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sql can be a beautiful thing , but it can also be a dangerous thing . if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to... | whenever we issue a command like create , update , insert , or delete , we are automatically starting a transaction . however , if we want , we can also wrap up multiple commands inside a bigger transaction . it may be that we only want an update to go through if another update goes through as well , so we want to put ... | if i want to implement a database on a site what do i need now ? |
sql can be a beautiful thing , but it can also be a dangerous thing . if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to... | if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to make your sql safer , however . avoiding bad updates/deletes before y... | i think i get that i have to install sqlite or mysql , or etc , on my computer ; but then , is sql a type of file like `` info_colected.sql '' ? |
sql can be a beautiful thing , but it can also be a dangerous thing . if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to... | if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to make your sql safer , however . avoiding bad updates/deletes before y... | do i have to add a script page to my site to make the queries get in the file ? |
sql can be a beautiful thing , but it can also be a dangerous thing . if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to... | we also use transactions when we want to make sure that all of our commands operate on the same view of the data - when we want to ensure that no other transactions operate on that same data while the sequence of commands is running . when you 're looking at a sequence of commands you want to run , ask yourself what wo... | can someone show me the steps i would have to take ? |
sql can be a beautiful thing , but it can also be a dangerous thing . if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to... | when something bad happens , they can then import data from the old database for whichever tables were damaged or lost . the data may end up a little outdated , but outdated data is often better than no data at all . replication a related approach is replication - always storing multiple copies of the databases in diff... | is there any way to encrypt sensitive data , such as passwords ? |
sql can be a beautiful thing , but it can also be a dangerous thing . if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to... | when something bad happens , they can then import data from the old database for whichever tables were damaged or lost . the data may end up a little outdated , but outdated data is often better than no data at all . replication a related approach is replication - always storing multiple copies of the databases in diff... | how do we store data in multiple locations and having the systems to look up in all of those ? |
sql can be a beautiful thing , but it can also be a dangerous thing . if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to... | when something bad happens , they can then import data from the old database for whichever tables were damaged or lost . the data may end up a little outdated , but outdated data is often better than no data at all . replication a related approach is replication - always storing multiple copies of the databases in diff... | do khanacademy replicates or store data on multipale servers ? |
sql can be a beautiful thing , but it can also be a dangerous thing . if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to... | for example , before running : update users set deleted = true where id = 1 ; you could run : select id , deleted from users where id = 1 ; once you decide to run the update , you can use the limit operator to make sure you do n't accidentally update too many rows : update users set deleted = true where id = 1 limit 1 ... | yes what is the acid principles more defined ? |
sql can be a beautiful thing , but it can also be a dangerous thing . if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to... | for example , before running : update users set deleted = true where id = 1 ; you could run : select id , deleted from users where id = 1 ; once you decide to run the update , you can use the limit operator to make sure you do n't accidentally update too many rows : update users set deleted = true where id = 1 limit 1 ... | what are the acid principles ? |
sql can be a beautiful thing , but it can also be a dangerous thing . if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to... | as a general rule , there should be only a few users that have full access to the database ( like backend engineers ) , since it can be so dangerous . for example , here 's how we can give full access to a particular user : grant full on table users to super_admin ; and here 's how we can give only select access to a d... | i noticed sometimes the word table is put in front of the table name in some query/transactions and sometimes it 's not ... does it have to be a certain way for certain queries/transactions or is it up to the user to type it or not ? |
sql can be a beautiful thing , but it can also be a dangerous thing . if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to... | avoiding bad updates/deletes before you issue an update , run a select with the same where to make sure you 're updating the right column and row . for example , before running : update users set deleted = true where id = 1 ; you could run : select id , deleted from users where id = 1 ; once you decide to run the updat... | in the `` avoiding bad updates/deletes '' section , why is it delete users where id = 1 limit 1 ; ? |
