... | null | null | null | In <image_1>the rectangular coordinate system shown in the figure, the $y$axis is the interface between media I and media II, and the speed ratio of mechanical waves propagating in media I and media II is $1:2$. The wave source $S_1$with amplitude of $1\,\text {cm}$is at $x=-8\,\text{m}$, and the wave source $S_2$with ... | [
"The starting direction of the wave source $S_2$is along the positive direction of the $y$axis",
"The speed of wave propagation in medium II is $2\\,\\text{m/s}$",
"The location coordinates of point $P$are $x=6\\,\\text{m}$",
"The distance from $t=0$to $6\\,\\text{s}$is $16\\,\\text{cm}$"
] | AD | 力学_机械振动与机械波 | phy |
51315799-1_10 | iVBORw0KGgoAAAANSUhEUgAAAQQAAAEUCAIAAABCvN/GAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydZ1wUZ9eHp2zfZVl6L4qAFGlKUcBu1NhiVyzRqG+MNUaj0SRPTGyJxhJrMJpo1Ig1KgYLChaqoPSisIDS68L2MuX9MD48BAQRtrA41y8f4uzM3GeX+c9dzrnPAXEcB0g0SVlZ2a5du7Zs2WJjY6NrW0g6AtK1Ab0cHMdv3LhRVVVFoVB0bQvJWyDFoFkQBHnx4sWYMWOMjIx0bQvJWyDF8D/KysoEAoF675mdnc3n... | null | null | null | null | <image_1>As shown, in a homogeneous medium, the coordinate system $xOy$lies in the horizontal plane.$ The wave source 1 at the O$point starts to move simply harmoniously along the $z$axis perpendicular to the $xOy$horizontal plane from the moment $t=0$. Its displacement varies with time with the relationship $z=2\sin5\... | [
"The propagation speed of this mechanical wave is $5\\text{m/s}$",
"$t_0=0.4\\text{s}$",
"After the vibration stabilizes, the particle at $C$is the weakening point of the vibration",
"During the time from $t=0.8\\text{s}$to $t=1.6\\text{s}$, the distance traveled by the particle at $C$is $16\\text{cm}$"
] | AC | 力学_机械振动与机械波 | phy |
50267652-1_3-4 | iVBORw0KGgoAAAANSUhEUgAAAkwAAADUCAIAAADhrOuTAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd4AURfb4X1X39MSdzTmxRAEJEkSCGQUBURQzxxdQMZ+envr19PC+/vROT88TFQxIUDw9Dz1AREBAEJScM0vYwOadTZM7VL3fHz07OxtEmOX0ZPvz1+70dPWbqup69V69ekUQEQwMDAwMDM5H6C8tgIGBgYGBwX8KQ8kZGBgYGJy3GErOwMDAwOC8xVByBgYGBgbnLYaSMzAwMDA4bzGUnIGBgYHBeYuh5AwMDAwM... | null | null | null | null | A device uses electric and magnetic fields to control the movement of charged particles. The working principle is shown in the figure<image_1>. The emission source $A$(close to the left polar plate) that can move up and down continuously emits particles with a mass of $m$, a charge of $-q$, and an initial velocity of $... | null | \frac{25}{9} | 电磁学_磁场 | phy |
50267652-1_3-5 | iVBORw0KGgoAAAANSUhEUgAAAZIAAADICAIAAABNgvCIAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO3daVwTV78H8MwkIWHfZVHZiihaASngilq1LHqpoGItPioiPO6trcqtti6tyy1VFBXrAoroo2LFDcS94EYVQfFqa8UiooBsYQsh68yc++I8zcNVa0USYpL/94WfOJDkkMz85pwzZ84hEEIsAADQHqSmCwAAAB0DsQUA0DIQWwAALcPpyC/jXjCCxUIsFtFuS3uEqkoGAACvRECXvG5Qfo8EAWcOoOOgkagLEEItLS37... | null | null | null | null | <image_1>As shown in the figure, in the spatial coordinate system Oxyz, there is a uniform strong magnetic field in the negative direction of the z-axis in the space where z > 0, and there is a uniform strong magnetic field in the positive direction of the y-axis in the space where-0.1m ≤ z < 0. At a certain mome... | null | (\frac{5}{\pi} \text{m}, \ 22.1 \text{m}, \ 0) | 电磁学_磁场 | phy |
50267652-1_3-6 | iVBORw0KGgoAAAANSUhEUgAAAZUAAAEQCAIAAAD3RH4HAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd3wUVff/507Z2Za66QmkkAQklIQaWgICAgpBgsBDEZTe5KGJoIggAqKgKMIjihQDSFGKNBXpIL3XEBISUkhvu9ky7f7+uM+z3/xCC8nszrKZ9yuvlzLZzLl7Z+Yz95577jkAQojJyMjIvITgUjdARkZGpobI+iUjI/OyIuuXjIzMy4qsXzIyMi8rsn7JyMi8rJDP+wBanQSP/U9lgC1aJiMjI/NsgOPET6CWAACe... | iVBORw0KGgoAAAANSUhEUgAAANUAAAEUCAIAAAAz4eRxAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOxdeXgURfququ6eK5P7JJCEI+EIEK5wX8olcqmseOC5niCuorK/ZT1xlV1xFe/1XlRAkUMFQbkRkCBnwg2SBELOyTX31d1V9fujwjgkkMxMtxNkeR8fH6Yz89XR1V1Vb33f+0FKKbiKq2gloNauwFX8T+Pq+LuK1sTV8XcVrYmr4+8qWhNXx99VtCb41q7AxUEIwRgTQiCECCGO4yCEv1MRAACe5xFCqhfBgDHGGFNK... | null | null | null | To detect radiation, Wilson used cloud chambers placed in a uniform magnetic or electric field to show their tracks. A research team designed the electric and magnetic field distributions as <image_1>shown in the figure. In the Oxy plane (paper surface), there is a uniform strong electric field parallel to the y-axis i... | null | x_4 ≤ \sqrt{2dd_0} + 3d | 电磁学_磁场 | phy |
50267652-1_3-7 | iVBORw0KGgoAAAANSUhEUgAAAOoAAADICAIAAABpkuokAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2deVwUR/r/q7p77hmQa/BAEOUS8UYiGjwAQVRIVjcm+oqu5vjltcY1ye4r3yRuNrovN65LTDabmGvdkMRERU0UIwkxazwTD4IRUQQlyiEBATkGhjn6qPr9UWaWoPGYGYZprPfLP2ba5ulnqj9d/XR11fNAjDGgUOQJ09sOUCjOQ+VLkTFUvhQZQ+VLkTFUvhQZQ+VLkTFUvhQZQ+VLkTGeky/GGCHkscNR7gY8J1+r... | null | null | null | null | <image_1>As shown in the figure, a plane rectangular coordinate system xOy is established in a certain space. The first quadrant has a uniform strong electric field along the negative direction of the y-axis, and the electric field intensity is E. There is a uniform magnetic field inward from the vertical coordinate pl... | null | B = \frac{n}{n-1} \sqrt{\frac{mE}{qd}} \quad (\text{of which} n = 2, 3, 4, 5),\quad t_m = (8 + 6\pi) \sqrt{\frac{md}{qE}} | 电磁学_磁场 | phy |
