id stringlengths 5 6 | input stringlengths 3 301 | output list | meta null |
|---|---|---|---|
n9adt | Is there enough food for everyone in the world? | [
{
"answer": "There's more to this complex topic than politics. There's also transportation issues, more people in the world having access to meat which is less efficient for feeding people, people honestly not caring and the like. Hunger does kill roughly [17,000 children](_URL_2_) around the world per day.\n\n... | null |
2ajgtu | What is the maximum frame rate and resolution on a computer monitor or TV before it makes no difference to the human eye? | [
{
"answer": " > Does it even make sense for an 8k camera to exist?\n\nEven if the resolution of an image is indiscernable at lifesize, that doesn't mean higher resolutions are useless. To take a simple example, imagine you make a very large print of a picture you have taken. Then fine details that would be blu... | null |
2bf9wv | What are some good resources for translating Mesopotamian cuneiform into English? (xpost r/cuneiform) | [
{
"answer": "First, you should probably get a good grammar and dictionary of the underlying languages so you don't produce unintelligible nonsense or at least make the english _vorlage_ marginally less visible. The standard grammar for Akkadian is Huhenergard's _A Grammar of Akkadian_ and of Hittite is Van Den ... | null |
30xc0l | if i play sports that are challenging for my joints, will they get stronger from the work out, or will they get bad (especially if pain shows up when i get older)? | [
{
"answer": "I don't know of an overall answer, or if it's different for different sports, but my wife rowed crew in college, and the first day the coach told everyone, \"This sport is going to ruin your knees.\"",
"provenance": null
},
{
"answer": "Permanent damage is permanent. \n\nOn the other ha... | null |
5t276f | how do the autonomous regions of spain work in relation to the national government? | [
{
"answer": "It is similar to states, in that autonomous regions can enact their own laws if those laws mesh with national laws.\n\nSpain's monarchy doesnt matter much, as it is primarily lead by a Prime Minister (not the King).\n\nAll autonomous communities have a parliament (Legislative Assembly, Council of G... | null |
dc78n7 | "eli5" how is the flame shaped behind a rocket. | [
{
"answer": "These cones are commonly called shock diamonds and is present in all jet engines not only rocket engines. A jet engines nozzle is designed to output an exhaust at a specific velocity and pressure. Ideally the pressure would be the same as ambient pressure. However, especially for rocket engines tha... | null |
bbkmkh | why would a beverage have both sucrose and sucralose in it? | [
{
"answer": "It's likely related to the well-known \"sugar tax\" being levied by various governments, US included. Drinks with sugar levels above a certain limit are subject to additional taxation.\n\nRemoval of X% sugar, and replacement with sucralose, will take it below that level.",
"provenance": null
... | null |
2fzzws | Did the Vikings really perform the "Blood Eagle" on christians, or is it just a myth? | [
{
"answer": "[Here is a previous thread](_URL_0_) that answers this question. The answer is probably not.",
"provenance": null
},
{
"answer": "Not what you are asking, but at the end of 15th century Joan de Canyamars, a peasant, a squatter, tried to kill the Catalan King Ferdinand, in Barcelona.\n\n... | null |
281qxt | does marijuana have side-effects/withdrawal symptoms like controlled-substance medications such as xanax? if not, why is the latter available legally in every state (with prescription)? | [
{
"answer": " > Yes, marijuana has side-effects and withdrawal symptoms.\n\n---\n\n > Additionally, weed has no addictive properties or withdrawal affects.\n\n:-/",
"provenance": null
},
{
"answer": "I anticipate anyone who points out negative things about weed will be heavily down voted.",
"p... | null |
gjpsg | A question or two on Jellyfish | [
{
"answer": "Hmmm I wish someone answered these questions. They seem quite interesting! ",
"provenance": null
},
{
"answer": "wow, lots of questions, I'll do my best.\n\nJellyfish are some of the most basic animals but not life forms. They have two cell layers unlike most animals which have three. T... | null |
4krbt1 | In High School I was taught WW2 began because of the Treaty of Versailles. However on /r/warcollege and /r/shitwehraboossay the users often point out the Germans not only came out of WW1 economicly strong but that the Germans sabatoged their economy. Can someone expand? | [
{
"answer": "I must refer you to this post by /u/EvanHarper\nwhich should explain your questions. - > \n_URL_0_\nThe only thing i wish to add is to keep germany's ww1 money creation (the war had inflationary tendencies because consumer spending couldn't keep up with consumer income ) and public debt in mind wh... | null |
5clnxo | why are pesticides meant to kill insects and rodents also poisonous to humans? | [
{