sql can be a beautiful thing , but it can also be a dangerous thing . if you 're using sql to access a database for an app that 's used by hundreds or thousands or even millions of users , you need to be careful - because you could accidentally damage or erase all that data . there are various techniques you can use to... | as a general rule , there should be only a few users that have full access to the database ( like backend engineers ) , since it can be so dangerous . for example , here 's how we can give full access to a particular user : grant full on table users to super_admin ; and here 's how we can give only select access to a d... | in the privileges section , would n't giving a certain user full access to the app make the user able to make it his.her own image ? |
key points : some prokaryotes are phototrophs , getting energy from the sun . others are chemotrophs , getting energy from chemical compounds . some prokaryotes are autotrophs , fixing carbon from $ \text { co } _2 $ . others are heterotrophs , getting carbon from organic compounds of other organisms . prokaryotes may ... | c. botulinum , the bacterium that causes botulism ( a form of food poisoning ) when it grows in canned food , is an obligate anaerobe – which is why it multiplies well inside of sealed cans. $ ^4 $ facultative anaerobes use aerobic metabolism when $ \text o_2 $ is present , but switch to anaerobic metabolism if it 's a... | so , examples of chemoautotrophs are sulfur , hydrogen , and nitrifying bacteria , and examples of photoheterotrophs are rhodobacter , chloroflexus , and both green and purple nonsulferic bacteria ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . this function is automatically called whenever the mouse is dragged . | why do we need the draw function in the above program ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | in the last program , var node = nodes [ n ] does this means the changes in content of node will lead to changes in content of nodes [ n ] ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | does not a duplicate array node is created independent of nodes [ n ] by above mentioned assignment statement & changes are made to it independently ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | this function is automatically called whenever the mouse is dragged . mousedragged = function ( ) { rotatey3d ( mousex - pmousex ) ; rotatex3d ( mousey - pmousey ) ; } ; mousex and mousey are built-in variables that contain the current position of the mouse . pmousex and pmousey are built-in variables that contain the ... | what is the difference of mousex and pmousex ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . this function is automatically called whenever the mouse is dragged . | why did n't we use rotatez3d in mousedragged ( ) ; function ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = 0 ; n & lt ; nodes.length ; n++ ) { var node = nodes [ n ] ; var x = node [ 0 ] ; var z = node [ 2 ] ; node [ 0 ] = x * cos... | how do i change the focus of view ( fov ) of the objects being rendered ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | try using the number scrubber to change the values in the function calls . user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . | how to fill a cube ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | if we imagine looking down on our cube as we rotate it around the y-axis , what we would see is a rotating square , just like we do when we rotate about the z-axis . we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinate... | can i draw 3d objects without z axis ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | what dose `` pmouse '' mean ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | what if we want to rotate our cube around the y-axis ( vertical axis ) ? if we imagine looking down on our cube as we rotate it around the y-axis , what we would see is a rotating square , just like we do when we rotate about the z-axis . we can take our trigonometry and function from before , and just re-label the axi... | just wondering , is this how 3d modeling programs like blender and maya are made ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | hi , may i ask why changed node [ 2 ] s are not needed for drawing the after-rotation edges ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | if we imagine looking down on our cube as we rotate it around the y-axis , what we would see is a rotating square , just like we do when we rotate about the z-axis . we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinate... | how can those edges form a complete 3d shape without considering the changes on the z-axis ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | this function will loop through all the nodes in the node array , find its current x and y coordinates and then update them . we store sin ( theta ) and cos ( theta ) outside the loop so we only need to calculate them once : var rotatez3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ... | what is `` theta '' ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | try using the number scrubber to change