50267652-1_3-10 | iVBORw0KGgoAAAANSUhEUgAAAfUAAAFQCAIAAAAp+3AbAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd3gU1dfH752yLcmmF5IAIZTQIfQivQiKIoKKCNJr6L1IBylSRBSQovQiiqCo9K703gkESC+bun1n7j3vHwP58WoIKbvJZrOfh0cp2dk7M3e+c+65p2AAQE6cOHHixOFginsATpw4ceLEJnDFPYDSS/bK6dUl1H//0rnAcuLEyevAGLMsizHO8V+d+l4MwEvoSwghoiCYzGaTyWQxm7O0WoNebzAYDHq9KIqCKAKA... | iVBORw0KGgoAAAANSUhEUgAAASwAAAFcCAIAAAD9PRTjAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd3xcxbXHZ+a27auy6l1Wsdx7r9gG27TQQkzvnVCTEHikECDwKI8SQuhgOoSOjTHuvXfjKtmSrV5Xq+33znl/rCSELLct2pE13w8f4HN1tTu6d35zZs6ZcwYDAOJwONGDRLsBHE5vh4uQw4kyXIQcTpThIuRwogwXIYcTZbgIOZwoI0a7AQghBADtkRKMECCEMUZt/+ZwzmyiL0JNVevq6lS/n1KKMcYYC6JgscYo... | null | null | null | As shown in Figure A<image_1>, a certain ion thruster on the space station consists of an ion source, two parallel metal plates M and N with a small hole in the middle at a distance of d, and a cube with a side length of L. The rear end face P is a nozzle. Taking the center O of the metal plate N as the coordinate orig... | null | \frac{3}{5}mnv_0, direction along the negative z-axis | 电磁学_磁场 | phy |
49517053-1_1-18 | iVBORw0KGgoAAAANSUhEUgAAALcAAAEICAIAAACS5/LcAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd1QUSff3p7onMDMgUbIECQJmQFFRMIAgi6KARBERBVFkDWtaXV1ZE5hBVEyILAgrIiqKgisoAmZBSYoIi5gAJacJ3b8/+nn7nYNhDD3MIP05Hg9TE6q65ztVt6pu3QtQFKWQkHwRSNwNIOkFkCohEQ6pEhLhkCohEQ6pEhLhkCohEQ6pEhLhkCohEY4YVIKiKJfLJVfzJBYej8fj8QRLCFYJiqI1NTUNDQ3dypua... | null | null | null | null | As <image_1>shown in the figure, small balls A and B of equal mass are connected by a light rod, small ball B is suspended at point O on the wall with an inextensible thin wire, and small ball A is moved from the position shown under the action of a vertical upward force F (ABO = 90°). Start moving upward along the ver... | [
"If the small ball A moves up slowly, the tension of the thin wire will gradually increase during the upward movement",
"If the ball A moves up slowly, the work done by the force F during the upward movement is equal to the increase in mechanical energy of the ball A.",
"If the small ball A moves upwards at a c... | AD | 力学_相互作用 | phy |
51411292-1_2-23 | iVBORw0KGgoAAAANSUhEUgAAAMkAAAC0CAIAAACxGJ9NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO1dd3wU1dqeme19N7vpjRRSgYSSQAhNRBIwUgURsCIIiCIgAorivQJe9YuFqlxAaYpIKAHEECEYSiihhJKEFNJI2Wx2s9m+U858fxzdm8uFkIRtQJ4/+JHd2Zl3zjzznvec877PQWmaRu6L//0Kvf/BXejCf4HZ5rddTOpC54G52oAuPLbo4lYXHIUubnXBUWg73urC3YBDH9sA6J4jIRRFW//H9ueThi5udQAWi6W5... | null | null | null | null | As <image_1>shown in the figure, satellites a and b are two satellites in the same direction in the equatorial plane of the earth. The opening angles of the earth to satellites a and b are 30° and 60° respectively. Due to the earth's obstruction, satellites a and b will experience communication signal interruption. It ... | [
"0.1T",
"0.25T",
"0.4T",
"0.6T"
] | C | 力学_万有引力与宇宙航行 | phy |
49734231-1_11 | iVBORw0KGgoAAAANSUhEUgAAAXkAAADwCAIAAABqqYPOAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd3xUVfr/zzm3TZ9k0iChhNB7SRZBBSmigqioa8Xe+67yddf2c1fX3teOZVVA7Aqo9CJIk95rQkshkzKT6XPLOc/vjwsRERFIm0nO+zXyInIzc+7cez/nOU87GAAQh8PhNDCkqQfA4XBaBFxrOBxOY8C1hsPhNAZcazgcTmPAtYbD4TQGXGs4HE5jwLWGw+E0BlxrOBxOY8C1hsPhNAZiUw+A84cwxgzDiEYilBqS... | null | null | null | null | In the process of creating electrodynamics, Ampere encountered difficulties in facing the problem of electrostatic induction. Later, the famous genius physicist Kelvin came to help and proposed a wonderful electric imaging method. We felt the top wisdom of mankind from a simple example. The two points of point charges\... | [
"The electrostatic force does positive work first and then negative work on\\(q\\)",
"The electrostatic force does negative work first and then positive work on\\(q\\)",
"The potential at the highest point of the circle\\(c\\) is zero",
"The electrostatic force never does work on\\(q\\)"
] | CD | 电磁学_静电场 | phy |
49734231-1_15 | iVBORw0KGgoAAAANSUhEUgAAAhIAAADSCAIAAACQKL51AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAclUlEQVR4nO3deXxU1dkH8HPOvTOZyTZJCCQhiEACCGjdWNViBStFRHAXl9rWFV6sr1ZFEdePtX19bd9ub2sBLUrfVtsKCGjZsVVUVFBAICwlAUwEs5BJMpPcmXvO8/5xMaWyZWaazJ05v+/HP2wW+2Qmub97zj3POZyIGAAAQMeIZBcAAACpBLEBAAAxQGwAAEAMEBsAABADxAYAAMTATHYBXYqISCln6ZgQgnN+zC9TSjkLzPiX... | null | null | null | null | As <image_1>shown in the figure, above the rough insulation horizontal plane, there is a uniform electric field horizontally to the right in the space to the right of the vertical line MN. Multiple identical non-charged insulation sliders are arranged on a straight line in the direction of the electric field, and the n... | null | 6 | 电磁学_静电场 | phy |
49734231-1_16 | iVBORw0KGgoAAAANSUhEUgAAAdoAAADnCAIAAAA2FQA/AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydeXwV5fX/z3lm5u73ZoUQ9kXWALIvosgmiLJUbd2QoiJu1dp+i61V64atpb+qtVqhWilVlAqCKLhQQWURWQMhCrKHJYSEJGS5+8w85/fH3HtzQ8KiuSM35Hm/eGlyz52ZJzNnPnPmPM95HiQiEAgEAsGFhl3oBggEAoEAhBwLBAJBsiDkWCAQCJICIccCgUCQFAg5FggEgqRAvtANEAgaChFxzgEAo5z9a8Y3GROx... | null | null | null | null | <image_1>If a rectangular ABCD is symmetrically divided into two left and right squares with side lengths of d with MN as the boundary, and the midpoint of MN is O, there is a uniform strong field in both squares. The direction of the electric field in the left square is horizontal to the left, and the direction of the... | null | \(\frac{1}{2n+1}\sqrt{\frac{q\varphi_0}{m}}\) (n = 0, 1, 2 stations) | 电磁学_静电场 | phy |