"answer": "Because we are very close relatively speaking in terms of evolution. We are, in a broad sense, not \"very\" different to each other. That's why it's hard. For example, Nicotine (and caffeine) were created by plants to attack insect \"brains\" and those molecules also bind to humans brains. But it c... | null |
42guu9 | suppose you live in Italy in 90 BCE. would you (likely) think of yourself as entirely Roman, or would you still identify as whatever culture (etruscan, latin, ect) your ancestors had belonged to before the romans conquered them? | [
{
"answer": "In 90 BCE most likely (it is a current debate among historians what actually was going on, and when I finish my dissertation I'll tell you what actually was going on) didn't consider themselves Roman citizens - certainly not in a legal sense, and possibly not in an ethnic sense. The coins of the r... | null |
8xlh6y | Post Roman Britain ruins | [
{
"answer": "Hi there. /u/itsallfolklore and I discussed what is essentially your question [here](_URL_0_). \n\nThe TL/DR of that is that the Anglo-Saxons were extremely aware of *who* built the Roman sites around England, and often *how*, and lamented the fact that they were often unable to replicate them. The... | null |
4nvli6 | why is the 5-pointed star so prevalant on flags & in militaries | [
{
"answer": "The pentagram has been a popular symbol since ancient times. There are a few theories about why this might have happened:\n\n* It is possible to draw a pentagram in one go. It might have been a symbol of continuity or endlessness, much like a circle, just more fancy looking. This might also explain... | null |
2wtm3e | Why did the Germanic word France replace the Latin name Gaul, but the Latin name Germany survive against the German name Deutschland? | [
{
"answer": "As you seem to be aware, you are asking several different questions here, some of which are hard to answer. It is not unusual to have a country go by different names in different languages, but why that may be the case can be difficult to ascertain. I will just try to answer the question of when th... | null |
1dsc9j | Why has the Colombian armed conflict lasted so long? | [
{
"answer": "Because is has ceased to be a political conflict and is about power and destabilization to protect drug interests. [This article](_URL_0_) discusses the FARC involvement in the trade from 13 years ago. It is now a financial life line for FARC. Most of their charismatic leaders are dead. Their p... | null |
66rhc1 | Eli5 has asked where the term "Russian Roulette" comes from, but the answers are a mess. Historians, is there any historical explanation for the term? | [
{
"answer": "Hi, more discussion is welcome here, but do check out this earlier thread \n\n* [Russian roulette - what is the origin? Has it actually been played? Are there testimonials from survivors?](_URL_0_) ",
"provenance": null
},
{
"answer": "Sources conflict:\n\n- *[Brewer's Dictionary of ... | null |
n9dwc | If I had an electric chain saw, and then accidentally sawed the electric cord, would I get shocked? | [
{
"answer": "The short answer is yes, it is possible. In order to disable the chainsaw, you have to cut through either the live or neutral line. So there may be a brief or sustained period where the chainsaw housing becomes live.\n\nHowever, there are simply too many variables to be able to say whether you woul... | null |
7lzvm1 | How did Scandinavians shift from being plundering Vikings to the seemingly sensible folk they are perceived as today? | [
{
"answer": "First, it is important to note that all Scandinavians was not plundering Vikings, most of them was in fact farmers, fishers and hunters. Furthermore, those that actually travelled was not only raiders, they were traders, explorers, colonizers and even mercenaries too. It is also important to know t... | null |
6uyhxy | Is there any cost increase for ISP's in increasing download speeds ? | [
{
"answer": "That's entirely based on whether they have to invest in infrastructure ( routers, switches, cabling, etc ) or if the structure is already there. \n\nExample. I worked for Comcast in 2007. Their entire network up until the last mile before your home is fiber optic. They could quite literally flip a... | null |
3yd784 | trading 'futures' in the stock market | [
{
"answer": "\"Futures\" are contracts for the future delivery of an item. Instead of buying a farmer's onions that he just harvested, I invest in the onions that he has yet to grow. The farmer can use the investment on his farm right away, which might help the harvest, and it tends to stabilize the price.",
... | null |
sl29o | If I have two insulated bottles one contains water that is 10 degrees c lower than room temp. The other 10 degrees warmer. Which will become room temp faster / slower. | [
{
"answer": "Practically, both will reach room temperature at the same time.\n\nTheoretically, the warmer one might reach it slightly faster because it starts out less dense, and therefore starts with less mass, but the difference is likely negligible.",
"provenance": null
},
{
"answer": "A minor ef... | null |
3ukt4z | Historians, how do you deal with sad moments of History? (written records, images, films, etc) | [