the values in the function calls . user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . | how would you make a cube that is filled in ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we store sin ( theta ) and cos ( theta ) outside the loop so we only need to calculate them once : var rotatez3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = 0 ; n & lt ; nodes.length ; n++ ) { var node = nodes [ n ] ; var x = node [ 0 ] ; var y = node [ 1 ] ; node ... | is there a way to rotate the shapes around the z-axis using the mouse ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | try using the number scrubber to change the values in the function calls . user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . | this is really helpful , but is it possible to fill the sides of the shape as so to make a solid cube ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | i see where it finds each node via nodes [ n ] , but where does it assign new values to each one ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | when rotatez3d ( angel ) is excuted seperately , it looks a rotating square ; when rotatey3d ( angel ) is excuted seperately , it looks a square moving left and right ; when both are excuted , it could look just a cube , why is that ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | try using the number scrubber to change the values in the function calls . user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . | why rotatez3d ( angel ) and rotatex3d both are excuted , it could look just a cube ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . this function is automatically called whenever the mouse is dragged . | how come the rotatez3d ( ) function is n't included in the mousedragged function ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | what if we want to rotate our cube around the y-axis ( vertical axis ) ? if we imagine looking down on our cube as we rotate it around the y-axis , what we would see is a rotating square , just like we do when we rotate about the z-axis . we can take our trigonometry and function from before , and just re-label the axi... | how would you add perspective , so that farther away objects look smaller ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | this function is automatically called whenever the mouse is dragged . mousedragged = function ( ) { rotatey3d ( mousex - pmousex ) ; rotatex3d ( mousey - pmousey ) ; } ; mousex and mousey are built-in variables that contain the current position of the mouse . pmousex and pmousey are built-in variables that contain the ... | it says that rotate by x-axis 30 degrees , we use rotatex3d ( 30 ) ; but why rotatey3d ( mousex - pmousex ) ; ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | this function is automatically called whenever the mouse is dragged . mousedragged = function ( ) { rotatey3d ( mousex - pmousex ) ; rotatex3d ( mousey - pmousey ) ; } ; mousex and mousey are built-in variables that contain the current position of the mouse . pmousex and pmousey are built-in variables that contain the ... | does not `mousex - pmousex ' mean distance between mousex and pmousex ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | pmousex and pmousey are built-in variables that contain the position of the mouse in the previous frame . so if the x-coordinate has increased ( we move the mouse right ) , we send a postive value to rotatey3d ( ) and rotate the cube counter-clockwise around the y-axis . you can see for yourself below . | for the last program , why does the cube move towards the top-left corner when i change any line of code ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | this function will loop through all the nodes in the node array , find its current x and y coordinates and then update them . we store sin ( theta ) and cos ( theta ) outside the loop so we only need to calculate them once : var rotatez3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ... | in the first program example i put this printlns for understanding : rotatez3d ( 45 ) ; println ( node0 [ 0 ] ) ; println ( node0 [ 1 ] ) ; println ( node0 [ 2 ] ) ; and got this values : -1.4210854715202004e-14 -141.4213562373095 -100 why the first value is not 0 ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | this function will loop through all the nodes in the node array , find its current x and y coordinates and then update them . we store sin ( theta ) and cos ( theta ) outside the loop so we only need to calculate them once : var rotatez3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ... | var x = 100 ; var y = 0 ; think that to calculate polar to cartesian coordinate we only need var origin = sqrt ( x * x + y * y ) ; then , var nx = origin * cos ( theta ) ; // this is new x location after rotate theta var ny = origin * sin ( theta ) // this is new y location after rotate theta can i use this method to r... |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | but we used z value in rotatey3d , rotatex3d functions ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | this requires some slightly more advanced trigonometry . if we call the distance between the point ( x , y ) and the origin $ r $ , and the angle between the line to ( x , y ) and x-axis $ α $ , then : $ x = r × cos ( α ) \ y = r × sin ( α ) $ if we rotate by β to point ( x ' , y ' ) , then : $ x ' = r × cos ( α + β ) ... | in this line can we use sqr ( origine ) = sqr ( x ) + sqr ( y ) ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | this function will loop through all the nodes in the node array , find its current x and y coordinates and then update them . we store sin ( theta ) and cos ( theta ) outside the loop so we only need to calculate them once : var rotatez3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ... | why is it you do n't need to translate the canvas and then redraw the box at ( 0,0 ) like with the first rotation tutorial ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | why is sometimes an optical illusion created in the rotating cube so that it looks as if it is rotating opposite the direction it usually should ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | if we call the distance between the point ( x , y ) and the origin $ r $ , and the angle between the line to ( x , y ) and x-axis $ α $ , then : $ x = r × cos ( α ) \ y = r × sin ( α ) $ if we rotate by β to point ( x ' , y ' ) , then : $ x ' = r × cos ( α + β ) \ y ' = r × sin ( α + β ) $ using some trigonometric iden... | anyone know how to order which shape goes first if each shape is defined by more than 1 set of coordinates ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | using simple trigonometry we can find that the position of the point after rotating it by θ around the origin is : $ x ' = x \times cos ( \theta ) $ $ y ' = x \times sin ( \theta ) $ if you do n't understand where these equations came from , this video might help . rotating a point about the origin the example above al... | how do you scale something on its own origin ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | try using the number scrubber to change the values in the function calls . user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . | how do you make the cube smaller ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | how do one make a first-person perspective from a specific location ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | if we call the distance between the point ( x , y ) and the origin $ r $ , and the angle between the line to ( x , y ) and x-axis $ α $ , then : $ x = r × cos ( α ) \ y = r × sin ( α ) $ if we rotate by β to point ( x ' , y ' ) , then : $ x ' = r × cos ( α + β ) \ y ' = r × sin ( α + β ) $ using some trigonometric iden... | the same with the nodes : why 7 nodes , if a cube needs 8 ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | is there no other way to make 3d shapes without learning trignometry ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | try using the number scrubber to change the values in the function calls . user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . | is there any way to set a fill color for the cube ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | what if we want to rotate our cube around the y-axis ( vertical axis ) ? if we imagine looking down on our cube as we rotate it around the y-axis , what we would see is a rotating square , just like we do when we rotate about the z-axis . we can take our trigonometry and function from before , and just re-label the axi... | like when it seemed to be just a square rotating in circles ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | this function is automatically called whenever the mouse is dragged . mousedragged = function ( ) { rotatey3d ( mousex - pmousex ) ; rotatex3d ( mousey - pmousey ) ; } ; mousex and mousey are built-in variables that contain the current position of the mouse . pmousex and pmousey are built-in variables that contain the ... | what does pmousex and mousey mean ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . this function is automatically called whenever the mouse is dragged . | how can i change the rate of mousedragged rotation ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | is there a specific line of code i could use ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . this function is automatically called whenever the mouse is dragged . | is there someone who could show me a function that i could use to make rotating 3d objects ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | i know this is kinda late but can i get a brief explanation of what a node does and is ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | rotating a point about the origin the example above allows us to rotate a point that starts on the x-axis about the origin , but what if it is n't on the x-axis ? this requires some slightly more advanced trigonometry . if we call the distance between the point ( x , y ) and the origin $ r $ , and the angle between the... | seriously , i 'm in 7th grade and i need to learn trigonometry to draw 3d shapes ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | this function is automatically called whenever the mouse is dragged . mousedragged = function ( ) { rotatey3d ( mousex - pmousex ) ; rotatex3d ( mousey - pmousey ) ; } ; mousex and mousey are built-in variables that contain the current position of the mouse . pmousex and pmousey are built-in variables that contain the ... | rotatey3d ( pmousex - mousex ) ; rotatex3d ( pmousey - mousey ) ; why does this work ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | how do you color the sides of a 3d shape ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | i did n't understand how inside rotation function changes in node results in the change in