49734231-1_17 | iVBORw0KGgoAAAANSUhEUgAAAYkAAADwCAIAAAB65Q9XAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd3wUxfvHd2Z3r+Tu0gtJSAgEEgKEKiVEqhTpRYIoTVAUUEHpCCgWfjRREAERpKNfkSYdAYGQREIvoYUkkEBII+0u17bM/P4YPCMikuQ2Bpy3r5cvktztlJ397DPPPPMMwBgzFAqFUsWA/3YFKBQK5RFQbaJQKFURqk0UCqUqQrWJQqFURag2USiUqgjVJgqFUhWh2kShUKoiVJsoFEpVhGoThUKpinAV/D7GGCGE... | null | null | null | null | As <image_1>shown in the figure, the ion source C located below the x-axis emits a beam of positive ions with a specific charge of\(\frac{q}{m}\). The initial velocity range is\(0 \sim \sqrt{3}v\). The maximum velocity of this beam of ions after acceleration is 2 v. It is injected into the area above the x-axis from th... | null | \(\eta = 2:3\) | 电磁学_静电场 | phy |
49734231-1_18 | iVBORw0KGgoAAAANSUhEUgAAAVgAAAFcCAIAAAACnzEBAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd3wVRdfHZ3ZvL8lNrwRCQkIJEEoEFRAEAshDUaR3BIkUBRtYAVEgAhbwkaaooPCIIkh7KNKkGAJISAglEJJAAunl3ptb9u7uvH8M3idvgBjZG1I43z/4kN29Z8/uzPx25szsHkwIQQAAPNowte0AAAC1DwgBAAAgBAAAgBAAAABCAAAAAiGo98CkD+ASQAjqCoQQURQdDofVarXZbOQvOI4zmUyCINz9E47jEhIS... | iVBORw0KGgoAAAANSUhEUgAAAQsAAAD8CAIAAADv1xYQAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd3zURf7/Zz5lS7Kb3gsJLSFIDb2FgCCgKIogRfQidycghwrYAB8ntvsJ1lOwgJxyHvAFBAsRPDxKMEoIRDoRCJ2QTd/sZtunzPz+mGRZkrBC2OznA5nn4x5n2M/s7nvnM6/PzPs975mBGGNAoVCuA6O0ARSKquGU/XrSg0EIb+Sq5z+9dH3X+zQKpRkorBAAgCiKPM832axFUbRarQgh0u4xxgzDBAUFcRwHAEAI... | null | null | null | As shown in Figure A<image_1>, parallel plates M and N with length a are located in the first and second quadrants respectively, perpendicular to the coordinate plane and parallel to the y-axis. The distances between the two plates and the y-axis are equal, and the lower ends of the two plates are on the x-axis. On the... | null | \left(1-\frac{\sqrt{6}}{6}\right)a | 电磁学_静电场 | phy |
50111404-1_15 | iVBORw0KGgoAAAANSUhEUgAAAMAAAAB1CAIAAACXuXmWAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO19eXxU1dn/OXebfSaTmclkmUwm+8JACAkJSySgyCqK8ApFrCD8aqWWvrUutbVv219rq76+ba2WXwFfLQoiFhUBlU0MawIhZCULWQmZyTKZNbPP3HvP748LMYYo2UmA7yeffOZz59xzn3vvd57znOc853kgQgjcxV0MFditFuAuJjbuEuguhoW7BLqLYeEuge5iWLhLoLsYFu4S6C6GhbsEuuOAEKJpeqTcN3cJdMfB... | null | null | null | null | With the continuous development of monitoring technology, surveillance cameras and other equipment are now installed in streets and alleys and every household. As <image_1>shown in the figure, it is a hemispherical transparent material with a radius of R removed from a monitoring device. The center of the ball is point... | null | \(\frac{3R}{c}\) | 电磁学_电磁波 | phy |
50111404-1_27 | iVBORw0KGgoAAAANSUhEUgAAASUAAACWCAIAAAAXLAlPAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO3dd1hT198A8Htv9g4QAmFvZQjIHspy4q671lFn3a2rw9E6Wqt2aLXaWq11a7WO1r03VRAQEFC27EDIInvc8/4RpfzQ9lUMAfR8Hh+fx5ube86N+eaceyYKAEAgCLIIrL0zAEFvERhvEGQ5Lx9v4NnfsP4JQa1EfOkz0WZ/QxDUGp2sPgkAMBqNBY/ylUple+cFgl5ZJ4s3BEEqysvGDht8987t9s4IBL2yThdvqE6n... | iVBORw0KGgoAAAANSUhEUgAAANUAAAA+CAIAAAAzocmVAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAFXUlEQVR4nO2d228UVRzHz/nNzM5euiVb2nKnpWwhaCXcRG7yYARpbRG8EKNE/XsUYzRGiVExmhiMAsVYUWM0ikokMYrxSSVaKqJRA0nN7s7MufiwoezOnBn6UDgPfj+PZ7/57u+c/czsTl/KtdYMAEuQ7QHA/xr4B2ziGlfDMFRSaMZj65zznOeR47QuCiGiKDL25DzPcdveQikVBEEyyRkjx8nlcrFwFEVKqWTecRzP8zi/NqHW... | iVBORw0KGgoAAAANSUhEUgAAAQIAAABOCAIAAABEwI+kAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAFDUlEQVR4nO3ZS2wVVRzH8f//zAUCtEhCwyM+4NoH7U6RBoQAJaKJT4iJFGgrpNG4cUNYSDQGlIC6140LKEgLYsQIiaKCBjXRGDUxiiiPuFDxgUmRVEUu9/xd3JbU9p45U1IoCd/Pjpn5n/nPmfObmVvUzAS4trmRbgAYecQAIAYAMQBEJJe6N9PvZ1Ud0ikz/ii/HMNeDWMOu/QmU9q7qgpVRAKF0bsQOmOsz97TpsbAzJtlXAfO... | iVBORw0KGgoAAAANSUhEUgAAANsAAABCCAIAAABRiDScAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAE50lEQVR4nO3Y3WscVRjH8fOcc2ZmTbLb1EI0raUmba5KrYIVS2he2qjY4h8gipp/w7teiyII0ispRaMl9ca7Qqz6J6g3BgVFfEWoJOludl7OebxIstlkJ7s76yZ5oL/PVbucmTlz5jsvLTGzAhBDH/YEAHZAkSCLbf5L8xuciDpu3PrG72arzjtRShXfT8+H23HofTtuG11+OB3K3Arp7Qtw13ltF+mccy5TvDnKGGOMaXd47zPn... | iVBORw0KGgoAAAANSUhEUgAAAQIAAAA/CAIAAACEvlHAAAAACXBIWXMAAA7EAAAOxAGVKw4bAAADvElEQVR4nO3Yy2tcVRzA8d/v3MdMMoO1remIKGQhNqAuCkJXPtoqoiKGYGoX6qYiIuK/oUu3PlCSYhU3XdRFxUIJ4k5LwS7Vuoxxk9e8cu85x8Xo5OHkztw40zul388qE07u+c29+SZ3rnrvBbi7maIHAIpHBoCEO74+4P2RqvZdM/ihBzlaXtm7j2LHwfWcrdiR9vPfUcdzzmw730V3/m4G3qbWOiv5SzBBEARBxhnx3ts0dc71... | As <image_1>shown in the figure, AB, CD, and DE are fixed on three transparent plates, AB is horizontal, and the inclination angle of CD is greater than that of DE. When a parallel beam of light is incident vertically downward, the image of the following interference fringes may be correct () | [
"<image_2>",
"<image_3>",
"<image_4>",
"<image_5>"
] | A | 电磁学_电磁波 | phy |
50220053-1_26 | iVBORw0KGgoAAAANSUhEUgAAAPkAAAEECAIAAABlVgW0AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOxdZWAURxu+2b27nMbd3QjEIBBcgrtTaEuBIm2BUgFKoUiRQrF+FGihuLtbcA8kBIIlhLi7nt/eznw/FkKIXM5i5J4fgWR2Z2d3n33nndcGIIRoeujRAoA19gD00KOBoOe6Hi0Feq7r0VKg57oeLQV0pa2IRgMf/1odoKY/Nl1ACIuLiwANGBgYGLBYOI4DAABoZnehhwZQznWg9NdmCQjJW9euhV+4YO/k6O7h6eru... | null | null | null | null | As shown in the figure<image_1>, it is a sectional view of a cylinder placed horizontally, and O is the rotating shaft. Now let the cylinder rotate at high speed in a clockwise direction around the central axis. At a certain moment, gently place a small object on point A directly below the axis of the cylinder. The obj... | [