{
"answer": "I often end up crying during my research. Due to the area I study I focus specifically on the 'lighter' topics within it, and even those can be very distressing. However, I think I'd be extremely worried if it didn't phase me. When you're seeing the personal experience of someone who you have a 'co... | null |
92t2ld | will my teeth move after braces are removed? | [
{
"answer": "Nah, at least not significantly in 10 days. Putting the retainer on the first time might be uncomfortable because of the minute movement, but if you wear it properly afterwards it will keep it in place.\n\nIt is important you're not lazy with your retainer though. Many people have to get braces for... | null |
ugtjb | Is the production of bio-fuels viable? | [
{
"answer": "Some biofuels use [waste vegetable oil](_URL_1_) from restaurants although this is a smaller niche market.\n\nI've seen [these people](_URL_0_) at fast food restaurants.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "2564540",
"tit... | null |
5l3unr | how do they determine what age group of kids is safe for a specific toy? does the administration just say what they think is right or is there actually a scientific way to determine this? | [
{
"answer": "In the United States there are regulations that spell out how toys for children need to be tested and how the safe age range should be determined. Most toy manufacturers have to submit toys for third party testing and then certify the results in a Children's Product Certificate. The United States C... | null |
57dyyx | How much ammo did the typical Napoleonic era musket man have? | [
{
"answer": "Amendment: My original calculations on rate of fire were based on a company and then incorrectly widened to a battalion. A company fires 108 shots a minute on average, with a battalion firing 648. \n\nHello There, \n\nI am going to use my knowledge of the Habsburg military during the war of 1809 a... | null |
48jltd | Can DNA be made using L-sugars? | [
{
"answer": "Yes you can! It is called L-DNA, as opposed to naturally occurring D-DNA. You can even [buy it](_URL_1_). It retains all of the base pairing rules, but the helix chirality is reversed. As a result, L-DNA will not hybridize with a complementary strand of D-DNA. \nIt has potential uses in biological... | null |
3i4svt | How did medieval Islamic historians write about/conceptualise the history of their religion? Please also tell me about who wrote history in the medieval Islamic world, why, and what written history was used for in medieval Islamic society. | [
{
"answer": "How does askhistorians feel about doing peoples assignments for them?",
"provenance": null
},
{
"answer": "Islamic history was, like Jewish and Christian history, originally preserved orally. As these oral histories were passed on, early Muslims attached special importance to whom they ... | null |
zpvf1 | What is the white thread-like substance found under a scab? | [
{
"answer": "[Fibrin](_URL_0_).\n\nIt's a fibrous matrix protein that polymerizes to cover open wounds as part of the clotting response.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "30973411",
"title": "Dark stain",
"section": "Sectio... | null |
48g7tw | why do humans find it necessary to try and control how others live their lives even when it doesn't affect them personally? | [
{
"answer": "We are a social species that evolved to live in villages of under 300 people. So we have evolved instincts designed to ensure our place in the hierarchy, and to regulate and stabilize the group. When you live in a small village, *everyone's* behavior affects you personally.\n",
"provenance": nu... | null |
3eq9zm | why when you look sideways at a moniter it looks like a picture negative? | [
{
"answer": "Nope, it's just LCD monitors. LCD stands for \"liquid crystal display\", because there is a layer of an electrically reactive liquid, enclosed in tiny little cells, over the top of the screen. When the liquid is activated, it turns dark, blocking out a pixel of color. As you move to the side, in... | null |
5onwec | why won't companies like valve make games such as half life 3 which would pretty much guarantee them unimaginable profits? is there another reason for not doing it apart from the risk of it not being that good? | [
{
"answer": "Valve is making money hand over fist with Steam. Half Life 3 has impossible expectations to live up to so I'm sure they'll wait until the risk doesn't outweigh the reward. Why risk messing things up right now when they're doing really well?\n\nSquare long ago said they would never remake FF7. Th... | null |
6qsakb | Why is the American West of the 1800s portrayed as a desert? | [
{
"answer": "The vast majority of the American West cannot support agriculture without irrigation - often involving water from wells. It is a dry place, and this reality sets it apart from the other North American regions. It is depicted as a dry place because that is what it is. There are obvious exceptions to... | null |
626noz | why do you always need a resistance in front of a led even if the voltage is lower than the max the led can handle? | [