content of nodes0 ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | try using the number scrubber to change the values in the function calls . user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . | how do you rotate a shield by using interaction ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | node [ 0 ] = x * costheta - y * sintheta ; node [ 1 ] = y * costheta + x * sintheta ; why node [ 0 ] and node [ 1 ] ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | what is the significance of the 0,1 , and 2 used in the rotate x , y , z 3d functions for var x and var y in lines 37/38 , 50/51 , and 63/64 ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | how does changing the value of z in the functions rotatey3d and rotatex3d affect the cube when it was never used to draw it ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | tell , what techniques of the analysis you used at creation of this algorithm ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | try using the number scrubber to change the values in the function calls . user interaction we can rotate the cube by adding function calls , but it 's a lot more useful ( and satisfying ) if we can enable the viewer to rotate the cube using their mouse . for this we need to create a mousedragged ( ) function . | how do you draw the sides of the cube ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we store sin ( theta ) and cos ( theta ) outside the loop so we only need to calculate them once : var rotatez3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = 0 ; n & lt ; nodes.length ; n++ ) { var node = nodes [ n ] ; var x = node [ 0 ] ; var y = node [ 1 ] ; node ... | why does only rotating the shape only around the y or x axis make it look 3d ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | i 'm trying to use this code : node [ 0 ] = x * costheta - y * sintheta ; node [ 1 ] = y * costheta + x * sintheta ; to rotate my shape around a different origin ( 200,200,200 ) ; how would i do that ? |
rotating things in three dimensions sounds complicated and it can be , but there are some simple rotations . for example , if we imagine rotating our cube around the z-axis ( which points out of the screen ) , we are actually just rotating a square in two dimensions : a reason to learn trigonometry we can simplify thin... | we can take our trigonometry and function from before , and just re-label the axis so that the z-axis becomes the y-axis . in this case , the y-coordinates of the node do not change , only the x and the z : var rotatey3d = function ( theta ) { var sintheta = sin ( theta ) ; var costheta = cos ( theta ) ; for ( var n = ... | why use the trig identities when you could just use the cosine and sine of the sum of the angles ? |
who were the edo firemen ? fires in edo japan ( present-day tokyo ) were a constant danger . buildings were built primarily of wood and paper , and open hearth fires were common . earthquakes often precipitated terrible fires , and this is a continued threat in japan today , as realized in the kobe earthquake of januar... | who were the edo firemen ? fires in edo japan ( present-day tokyo ) were a constant danger . | -- where is the photo ? |
marcia and her three little girls took me dancing at the louvre . i thought i was taking them to see the mona lisa . you ’ ve never seen anything like this . well , the french hadn ’ t either . never mind leonardo da vinci and mona lisa , marcia and her three girls were the show . ( willa marie simone , dancing at the ... | she challenges us to consider expectations of gender and race , as well as traditional expectations and values of what art might be . through image and text , ringgold rewrites history to make a place for women like herself in its historical development . the transformative power of ringgold ’ s message led her to tran... | i would like to ask the reader : why did the artist make these particular choices ? |
marcia and her three little girls took me dancing at the louvre . i thought i was taking them to see the mona lisa . you ’ ve never seen anything like this . well , the french hadn ’ t either . never mind leonardo da vinci and mona lisa , marcia and her three girls were the show . ( willa marie simone , dancing at the ... | never mind leonardo da vinci and mona lisa , marcia and her three girls were the show . ( willa marie simone , dancing at the louvre ) breaking rules faith ringgold ’ s dancing at the louvre is all about breaking the rules , and having lots of fun while doing it . combining representational painting and african-america... | how can justify the success of dancing activity ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | sometimes arrowheads are not drawn and the direction must be indicated in some other way . for historical reasons the convention is to label one region 'north ' and another 'south ' and draw field lines only from these 'poles ' . the field is assumed to follow the lines from north to south . 