"The ratio of the acceleration of the object at points A and C is\\(\\sin\\theta : \\sin\\alpha\\)",
"The friction force experienced by the mass at point A is less than the friction force experienced by the mass at point B",
"If the cylinder speed is increased, the mass will still stay at point B eventually.",
... | AC | 力学_曲线运动 | phy |
51382433-1_2 | iVBORw0KGgoAAAANSUhEUgAAASkAAADgCAIAAADQawcdAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOx9d3xUVdr/lGRCb4qg0okg9rWva1kFdX1RF2TxFRUEpAgoSm8JJKROkkkmPaSQDimkNxISkpBCOqT3XidtJlMy/d7fH0evDyfou79dYdjN+fL58BkO5z73tO95vuc5597LpmmaRUBAcN/B+a3/oGm6sLDw1q1bMFEmk8XHx4+MjEDG9vT0BAYGyuVymLO2tjYrK0uj0TApOp0uJyenvr4eZpNIJBEREcPDw9Bgd3d3... | null | null | null | null | As <image_1>shown in the figure, heavy objects with a mass of m and 2m are suspended at the left and right ends of the non-extensible special light rope that goes around the fixed pulley respectively. Now they are released from rest. After 3 seconds of movement, the heavy objects on the right side touch the ground with... | [
"The initial height of the right weight from the ground is 45m",
"The speed of the right weight when it first touches the ground is 10m/s",
"After the heavy object on the right side touched the ground for the first time, the rope was tightened again after 3 seconds",
"The right weight hit the ground for the f... | BD | 力学_牛顿运动定律 | phy |
51382433-1_3 | iVBORw0KGgoAAAANSUhEUgAAANoAAACHCAIAAAD/b9ClAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAfv0lEQVR4nO2dZ1wT2cLGJxBKgNCM9E4EIx2RJl1BpQgWcEVd2yJeFBV9dy27iG2tK2C76uoShShdBAWkKCJIEQhSBBWRpSxKLwESSDLzfpjdXBYRAUGinP+PL8ycmXNm5slz+jkYBEEgAIA74JnqBAAA/wPIEcBFADkCuAggRwAXAeQI4CKAHAFcBJAjgIsAcgRwEUCOAC4CyBHARQA5AqYeJpOJdlYDOQKmBgRBent7i4uLDx06... | iVBORw0KGgoAAAANSUhEUgAAALoAAACcCAIAAABHmSaNAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAXaklEQVR4nO3daVwUR94H8K6em7kYRhEYbgG5HjzjiRqCykazrKiIZ6LZuKIJWXdXcxg1HonH+ugqxvgEickalzUggqyCosGIigegoBwqh3IfwzkMzNldz4t2CUE5xsD0APV94ecD1Az/GX5WV/VUdQMIIYYgvYPTXQAykKC4IAZAcUEMgOKCGADFBTEAigtigD6Oi0aj6dsnRExKX8aFIIjNmzdrtdo+fE7EpPRlXLKyssLDw9PS... | null | null | null | As shown in Figure 1<image_1>, there is a fixed baffle at the bottom of the inclined plane with an inclination angle of\(\theta\). One end of a light spring with a stiffness coefficient of k is fixed on the baffle, and the other end is connected to an object A with a mass of m. The object B is in contact with A (not co... | [
"When two objects A and B are separated, the acceleration is both\\(\\mu g \\cos\\theta + g \\sin\\theta\\)",
"There must be\\(x_1 < x_0\\)",
"When the acceleration of A is 0, the compression amount of the spring is\\(\\frac{\\mu mg \\cos\\theta + mg \\sin\\theta}{k}\\)",
"The maximum speed of B during exerci... | BD | 力学_牛顿运动定律 | phy |
52215156-1_27 | iVBORw0KGgoAAAANSUhEUgAAAWgAAAC2CAIAAAB7xIBpAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nMy9WbMkN44uCIB0j/0seXJRKiWVuqv69syUzbXbNvMwj/P/zebhvlRPl7ollUq5nH2L1d1JzAM30Jc4cVKpsonuUsbxoHMBAfADCJD4x//1/764uN5stojMjAAACMjsvoR//Yfj11CGAQEBgIEZkAEQ3GNXyoYXMdQFCMgIwIyADADIwIgA7pFvBZH9A0JARA4vI4ZvDL63jJw14V92z2K344BaQwxlszKxo2Hgvj9Z... | iVBORw0KGgoAAAANSUhEUgAAAQ4AAADPCAIAAACLEKhXAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOy9d3Mk2XUnem96U1neACgUvEejve+ZITXUDJ1IUaIctTIbG9p48eJ9CM7HWCNpdykp+J4clxT9kGN72hs0GkCj4T0KQBXK+8q874/MvHkzKwtAc4axuxHMmGkAVTev/Z1zfveckzchQgj85vrN9ZvrpIv6X92B31y/uf7PuJj/1R343+ja2d7a30/GuxM+n18QhBPLV6vV5N4uLwgeRZElmaIsvVMulXa2t+v1uiTL... | null | null | null | As <image_1><image_2>shown in the figure, when the comet moves to A, some dust particles are released, and they no longer move along the orbit of the comet. One view is that the radiant pressure generated by sunlight pushes them away radially. Suppose that the dust particles are all solid spheres, and all the sunlight ... | [
"The size of the radius R_0 is independent of the distance of the dust particles from the sun",
"The radius of dust particles moving along Aa path is greater than R_0",
"The radius of dust particles moving along the path of Ac is greater than R_0",
"The dust particle moving along the path of Ab is subjected t... | C | 近代物理_原子核 | phy |
52215155-1_12 | iVBORw0KGgoAAAANSUhEUgAAAQsAAADACAIAAACcb9HGAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dZ0AUV9fHd2a2L2XpvdhAEQFFEXt5FCQBjaBJLLEFYywxtmhMTOwxMWJirBg1RhElajRBfRPEEmNBLCggIIL0vtQt7O7szH0/TEIQYdm+szC/DwTDzp0zs/d/zz23nAsBAGgUFBQdABvbAAoKUkMphIJCGZRCKCiUQTe2AWQEAECEZ61/tgGCoNY/iV8ouh7dVCEtVR8AgOM48ZP4RaFQoCgql8tRFMUwDMdxFEXb... | null | null | null | null | As <image_1>shown in the figure, a static radon nucleus (^{222}_{86}Rn) decays in a uniform magnetic field perpendicular to the paper to release a certain particle to generate a new nucleus. The motion tracks of the new nucleus and the particle are two circumscribed circles on the paper. It is known that the ratio of t... | [
"The nuclear reaction equation is ^{222}_{86}Rn→^{222}_{87}Fr + ^0_{-1}e",
"The nuclear reaction equation is ^{222}_{86}Rn→^{222}_{85}At + ^0_{1}e",
"The nuclear reaction equation is ^{222}_{86}Rn→^{218}_{84}Po + ^4_2He",
"The great circle trajectory is that of the new nucleus, and the direction of the magnet... | B | 近代物理_原子核 | phy |