{
"answer": "The issue is that for an LED a small change in voltage can mean a very large change in current. For the resistor a change in voltage produces an equivalent change in current, different from an LED. You can't really know how much current is going through an LED at a given voltage except by testing, ... | null |
22yynr | What is the particle physics behind the triple point of a substance? | [
{
"answer": "From the point of view of thermodynamics (basically, looking at the system as a whole) the triple point is the point at which 3 phases of matter all have the same energy so matter can freely change between the 3 states.\n\nOn the scale of a single molecule, thermodynamic properties (such as the pha... | null |
8bzkzw | Is heterochromia the result of transposoable elements? | [
{
"answer": "I wouldn't apply that concept to humans right away. We are much more complex than corn and have mechanisms in place in our DNA to combat things like this since this could be death to us if we had random genes jumping around willy nilly in us. Heterochromia can be the result of many causations like ... | null |
rrru9 | Is there any scientific basis for the claims of "r/nofap" on their FAQ page? | [
{
"answer": "There is such thing as numbed pleasure response, it occurs when dopamine releasing behaviour happens, it usually only occurs after an excess.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "46775885",
"title": "NoFap",
"sect... | null |
39li8r | why doesn't gravity have an opposite, like the other fundamental forces? | [
{
"answer": "Because we have never found a particle with a negative gravitational mass.\n\nCould there be an entire galaxy of negatively charged gravitationally charged particles that repel our matter. Conceivably, but there are a few things that would make this different.\n\nIn E & M like repels like. With gra... | null |
i3k96 | Can animals become friends? | [
{
"answer": "I take it you're referring to animals *of different species* becoming friends/companions/packs. Most dogs will naturally associate with other dogs. As merely an anecdotal example: growing up I had two dogs, one of which was much older than the other, blind and deaf, and like the text in your photo ... | null |
2p1s7v | why do videos playback/appear smoother on my phone when the brightness is all the way down and the lights are off? | [
{
"answer": "It has more to do with how your brain interprets visual data. The low brightness makes it harder to notice small little hiccups in playback, so you have an easier time perceiving it as smooth motion.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedi... | null |
3o9ic3 | what's wrong with developing downtowns? | [
{
"answer": "You'll have to give more details.\n\nWho is saying there is a problem developing downtowns? What are their arguments?\n\nMost people involved in urban design and development would argue that developing downtowns is the best thing that a city or region can do to improve its finances, reduce car c... | null |
1q636n | why military forces use standard-capacity magazines for their rifles if there are magazines with much higher capacity? | [
{
"answer": "Simplicity, low cost and, often overlooked, the means to carry, exchange and manage magazines in the heat of battle would be my guesses. \nVery large capacity mags tend to be bulky and heavy.",
"provenance": null
},
{
"answer": "Standard operating procedure isn't to go full auto on ever... | null |
23nlxg | Are sociopaths born that way, or "formed" through dramatic childhoods/experiences? | [
{
"answer": "Both. There is a genetic predilection towards whether someone is a sociopath but the genes responsible (those we suspect based on genome wide association studies) are neither perfectly predictive nor required. That unpredictability implies conditioning is also important in the development of soci... | null |
4a5u91 | [Math][Physics]How can the Many-World Interpretation make meaningful statements about probability when infinity is involved? | [
{
"answer": "Your main question is really a math one: if we have an uncountably infinite number of possible outcomes x, how do we define probabilities? This is done using a [probability density function](_URL_0_) p(x). Then the probability that x will be between the values a and b will be given by\n\nP(a < x < ... | null |
3godyn | why is artificial light used to grow plants on iss instead of the sun? | [
{
"answer": "If you leave the window shades up all the time, you will heat the inside of the ship up a lot. Additionally, you'd only get light on the plants half the time since you're going around the earth every 90 minutes. Finally, with LEDs you can control the wavelength and intensity of light to optimize gr... | null |
bz4jtf | how do movies go from the raw footage (film or digital) to 4k? | [
{
"answer": "With digital recordings, the raw footage is usually higher quality than 4K (IIRC, 8K is fairly common). For final release, you just render the video in the release quality and write it to the DVD or blu-ray (or digital download/streaming service).\n\nWith film, we're lucky because film is actually ... | null |