'n ' and 's ' labels are us... | why is the direction of magnetic field is from north to south why not south to north ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . | do magnets create an magnetic field ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | when no current is flowing in the wire the compass points north as shown due to the earth 's field ( assume the field of the earth is $ 5\cdot 10^ { -5 } ~\mathrm { t } $ ) . exercise 1a : what current ( magnitude and direction ) would be required to cancel out the field of the earth and 'confuse ' the compass ? exerci... | in exercise 1a what would the compass point to when distracted by the magnetic field generated by the current flowing through the wire ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | what is the origin of the magnetic field ? magnetic fields occur whenever charge is in motion . as more charge is put in more motion , the strength of a magnetic field increases . | but my question 1. is the motion of circular path is clockwise or anti clockwise ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | the direction is easy to measure . we can use a magnetic compass which lines up with the field . magnetic compasses have been used for navigation ( using the earth 's magnetic field ) since the 11ᵗʰ century . | is there something like magnetic compass and geographic compass ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | we can use a magnetic compass which lines up with the field . magnetic compasses have been used for navigation ( using the earth 's magnetic field ) since the 11ᵗʰ century . interestingly , measuring the strength is considerably more difficult . | and what 's the difference between earth 's magnetic and geographic poles ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | even a tiny piece of material contains billions of atoms . if they are all randomly orientated the overall field will cancel out , regardless of how many unpaired electrons the material has . the material has to be stable enough at room temperature to allow an overall preferred orientation to be established . | if the electrons are all randomly oriented , how does the overall magnetic field cancel out ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | we can draw as many lines as we want . the field-line description has some useful properties : magnetic field lines never cross . magnetic field lines naturally bunch together in regions where the magnetic field is the strongest . this means that the density of field lines indicates the strength of the field . | do magnetic field lines actually exist in space ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . | when a 2 magnets experience a repulsive or attractive force , but are stuck to the ground , is there a moving magnetic field in between ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that magnets have two poles and that depending on the orientation of two magnets there can be attraction ( opposite poles ) or repulsion ( similar poles ) . we recognize that there is some... | why same poles of magnet repel and opposite attract ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | for simple problems taking place in air you wo n't need to worry about this distinction . what is the origin of the magnetic field ? magnetic fields occur whenever charge is in motion . as more charge is put in more motion , the strength of a magnetic field increases . magnetism and magnetic fields are one aspect of th... | hello , can someone explain pole strength and magnetic moment ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . | hello does `` magnetic induction '' and `` magnetic field '' mean the same ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | $ \mu_0 = 4\pi\cdot 10^ { -7 } ~\mathrm { t\cdot m / a } $ . some materials have the ability to concentrate magnetic fields , this is described by those materials having higher permeability . since the magnetic field is a vector , we also need to know the direction . | some materials have the ability to concentrate magnetic field ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . | what is a scalar magnetic field ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | the direction is easy to measure . we can use a magnetic compass which lines up with the field . magnetic compasses have been used for navigation ( using the earth 's magnetic field ) since the 11ᵗʰ century . | does it use scalar waves aka longitudinal waves somehow ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | we recognize that there is some region extending around a magnet where this happens . the magnetic field describes this region . there are two different ways that a magnetic field is typically illustrated : the magnetic field is described mathematically as a vector field . this vector field can be plotted directly as a... | and , how is it different from a normal magnetic field ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that magnets have two poles and that depending on the orientation of two magnets there can be attraction ( opposite poles ) or repulsion ( similar poles ) . we recognize that there is some... | what would happen to a steel ball kept at the neutral point between two magnets ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | here we dispense with the grid pattern and connect the vectors with smooth lines . we can draw as many lines as we want . the field-line description has some useful properties : magnetic field lines never cross . magnetic field lines naturally bunch together in regions where the magnetic field is the strongest . this m... | magnetic fields and vector have their own direction lines.. q-could these field lines and vectors be turned or deflected ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | this is commonly done with iron filings dropped on a surface