51541459-1_18 | iVBORw0KGgoAAAANSUhEUgAAAMMAAACxCAIAAAD29543AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO19d1xT1/t/7r2ZkEAII2xliDLEVUAF92zV6qfKx0EtrrpxYPuqOFC/WqXWUUVt1VbrR9uCL/tzfOqo0o9o3RZxIiobAmFDSEJyc8fvj6OIGZhFEvS+/xJz7hn3vs9znvM8z3kORJIkjQIFkwFbuwMU3hFQTKJgHlBMomAeUEyiYB5QTKJgHlBMomAemI1JBEGgKNrc3NyGWQEUIAhC668kSeI4LpVKdRWg0WgYhsnl... | null | null | null | null | As <image_1>shown in the figure, a small ball with a mass of $m$is suspended at point $O $with a light rope with a length of $l$. At the beginning, the small ball is still at point $P$. The first time, the small ball slowly moved from point $P$to point $Q$under the action of horizontal pulling force of $F_1$. At this t... | [
"In both processes, the tension on the light rope becomes larger",
"In the first process, the pulling force $F_1$is gradually increasing, and the maximum value must be greater than $F_2$",
"$F_{T1}=\\frac{mg}{\\cos\\theta}$，$F_{T2}=mg$",
"In the second process, the power of the resultant force of gravity and ... | BC | 力学_机械能及其守恒定律 | phy |
51541454-1_3 | iVBORw0KGgoAAAANSUhEUgAAAZsAAADaCAIAAAD/iXjSAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydZ1wUVxeHd2Z3ZvsusLvAsvQO0hFR6aBi7yaWaKyJJYktxqiJ3VijqaZrosbeFQUUBQS72KVI771u352574dJfI0NVJAF7/NFfzDM3Gn/OefeUxAAAA0CgUA6BWh7DwACgUBaDahoEAik8wAVDQKBdB6gokEgkM4DVDQIBNJ5gIoGgUBeHQBAXk7O6RPHNRpNe4+FBhUNAoG8FiRJ3r6ZtmPbH1qtxhBCwaCiQSCQ... | null | null | null | null | As <image_1>shown in the figure, objects $A$and $B$with a mass of $m$are connected by a light rope.$A$is worn on a fixed vertical smooth rod, and $B$is placed on a fixed smooth slope. The slope angle is $\theta= 30 ^\circ $. One end of the light spring is fixed to the baffle at the bottom of the slope, and the other en... | [
"When $A$moves from $N$to $M$, the work done by the pulling force of the rope on $A$is $\\sqrt{3}mgl-\\frac{1}{2}mv^2$",
"As $A$moves from $N$to $M$, the reduced mechanical energy of $A$is equal to the increased mechanical energy of $B$",
"When $A$moves to the $M$point, the speed of $B$is $\\frac{2\\sqrt{3}}{3}... | D | 力学_机械能及其守恒定律 | phy |
51541454-1_9 | iVBORw0KGgoAAAANSUhEUgAAAUcAAACnCAIAAAANGAkKAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOy9aYxcyX3gGfHyzsrMyrrvKtbFq4rFs0n2SbW6pW6pLUsDSFh5PGsbXu/MLtbjXdsfbCx2DH8yBvvBC6+BnQUWMxJGPZI1MkZSS31JVEvd7IPdzZusIosssu67MivvrDxjP+SLiP8/XrzMrGL1DGB0QupKvowXxz/+xy+OF48yxsjnn88/n3/+CX2M/9YV+Pzz+efzzz5/Prfqzz+ff/6pfT636s8/n3/+qX0+t+rP... | null | null | null | null | As <image_1>shown in the figure, the length of the horizontal part $ab$of the conveyor belt is $2m$, the length of the inclined part $bc$is $4m$, and the angle between $bc$and the horizontal direction is $37^\circ$. The conveyor belt moves clockwise in the figure at a uniform rate of $2m/s$. Now lightly drop the small ... | [
"When the small coal piece moves from point $a$to point $b$, the extra electricity consumed by the motor is $4J$",
"The time it takes for small coal to move from $a$point to $c$point is $2.4s$",
"During the movement from point $a$to point $c$, the heat generated by friction between the small coal and the belt i... | ABC | 力学_机械能及其守恒定律 | phy |
51541454-1_11 | iVBORw0KGgoAAAANSUhEUgAAAl4AAAERCAIAAAAlpT71AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd2DUVtLApe3V9nrXvXdj0w2m994JkNACpEF6u1y+u8uVXOrlklx6L4QQQkIJvXcChF4MNsa9G3vd1t5ib5O+P2SbXa20q23eNczvD5DfvnkaSaMZzdN7TyiO4wgAAAAAAF2wfK2AxzAYDG2trQa93teKAAAAAL2buyc0lhQV7d21s6K83NeKAAAAAL2buyQ0trW2njhy+NcN60uKCn2tCwAAANC78evQaNDrNRqN... | null | null | null | null | As <image_1>shown in the figure, the smooth track $ABC$consists of a vertical section $AB$, a $\frac{1}{4}$arc-shaped track $BC$with a radius of $R$, and a tangent line at the end $C$is horizontal. Immediately to the right end of $C$are the horizontal rough conveyor belts A and B and the horizontal rough ground, all of... | null | \frac{7}{5}\sqrt{\frac{R}{g}}\left(\frac{3\sqrt{5}\pi}{10}+4\sqrt{5}+2\right) | 力学_机械能及其守恒定律 | phy |
51541454-1_13 | iVBORw0KGgoAAAANSUhEUgAAAT4AAADqCAIAAAC0gr7qAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydZ2AURRvHd3b3+l1yufTeQyoJSQgQShAU6SIIKFVesGNBFEXA3rAhoqgoAgoKNkB6r9JDEmoI6SG9XsvdbZl5PywcKZdCckkucX8f4HJlZnZn/1OeeeYZgBDCeHh4uht4VxeAh4enLfDS5eHplvDS5eHplvDS5fkvghAyGo00TZttPRBCrVZjMhmbsv5QFKXVaCiKspiaobZWp9NBCJvPl6YovU7HsmwzBUMQUhSl... | null | null | null | null | As <image_1>shown in the figure, an ejection game device consists of a fixed catapult installed on a horizontal table, a water straight track $AB$, a vertical semicircular track $BCD$with a center of $O_1$, and a vertical semicircular pipe $DEF$with a center of $O_2$., a water straight track $FG$and elastic plates, etc... | null | The slider will not escape the track during the game, and the slider's final resting position is $0.4m$away from the elastic plate | 力学_机械能及其守恒定律 | phy |
51541454-1_16 | iVBORw0KGgoAAAANSUhEUgAAAbwAAABsCAIAAACem5ATAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2deVwbx/nwZ3ZX94k4Je77vjHGYBPfjp3DTZqradPcd9omfZukSXO1SXomvdtfmzTN1ebokTSxE8f3bWODDea+DwECJCTQjaTdnfcPISFAAoElEFjf5GOvV7MzzzO7+8yzM8/MQIQQCBIkSJAg3oEttwBBggQJspIIGs0gQYIEWQBBoxkkSJAgCyBoNIMECRJkAQSNZpAgQYIsgKDRDBIkSJAFEDSaQYIECbIACADA... | null | null | null | null | As <image_1>shown in the figure, a wooden board with a mass of $M=3kg$has a rough $AB$section on its upper surface and a length of $L=3m$, and a smooth $BC$section. There is a mass $P$(which can be used as a particle) with a mass of $m=1kg$on the far left end of the board, which slides to the right on a smooth horizont... | null | 2.4J | 力学_机械能及其守恒定律 | phy |