58txje | if fish are cold blooded, how do some species function at depths of over 900 meters where the temperatures are 0-3 degrees celsius? | [
{
"answer": "Fish have a unique chemistry. It has been determined that often their blood is similar to antifreeze. This makes them able to function at colder temperatures than a lake trout or some similar surface water species.",
"provenance": null
},
{
"answer": "_URL_0_\n\nThis does a pretty good ... | null |
21thry | how did the pdf format become so popular? | [
{
"answer": "First, there was a need for a way to represent paper online. A PDF is a decent approximation of a paper document as it will print to actual paper without any issues. The PDF is an early example of \"What You See Is What You Get\", or WYSIWYG. This became handy when people would need to send print d... | null |
2odx7r | What was the Russian reaction to the finding of gold in Alaska? | [
{
"answer": "Hey there, /u/usaf2222. There wasn't any \"oh, damn\" moment, if that's what you're asking. From the perspective of the Russian-American Company, gold was actually a headache.\n\nRussian officials were aware of traces of gold on the Kenai Peninsula as early as the 1840s, when engineer and [geologis... | null |
rvebu | explain to me how stocks work, what makes the price go up/down? | [
{
"answer": "Also, you can think about companies like cows, and buying stock like buying part of a cow (and buying part not in the sense of the tail of the hooves, but owning a certain portion of the money the cow generates). The cow can make you money in two ways:\n\n1) Whenever the cow is milked the owners of... | null |
3dhhc2 | Were there any signs of the native American tribes moving towards unification before the arrival of Europeans? | [
{
"answer": "Well, first you'll want to consider that the indigenous people of the Americas are nowhere near a homogenous unit. The differences in culture, language and societal structure between a Pequot village in Connecticut and a Blackfoot band in Montana are (speaking unscientifically) as great as any betw... | null |
163c6d | Will a mixture of two different liquids, distributed into two beakers in a closed system, eventually separate into pure liquids in each beaker via vapour? | [
{
"answer": "A fully separated mixture is a very low entropy state. If the system is being driven by thermal fluctuations, it is very unlikely that it will evolve to such a state. For that to occur, there has to be an internal energy benefit to separation (such as buoyancy in a centrifuge).",
"provenance": ... | null |
ctnk0j | Ok so this might be a dumb question but in WW1 why didnt the americans use Winchester lever actions instead of the bolt actions they used? | [
{
"answer": "The lack of lever actions in frontline service prior to WW1 by most Great Powers is due to a variety of factors largely relating to doctrine. The US in particular had a lot of driving reasons that paralleled concerns of most other powers, but exacerbated by the country's unique circumstances betwee... | null |
3w8nq0 | why do all big music artist's youtube channel's names end with vevo? | [
{
"answer": "\"Youtube/Google was in danger of being sued by Sony Music/UMG music. To prevent a potentially devastating lawsuit, Google's CEO (at the time) Eric Schmidt made a deal with Doug Morris, CEO of Sony Music, to build a parallel video platform based on YouTube tech where Sony could control the monetiza... | null |
tnju9 | ] what is the volcker rule, and how does it operate? | [
{
"answer": "So, it's actually really simple but the formal legislation is so complicated because of politicians.\n\nIt means that banks that take deposits (Like JPMorganChase) cant participate in proprietary trading. What is prop trading? It's basically trades that are purely for JPMorgans books/profits (basic... | null |
75zegh | Does There Exist A Series Smaller than the Harmonic Series that STILL Diverges? | [
{
"answer": "The Nth term in the Harmonic Series is approximately equal to log(N) (where this is the natural log). In fact, the difference between 1+1/2+1/3+...+1/N and log(N) is pretty small and measured by the [Euler-Mascheroni Constant](_URL_0_).\n\nBut there are definitely series that diverge slower than th... | null |
6oe8lg | How were Roman provincial governments setup? | [
{
"answer": "I'm a little confused by what you mean here. What are military provinces exactly? There's no such class of provinces in Roman law. Do you mean the Imperial Provinces of the Principate, which housed legions and whose administrators were directly appointed by the emperors, as opposed to the Senatoria... | null |
3dscsf | do planets get smaller with time? | [
{
"answer": "Just the opposite, actually. Continuous meteor impacts make planets gain mass over time. Eventually though all suns explode, and the planets around them scatter to dust.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "265006",
"titl... | null |
2y8a7r | why are spell checkers still not aware of grammatical issues? | [
{