near something magnetic . each filing behaves like a tiny magnet with a north and south pole . the filings naturally separate from each other because similar poles repel each other . | so , earth 's geographic north pole is the south pole ( that 's why north pole of the compass is attracted ) and earth 's geographic south pole is the north pole , right ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | when no current is flowing in the wire the compass points north as shown due to the earth 's field ( assume the field of the earth is $ 5\cdot 10^ { -5 } ~\mathrm { t } $ ) . exercise 1a : what current ( magnitude and direction ) would be required to cancel out the field of the earth and 'confuse ' the compass ? exerci... | can someone explain more clearly how the answer was arrived for 2nd part of qstn 1a ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . | why is magnetic field so important ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | when no current is flowing in the wire the compass points north as shown due to the earth 's field ( assume the field of the earth is $ 5\cdot 10^ { -5 } ~\mathrm { t } $ ) . exercise 1a : what current ( magnitude and direction ) would be required to cancel out the field of the earth and 'confuse ' the compass ? exerci... | what would happen to the compass in the last exercise after the field of earth is cancelled ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | we understand that magnets have two poles and that depending on the orientation of two magnets there can be attraction ( opposite poles ) or repulsion ( similar poles ) . we recognize that there is some region extending around a magnet where this happens . the magnetic field describes this region . | what happens if we cut a magnet from the center ? |
what is a magnetic field ? a magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic . most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them . we understand that ma... | $ \mu_0 = 4\pi\cdot 10^ { -7 } ~\mathrm { t\cdot m / a } $ . some materials have the ability to concentrate magnetic fields , this is described by those materials having higher permeability . since the magnetic field is a vector , we also need to know the direction . | what makes diamagnetic materials special ? |
out shopping like many northern renaissance paintings , petrus christus ’ goldsmith in his shop reveals its complexities to the viewer over time . at first , one sees a group of three people inside a room filled with trinkets . the two standing figures—a male and a female in dressed in rich , expensive-looking clothing... | indeed , northern paintings from this period ( by petrus christus himself , along with his contemporaries jan van eyck and hans memling ) were often bought by italians and made their way into italy and helped shape the style of the italian high renaissance , as well as the mannerist period that followed . still , these... | when do historians agree that the age of the `` modern world '' began ? |
out shopping like many northern renaissance paintings , petrus christus ’ goldsmith in his shop reveals its complexities to the viewer over time . at first , one sees a group of three people inside a room filled with trinkets . the two standing figures—a male and a female in dressed in rich , expensive-looking clothing... | since the scale in the hand of the goldsmith , along with the illusions to marriage and purity , represent perfection and balance , the presence of the two figures with their ill-associated bird creates a contrast between the perfect world of the royals and the imperfect world of the viewer . the royal couple is morall... | in the fourth paragraph , is n't the phrase `` the royal couple is morally superior to the common man '' a tenuous interpretation ? |
out shopping like many northern renaissance paintings , petrus christus ’ goldsmith in his shop reveals its complexities to the viewer over time . at first , one sees a group of three people inside a room filled with trinkets . the two standing figures—a male and a female in dressed in rich , expensive-looking clothing... | since the painting is signed and dated by the artist in white paint in the center foreground , it can firmly be placed in the year 1449 . this is the year that king james ii of scotland married mary of guelders . the duke of burgundy , phillip the good , who was also a renowned patron of the arts in bruges , commission... | on the contrary , i would think that royals and noblemen would be the more likely to have and use falcons for hunting , and the portrayed couple are supposed to be or to represent james ii and mary ? |
out shopping like many northern renaissance paintings , petrus christus ’ goldsmith in his shop reveals its complexities to the viewer over time . at first , one sees a group of three people inside a room filled with trinkets . the two standing figures—a male and a female in dressed in rich , expensive-looking clothing... | although northern art of this period is often compared to italian art ( and often unfavorably at that ) , paintings such as petrus christus ’ goldsmith in his shop demonstrate that , although the concerns of the northern artist were different , they were no less talented , their paintings no less beautiful and complex ... | how does the style differ from similar artwork made before or after it ? |
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