51541454-1_22 | iVBORw0KGgoAAAANSUhEUgAAAUEAAACoCAIAAADxUMuYAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd3wUxfvHd7ZcyyWX3nsPCYQQOiIlgCCKCCKoiAX1p9iVol/7FxEQULELfhU7nUCoUkITDL2EFpIQUiC9XZJruzO/Py7lcrlc9pLL3V6Yt6+XXO52Z58pn31mZ+eZAQghAoPBOCykvQ3AYDBdAmsYg3FssIYxGMcGaxiDcWywhjEYxwZrGINxbLCGMRjHBmsYg3FssIYxGMeG5nnc/j27CwryEbTlpC6ECIJAxhPJ... | null | null | null | null | As <image_1>shown in the figure, the pipe with smooth inner wall consists of upper and lower horizontal pipes and a semicircular pipe in the vertical plane. The radius of the semicircular pipe is $R$. The horizontal pipe and the semicircular pipe are just tangent. The two small balls in the pipe $A$and $B$are connected... | [
"The speed of the small ball $A$when it first enters the horizontal pipe below is $\\sqrt{2gR}$",
"Before the ball $A$enters the horizontal pipe below, the work done by the rope pulling force on the ball $B$is $\\frac{1}{2}mgR$",
"If the rope length is changed to $l=\\frac{\\pi}{2}R$, the speed of the small bal... | AD | 力学_机械能及其守恒定律 | phy |
51541454-1_35 | iVBORw0KGgoAAAANSUhEUgAAANIAAADgCAIAAAD5Sa+zAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd0AUxxfHd3b3eoOj995UBOlg77333ksssUWN0cTEaDT23jX+jLGjRmPXaBS7WBBEBOkdDrhed+f3xykhCnrAHRx4nz9S7rjd2d3vvpl58+Y9ACFETJioW9D6boCJLxGT7EzUAybZmagHTLIzUQ+YZGeiHsCr+iIl+U1ifAKEZN22x0SDhMFkRrRsyeFwdfz7KmX3+P797Zs2kmRtZQchlMtlkCQZTCaKYrU8WsME... | null | null | null | null | As <image_1>shown in the figure, a ring with a radius of $R$is fixed in the vertical plane, with the center of the circle being $O$, and $O_1$and $O_2$are two light fixed pulleys, of which $O_1$is at $2R$directly above the $O$point. The light rope that crosses the fixed pulley has one end connected to the small ball $P... | [
"During the movement from the lowest $P$point to the $E$point, the mechanical energy of $P$first increases and then decreases",
"When $P$first starts to move, the tension on the rope is greater than $mg$",
"When $P$moves to the $F$point equal to the center of the circle, the ratio of the velocity of $P$to $Q$is... | D | 力学_机械能及其守恒定律 | phy |
51541454-1_41 | iVBORw0KGgoAAAANSUhEUgAAAkAAAADJCAIAAABE2BpYAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd2AURRfAd3b3+uUul+TSe0gh9BZ6r9IEAQXFD1FAKQJSpaM0pSOKiKJiQXoPvffeSwiBVEJ6u363u/P9sclxuXS4XEnm94eGm93ZtzOz86a89wZACDEEAoFAIBwN3NYCIBAIBALxJiAFhkAgEAiHBCkwBAKBQDgkSIEhEAgEwiFBCgyBQCAQDglpawFqKRBCmqIUCkVSQvyDe/cUBfkNmzSt36iRWCwmCFQpCAQC... | null | null | null | null | As <image_1>shown in the figure is a schematic diagram of a certain track. The lower end of the quarter-arc track $AB$with the center of $O_1$is tangent to the horizontal track $BC$at point $B$. The upper end of the quarter-arc track $EF$with the center of $O_2$is tangent to the horizontal track $DE$at point $E$. There... | null | The relationship between the heat generated by friction between the slider and the conveyor belt and $v$is: when $v>\sqrt{14}~m/s$, the frictional heat is $(\sqrt{14}-3)v-2.5(J)$; when $2m/s\leqslant v\leqslant\sqrt{14}~m/s$, the frictional heat is $\frac{(3-v)^2}{2}(J)$; when $v<2m/s$, the frictional heat is $(2.5-v)J... | 力学_机械能及其守恒定律 | phy |
51541454-1_42 | iVBORw0KGgoAAAANSUhEUgAAAfgAAAC9CAIAAADQqPhDAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOxddWAUR/ue2XOLu4d4QpAAwaW4S7EWp1C8SGmpfbXf19KvFIpDodAWaLHiVtwhWAguISQhxD2X5Hx3fn/srdzlklwCBUrn+YTLyuzIM8+87zszuxAhBDAwMDAwXl8QLzsDGBgYGBh/L7DQY2BgYLzmwEKPgYGB8ZpD+LIzgIGBgYFRLYoKCw/s2W11UCgUunt6xjRs6OPnB2Ht9joWegwMDIxXF+qysvz8vIRz59JS... | null | null | null | null | As <image_1>shown in the figure, the vertically placed spiral circular track $BGEF$with a radius of $R=0.2m$is smoothly connected to the water straight tracks $MB$and $BC$, and the inclined plane $CD$with an inclination angle of $\theta= 30\circ $is smoothly connected to the straight track $BC$at $C$. The horizontal co... | null | The range of bevel height $H$is $0.7m\leqslant H\leqslant 0.8m$. | 力学_机械能及其守恒定律 | phy |
50870667-1_24 | iVBORw0KGgoAAAANSUhEUgAAAOcAAAB1CAIAAAA6OGE/AAAACXBIWXMAAA7EAAAOxAGVKw4bAAASIUlEQVR4nO2deXwUZZrH663quztJ507nBCIixyoh4AGEWy4vBtB1cESUwUFHZdTPsu7H0XE+O+vqqOOBq+M1OqIiMCvgCcrh6IYISkiIEEIg5GjS6aTvu7uq3mf/qBBjkk66k053VfJ+/0qq36r3qff9vc971vsiAKD6ZcAAoxhEUYNLnEHfmFjCmx3fF6LjF5UkQFGFHnRGiVmy/SRBeLPj+kKIqPbniFlOvYmujEWI+JMARoxq... | iVBORw0KGgoAAAANSUhEUgAAAQIAAADzCAIAAADilI8PAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd3wURf/HZ3b3ekvu0nsvEAiEHggdpEoHRaQJ6oNgxd575fmpPBZE8AEU9KFIhwCiQIAkBEhCSw/pufTkcv125/fHQgiQci3lwrxfgnp3u/vd3fnMfGfmO9+BCCGAwTzYEF1tAAbT9WAZYDBYBhgMlgEGg2WAwQAsAwwGYBlgMAAAQNl4PE3TBTfzVfUNACAAAIDw1hfo1h8IoYeXt4urK0FgyWG6KbbKAACwY+uW... | null | null | null | Two identical molecules A and B with both masses m are released from rest from the origin of coordinates on the x axis and at $r_1$, as shown in Figure A<image_1>. Figure B <image_2>is an image of the molecular potential energy of these two molecules changing with the distance between molecules. When the distance betwe... | [
"When molecule B reaches the coordinate $r_0$, the molecular force between the two molecules is zero",