"answer": "Complexity.\n\nHere's a computer's spell checking algorithm.\n\n For each word in document\n If word does not appear in dictionary\n highlight it\n compare closest word matches based on percentage and position of letters\n include mouseover window or other... | null |
3jvf5d | why is addition so much easier to do than subtraction in your head? | [
{
"answer": "Practice. I noticed this when I was a kid, too. And noticed teachers always gave more add/multiply homework than subtract/divide, which seemed (still does) backwards to me.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "2780664",
"... | null |
23ujqx | as a british person who has never used or had dealings with comcast, what is so bad about them? | [
{
"answer": "poor customer service, along with abysmal Internet performance during peak hours. and now you can't choose anything else because Comcast is exclusive to your area. I'm sure other people will have more elaborate stories, however I'm fresh out currently ",
"provenance": null
},
{
"answer... | null |
5ptdmg | what is the purpose of the turnable dial around the face of a watch? | [
{
"answer": "The ring as we know it today on some watches, also called rotating bezel, actually dates to the first diving watches of the 1950's. At the time, using a stopwatch was impossible, because every additional pusher could further compromise water-resistance, so instead they relied upon the bezel as a ba... | null |
34gdlx | why can't software companies make an update/download/install status bar that moves evenly and accurately reflects the percentage of the task that is actually complete? | [
{
"answer": "Let's forget about the computers for a moment.\n\nYou're driving down an unfamiliar road with nothing but a map and a bunch of boxes you need to deliver to various houses. How do you estimate how long this will take you?\n\nThe short answer is that you can't definitively say how long it will take, ... | null |
6n8ezt | why is a photocopying machine so huge compared to a normal colour printer? | [
{
"answer": "There are very small photocopiers too.\n\nOn the large ones, most of the extra size is for complex paper handling: several large supplies of different sizes of paper; a collator that can make 10-20 separate copies of a whole document; sometimes an auto-stapler; a high-speed jam-resistant paper feed... | null |
r4f93 | What evolutionary advantage do bacteria gain by producing highly lethal toxins? | [
{
"answer": "In some cases, poisons cause the host to excrete bacteria everywhere, getting it in the water supply and infecting others. Lots of diaharreal diseases work this way. Sure, the host may be killed but many more may be infected. On the other hand, many non-parasitic bacteria produce toxins. These ... | null |
27tq62 | where do our sweat glands pull water from when we sweat? | [
{
"answer": "Yes, it mostly comes from blood (and tissue fluid, which is blood without the cells that takes nutrients all the way to your cells). The sweat glands actively pump out salts into your pore and water follows by osmosis. ",
"provenance": null
},
{
"answer": null,
"provenance": [
... | null |
5c23b9 | does frequency of life change during refraction? | [
{
"answer": " > So how can the frequency of the light beam change to different frequencies?\n\nIt doesn't. The \"white\" light beam was actually made up of many different frequencies all going along together. A prism is dividing up already separate things like you would sort a bag of M & Ms, not splitting some... | null |
3hqea0 | Is it true that all elements/chemicals/things metallize at high pressures? | [
{
"answer": "I believe so. Things become metals because the valence band of electrons overlaps the conduction band. This happens when you squeeze things.\n\nHere are a few examples\n\n[Water](_URL_0_)\n\n[Nitrogen](_URL_1_)\n\n[Oxygen](_URL_3_)\n\n[Helium](_URL_2_)\n\n[Hydrogen](_URL_4_)\n\n[Sulfur](_URL_5_)"... | null |
1f6qra | When a man urinates from a standing position into a toilet, will less splash back be generated if he aims for the water or the dry porcelain? | [
{
"answer": "If you kind of hit the side of the bowl at an angle there is little splash.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "239932",
"title": "Flush toilet",
"section": "Section::::Operation.:Mechanical flush from a high pre... | null |
efl83o | why is it when you’re sick and can’t keep water down that something like sprite or ginger ale will stay down? | [
{
"answer": "Answer: ginger has some medicinal properties that help deal with nausea or indigestion. Pop drinks also have a lot of sugar in them, which is a quick source of energy when you're sick and unable to keep food down. So a flat ginger ale gives you the benefit of soothing your stomach a bit and giving ... | null |
39c6ew | why do military ship names begin with uss, hms, etc.? | [
{
"answer": "USS = United States Ship\n\nHMS = Her Majesty's Ship\n\nThese prefixes are part of naval tradition and vary from navy to navy. ",
"provenance": null
},
{
"answer": "They signify what country's military they represent. \n\nUSS = United States Ship\n\nHMS = Her/His Magesty's Ship, meaning... | null |