"The maximum kinetic energy of molecule B is $E_1 - E_0$",
"As the two molecules are released from rest to infinite distance, the molecular potential energy between them first decreases, then increases, and th... | D | 热学_分子动理论 | phy |
50220046-1_2 | iVBORw0KGgoAAAANSUhEUgAAAgQAAADtCAIAAABPtPqiAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2ddXwT5xvA7+JpUnd3F9zd3WGw4cN9jDFjrr/5sAFjjMEc2ZANGLphw62lQFuou6QSTy73++PaI03uLpc2aUr3fD/7jOa9V5737n2f5/UXxXEcAQAAAP7bcBwtAAAAAOB4wBgAAAAAYAwAAAAAS8YAphMAAAD+EzAbA7TF5AAAwB6UlpQ8epil0+kcLQjQ2oFhIgBos2AY9tueX/f8+INCLne0LEBrB4wBALRZ0tNS... | iVBORw0KGgoAAAANSUhEUgAAATsAAADhCAIAAAA4bIVtAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd1wUZ/7HZ7Y3lmV3aUvvsDRBmnRRsRux10STaBLTLuVSL3fJL+1yl3Lp0WhiYks09oogRURQAVEp0nvvsH13Zn5/LKzL9oWFZXXer3td5JmnfGf2+Ty9gAiCACgoKBYCxtwGoKCgGAGqWBQUSwJVLAqKJYEqFgXFkkAVi4JiSaCKRUGxJFDFoqBYEqhiUVAsCVSxKCiWBKpYFBRLAmduAyYLgiAymQyCIIULFoPB... | null | null | null | The experimental team used the <image_1>device shown in Figure 1 to study the movement of electrons between parallel metal plates. Place the radioactive source P close to the speed selector. The magnetic induction intensity in the speed selector is B (inward perpendicular to the paper), and the electric field intensity... | [
"The rate of electrons passing through the speed selector in a straight line is $\\frac{E}{B}$",
"By only increasing the electric field intensity E in the speed selector, the time for electrons injected along the central axis to pass through the plates becomes longer",
"If $t=\\frac{T}{4}$at the moment, the ele... | AD | 电磁学_磁场 | phy |
50220046-1_20 | iVBORw0KGgoAAAANSUhEUgAAAWoAAADnCAIAAAC444sGAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOyddXQU19vH587MzvpuduPuRgQnuAV3pxQKFGuBGqVvlVKhLS01Skup0PbX0uLu7gSCBA9JiLtn3Wbm3vePCSFAAgECuwnzORxOzqw9Ozv3O/c+9xGAEMJ4eHh4Hh7c3gbw8PA0VXj54OHheUR4+eDh4XlEePng4eF5RHj54OHheUTIWn9zWzAAwxCGgVpHagOemmU8d4EQYhjGbDJpNFWaqqqCvLysjIysjIzMjPSS... | iVBORw0KGgoAAAANSUhEUgAAAWIAAADGCAIAAABnxB1hAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd3gU1frHzzkzsy1b0nsBUiCEFHovAtLtil4Lem3XXgDbT0WuiFcECyoWRAVFRARBepceegtppBFCejbJZvvuzDm/PyasIQlJvEnI7tzzeXx8HiZnd97Zmfme97znfc+BhBBAoVAo1wd1tQEUCsXdoTJBoVBagcoEhUJpBSoTFAqlFahMUCiUVqAyQaFQWoHKBIVCaQXPlglCSBfkfRDyt85LM1Monk4nygQhBGPc... | iVBORw0KGgoAAAANSUhEUgAAAFkAAAC5CAIAAADMLQR6AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAOBUlEQVR4nO2deXwU1R3A35trr+xujt3cEQiWkIQrch/KpbVUQT4gaotHaRVpBREtamu1rdrWatVa/dQW7QfqR5CKR5EqCGgqUChXLpJgCkk25M4m2U32mJ3Zmff6x0BeGkjYJexmoe/7+eSPTGZ23nznvd97k33vNxBjDCgAAACYoS5ADEFdEKgLAnVBoC4I1AWBuiBwYe2NEUIYA21IArUfDLTfGIZhYs4sPgvSCgkgPLsVAAZC... | null | null | Figure A <image_1>shows a schematic diagram of a cyclotron. The core part is two D-shaped boxes. There is a uniform magnetic field in the D-shaped boxes, and the direction is perpendicular to the paper and inwards. The magnetic induction intensity is $B_1=1T$. A high-frequency AC power supply is connected between the t... | null | The maximum kinetic energy that the extracted particle can obtain is $6\times 10^6eV$. | 电磁学_磁场 | phy |
50220046-1_26 | iVBORw0KGgoAAAANSUhEUgAAAVkAAAD2CAIAAADzrWMDAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOyddXgU1xqHZ2Zdsxp39xAjCQkhBHd3KO4tVkpbqlSgBsUKhUIpUqC4QyBBgschEOJuu9nNWtZH7h/T5oYIhEAM9n363Ocyc2b27Gbmd875zicghmGACRMm3nmgzu6ACRMmugQmLTBhwgRg0gITJkz8i0kLTJgwAZi0wIQJE/9i0gITJkwAAAAQX3gWAwAQAJpuOoLt2CMTJloHiqIatdpgMBiNRgiCyBQKjUYjk8md... | null | null | null | null | As <image_1>shown in the figure, it is a model of the electromagnetic water pump. The pump body is a rectangular body with a side length of $L_1$, and the left and right sides are squares with a side length of $L_2$. After adding conductive agent into the pump body, the resistivity of the liquid is ρ, and the uniform m... | [
"The upper surface of the pump body should be connected to the positive pole of the power supply",
"Electromagnetic pump can pump pure water without adding conductive agent",
"The total power supply provides is $I^2\\frac{\\rho}{L_1}$",
"If the mass of water extracted during time t is m, the kinetic energy of... | AD | 电磁学_磁场 | phy |
50220044-1_1 | iVBORw0KGgoAAAANSUhEUgAAAZsAAAELCAIAAACAnLzsAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOydd1gUxxvHd3b3+sHRe1WKiCDYFRXE3nuN5adRY9fYEnsvUbHX2KNGjcZeYu+9K2JDejv6cRx3t2Xm98cqIQgKB8qp+3me+BC43Zvbm/3uO++8BSCEMB4eHp5vAryiB8DDw8NTbvCKxsPD8+3AKxoPD8+3A69oPDw83w68ovHw8Hw78IrGw8Pz7cArGg8Pz7cDr2g8PDzfDryi8fDwfDuQpT+EyzEAH/yAYRhG00yO... | null | null | null | null | <image_1>An electron induction accelerator is a device that uses an induced electric field to accelerate electrons. Its basic principle is shown in Figure A. The upper part of the figure is a side view. The upper and lower parts are the two magnetic poles of the electromagnet. There is an annular vacuum chamber between... | [
"The acceleration of the electron as it moves always points to the center of the circle",
"The electrons in $\\frac{T}{4}~\\frac{T}{2}$in Figure B can move in a circle in the counterclockwise direction in Figure A and be accelerated",
"The electrons in $\\frac{3T}{4}~T$in Figure B can move in a circle in the co... | D | 电磁学_电磁感应 | phy |
49908648-1_3 | iVBORw0KGgoAAAANSUhEUgAAAQgAAACiCAIAAAAyZMSUAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO1dZ2ATxxK+O0mWLLlXjAumY2zTjakBTAmhQ4BQQ4cQWiimN9M7ISGBFEIChB5CCqEFCGCKAVMCxg0bY1vuVb3c7b4fZwlZVjmdTrKcx/cDZGl3dmZ2Z8vs7C4KIUTe4R3eoTqw2mbgHd7BEfHOMN7hHQzgnWG8wzsYwDvDeId3MIB3hvEO72AA7wzjHd7BANi1zcA72AQAQAAIBEFYLBaKogiCQAgBABBC7TfvYAJU... | null | null | null | null | An athlete jumps horizontally from a ski jumping platform at different speeds of $v_0$to a slope with an opposite inclination of 45° (as <image_1>shown in the figure). It is known that the height of the jumping platform is h, regardless of air resistance, and the acceleration of gravity is g, then the following stateme... | [
"If the athlete falls on the slope with the shortest displacement, the time spent in the air is $\\sqrt{\\frac{h}{2g}}$",
"If the athlete falls on the slope at a speed perpendicular to the slope, the time spent in the air is $\\sqrt{\\frac{2h}{3g}}$",
"If the athlete falls to a certain position on the slope at ... | BD | 力学_曲线运动 | phy |
52634719-1_2 | iVBORw0KGgoAAAANSUhEUgAAAVUAAADgCAIAAAA8HmILAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nOy9d3ycxbU+fs7M+27Xqqx6sSQ32ZZt4YJ7xQ0bYxzTSyCEklwSIOSmkEt+v3BvcuEmkFyCbyBxAgkETDHNwcYYsA3u3bh32ZJVrN617Z053z9mdy13y5as1bIPH2z51bu7s+/7PjPnnDnnOUhEEEUUUXwjwbp6AFFEEUWXQevqAbQDylRBRCJCxLYHFUIHu2psoRG2/VUXjiqKKC6M7rT+E5HP5ysrK/P7/W2PCyFa... | null | null | null | null | As autonomous driving technology continues to mature, unmanned vehicles have successively entered specific roads for experiments. As shown in the figure<image_1> is a moving $v-t$image of two unmanned cars starting from the same place at the same time on a horizontal straight road. There is no collision during the move... | [
"At 4 seconds, the distance between the two unmanned cars was 6 meters",
"At 2.5s, the unmanned car A returned to the starting point",
"At 2.5 seconds, the acceleration directions of unmanned vehicles A and B are opposite.",
"In the first 2 seconds, the acceleration of A is always greater than the acceleratio... | D | 力学_匀变速直线运动 | phy |
52634719-1_2-7 | iVBORw0KGgoAAAANSUhEUgAAAOYAAADwCAIAAACbh49qAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd1gUVxeH585sp0kXpBfFhoqAiB+KogZsKCqiYmxEbAEVFTUaNRZsRCwJ9lhRREXEhkTBgqiAxIZUaUrvZdky5ftjkg0xiVlkgV2875PHJ87OzL3r/PbMueeeey6gKAqBQBQHtKM7AIG0DChZiIIBJQtRMKBkIQoGlCxEwYCShSgYULIQBYMhw3sRBFFdXa2lpfXp08Ri8du0tMzMzNx376ZMnWpiakoQRHxcXEpK... | null | null | null | null | The two carriages A and B with sensors moved from the same position and in the same direction at the same time. Data processing was carried out by the computer, and their $\frac{x}{t}-t$images were obtained, as <image_1>shown by the straight lines A and B in the figure. It is known that two carriages can be regarded as... | [
"Both cars A and B perform uniform acceleration and linear motion",
"A The acceleration of the trolley is $6 \\, \\text{m/s}^2$",
"The maximum distance between the two small workshops before the encounter is $4 \\, \\text{m}$",
"In the 2nd, two cars A and B met"
] | BC | 力学_匀变速直线运动 | phy |
52634719-1_3-2 | iVBORw0KGgoAAAANSUhEUgAAAK4AAAB7CAIAAABinSwlAAAACXBIWXMAAA7EAAAOxAGVKw4bAAATJUlEQVR4nO2dezxU2QPAz53BjMdMJY+8CiE91PYglUcP2V6k15bY2lK22mrbStkttbWtTdoo6leRRN7kGVIqEQkh1fZ+GCYSYjDPO+f3x7W2UCFmmM7344+595575xz3O+d1zzkXgxACBAIAkrgjgOgtIBUQzUiJOwII0dFSGcAwrO1RpIJkUldXFxwUpKio+P49f/26Iioywj8gYOSoUW1PwVC1UVLh8/nS0tItm6WvXk21MFu5... | iVBORw0KGgoAAAANSUhEUgAAAJkAAADJCAIAAAC/sAcaAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd1gUV/fH753tLOyyLL13pCnYsAPGmqiJRiWWGBONvikaUzTtNTFv8ksztsQWUzQaa4wmGuwasUbFAhYQBOlll7KU7TNzfn8MEkRByu6ywnweHx/mTrln5zv3zrntDAYAxNIpIDraABaTwWrZeWC17DywWnYeWC07D6yWnQdWy84Dq2XngdWy88Bq2Xlgtew8sFp2HjpAS6VSuXnTpqnPJRQVFakqK99asODzzz5j... | null | null | null | As shown in Figure (a)<image_1>, a sufficiently long slope with an inclination angle of $\theta$is placed on a rough horizontal surface. Small objects A and B of equal mass slide down the inclined plane at an initial speed of $v_0$at the same time. The dynamic friction coefficients of A and B and the inclined plane are... | [
"$\\mu_1 + \\mu_2 = 2 \\tan \\theta$",
"When $t = t_0$, the speed of the armor is $3v_0$",
"Before $t = t_0$, the friction force on the slope faces to the left",
"After $t = t_0$, the frictional force on the slope faces to the left"
] | AD | 力学_匀变速直线运动 | phy |
49831269-1_2-13 | iVBORw0KGgoAAAANSUhEUgAAAQEAAAC9CAIAAAA88V8QAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAgAElEQVR4nO2dd1xUR9fH773be1+WIr2oqGCLLYBRsaKxxRYLtoiJUWOJMcZY8iZ5Hn2M3URjjRor9qjYEDsWREAFC4ggfWF7u+39Y3QlVlRgd+F+P/41Xmbnlt/MnDNnzsAkSUIUFPUYxNENoKBwMJQGKOo7lAYo6jt1SgMkSVLmDcW7Unc0QBAEiqIajQbDMEe3hcKVqCMaIEnSbDZfvHjxk08+OXHihF6vp5RAUUXgOjB5IEnS... | null | null | null | null | As <image_1>shown in the figure, the upper end of a smooth guide rail with an inclination angle of $\theta$and a spacing of $d$is connected to a coil with a self-inductance coefficient of $L$. There is a uniform magnetic field with a magnetic induction intensity of $B$in the space perpendicular to the plane of the guid... | [
"The amplitude of the simple harmonic motion of the conductor rod is $\\frac{mgl\\sin\\theta}{2B^2d^2}$",
"The maximum current in the loop is $\\frac{2mg\\sin\\theta}{Bd}$",
"The maximum kinetic energy of the conductor rod is $\\frac{m^3g^2L\\sin^2\\theta}{2B^2d^2}$",
"The period of simple harmonic motion of ... | BCD | 电磁学_电磁感应 | phy |
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