1zo1cp | why do networks like abc,nbc,etc "partner" with comcast or other providers to view shows online. | [
{
"answer": "Broadcast networks make lots of money selling carriage licenses to cable companies which allow those companies to include the channels in their lineups.\n\nBy limiting the audience of free in-season streaming video, broadcast networks are keeping their partners happy. When video is completely free... | null |
4zvqmr | How can non-locality avoid violating causality? | [
{
"answer": "The trick is information is never actually transmitted via entanglement. Thus, causality is never broken since you can't actually influence anyone outside your lightcone. In other words, entanglement can only ever produce correlated results, but each result is truly independent and random and you'd... | null |
6d5b1f | How do we know that entangled particles don't have predetermined spins from the very start? | [
{
"answer": "This is known as the \"hidden variable\" hypothesis. In fact, there's ways to test this, designed by John Bell in the 20th century. If your suggestion is true, then if we run a very carefully designed kind of spin-measuring experiment many times, we would find a different proportion of outcomes tha... | null |
1mj6gz | When you look up at the night sky at you see a single star, how many photons are entering your eye so that you can see that one star? | [
{
"answer": "The Sun has [apparent magnitude](_URL_2_) -26.74, and the dimmest star we can see with the naked eye is magnitude +6. That's a magnitude difference of 32.74, meaning the Sun is about 12 trillion times brighter (as viewed from Earth). Since the Sun is radiating [1361 Watts per square meter](_URL_0_)... | null |
43ea5e | why do high scoring posts (top all time) get archived so you can't vote on them? | [
{
"answer": "all reddit posts are archived after 6 months\n\ntheres not difference between a high scoring post and a low scoring one",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "43611341",
"title": "Yik Yak",
"section": "Section::::Fe... | null |
1vdai6 | is there a specific reason clocks go clockwise? | [
{
"answer": "Probably because they were modeled after sundials.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "26569682",
"title": "Clockwise",
"section": "Section::::Terminology.\n",
"start_paragraph_id": 5,
"start_char... | null |
1lzdy7 | saturn's 'storm' | [
{
"answer": " > Monster storms rip across the northern hemisphere of Saturn once every 30 years or so, or roughly once per Saturn year.\n\n > \"We think this huge thunderstorm is driving these cloud particles upward, sort of like a volcano bringing up material from the depths and making it visible from outside ... | null |
2zn0d3 | why don't musicians and performers yawn or hiccup on stage ever? | [
{
"answer": "Classical music performer for 8 years here:\n\nIt happens more than you think. I've seen people take small naps on stage, vomit, pass out, etc. The reason it doesn't happen more though is probably because when performers are on stage, their brain focuses on the performance itself and anything els... | null |
1s4r8x | Where did the KKK get its bizarre titles for its hierarchy, such as "Imperial Wizard," "Grand Goblin," "King Kleagle," and "Cyclops"? | [
{
"answer": "Typed wizard into the search bar, second result:\n\n_URL_0_\n\nTyped KKK into the search bar, first result:\n\n_URL_1_",
"provenance": null
},
{
"answer": "If you post joke answers and pointless comments in this thread, your comment will be nuked and you'll earn yourself an official war... | null |
gkgq5 | With all of the testing done on mice, roughly how long do you think we could keep one alive in captivity? Assume cost is no issue. | [
{
"answer": "_URL_0_\n\nThis is a challenge to figure out exactly that.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "1840294",
"title": "Nude mouse",
"section": "Section::::Life span.\n",
"start_paragraph_id": 17,
"sta... | null |
ccd5ow | what function do insects like ticks serve in nature? | [
{
"answer": "Evolution does not require a \"function\" in order to justify an animal existing in a niche, it's not all part of some unseen designer's \"plan\".\n\nTicks have a niche because there are things for them to eat. Perhaps one could argue that this keeps \"something worse\" from filling the niche, but... | null |
bu7j1j | Are there more protons, neutrons, or electrons in the universe? How do the three rank by abundance? | [
{
"answer": "I think [this thread](_URL_0_) may be of interest to you! u/fishify says that there are about 7 times as many protons as neutrons in the universe. If we assume that most protons are in atoms and not ions, then it would make sense that there is about one electron for every proton.\n\nThis agrees wit... | null |
c6c914 | why do you have to refrigerate eggs from the grocery store but you don't have to if you get them fresh from a farm? | [
{
"answer": "There is a membrane that comes out of the chickens that cover the egg. In the US, its standard to have the manufacture plant wash and sanitize them, but in places like the UK, they don’t so they can leave their eggs on the counter or shelf for a while.",
"provenance": null
},
{
"answer"... | null |
4yesqn | Why did human life originate in Africa instead of elsewhere? | [
{
"answer": "You may consider posting this question in r/askscience instead, as historians (mostly) work with written evidence.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "968521",
"title": "Max Planck Institute for Evolutionary Anthropology... | null |
1az4dy | Why was Octavian chosen as Caesar's heir? Why wasn't his son chosen? Of course, Agustus had him killed later on, so I'm curious as to why a protector ship wasn't set up instead. | [
{
"answer": "It has to do with the fact that Octavian was purely roman noble blood and ceasarean was half Egyptian. There was also the fear that Caesarian wasn't actually ceaser's son.",
"provenance": null
},
{
"answer": "A lot of it has to do with octavian's spin against cleopatra. There are theori... | null |
539cgu | why coffee is not considered as a drug even though it's one of the ten most addictive substances in the world? | [
{
"answer": "Caffeine is a drug.\n\nThese are the first lines of its wikipedia page:\n\n > Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class. It is the world's most widely consumed psychoactive drug. Unlike many other psychoactive substances, it is legal and unregulated in nearly ... | null |
6p664o | Were any people of colour present during the evacuation of Dunkirk? If so, how many? | [
{
"answer": "This question has been asked a lot recently. I discussed it [here](_URL_0_), but there's always more to be said.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "2952210",
"title": "Isle of Man Steam Packet Company",
"section... | null |
2n2unr | why should we care about the depreciation of a new car? | [
{
"answer": "A car is not an investment. You are always going to lose money on it. But you may chose to lose more or less money.",
"provenance": null
},
{
"answer": "It only matters if you're going to sell the car. If you're me, buy new, enjoy the warranty service, and keep the car 12-15 years, depr... | null |
3nkcgq | why is apple flavoured candy always green when red apples are far more prevalent? | [
{
"answer": "Firstly, depends on where you live, red maybe more prevalent to you. Red is used for strawberry and cherry as they don't have alternates, leaving green as a good option for apples.\n",
"provenance": null
},
{
"answer": "Green apples (called \"Granny Smith's\") are pretty common througho... | null |
2f4y2r | Do paper airplanes "fly" using the same principles as actual airplanes? | [
{
"answer": "Pretty much anything can produce lift depending on its angle of attack, the profile mainly affects how efficiently it will produce that lift.\n\nA sheet of plywood for example can produce a decent amount of lift depending on the angle, its just that its going to produce a lot of drag at the same ti... | null |
4yi8bl | why do some online stores have different regions? | [
{
"answer": "It's due to copyright related issues, one different companies can hold the rights to the same book in different regions, for example that upcoming Star Trek series was licensed to Netflix in every other country than the United States.\n\nSometimes it is also due to legal issues, e.g. games with Naz... | null |
44h0la | why does it take amazon several days to "prepare" items for shipment? | [
{
"answer": "It doesn't take days for Prime members, or people who pay for faster shipping.\n\nIf you take the cheap/free shipping, you're standing in line behind all the people who paid to get it quicker.",
"provenance": null
},
{
"answer": "Okay, you know how a mailman comes to your house every da... | null |
12t935 | why do i hear no music when i push an earbud deeper into my ear? | [
{
"answer": "Earbuds make sound by making waves in the air between the speaker and your eardrum. \n\nIf you seal the ear canal tight and compress the air even tighter, the speaker needs to work harder to make waves. Cheap earbuds under low voltage can't move the air.",
"provenance": null
},
{
"ans... | null |
felech | why do you have to dunk what you're frying first in flour then egg then bread crumbs and sometimes back to egg and a second round of bread crumbs? | [
{
"answer": "The flour and egg make things like breadcrumbs stick to whatever you’re frying. A second round of that process will double up on the breading/crunchiness of it.",
"provenance": null
},
{
"answer": "“Dry sticks to wet” is as simple as I can explain it.\n\nFlour sticks to wet surface of, ... | null |
1qmsn0 | What role do harmonics hold in Acoustic Levitation? | [
{
"answer": "Depending on what you mean by harmonics the answer could either be \"none\" or \"location.\"\n\nThe acoustic levitation I'm most familiar with uses a standing wave to levitate an object at the pressure nodes. If your question is how multiples of the input frequency make a difference for acoustic le... | null |
34uegc | why are there so many immigrants coming across the mediterranean sea? | [
{
"answer": "Because their cost/benefit calculation (likely based on incomplete information) tells them it's a good option. Lots of parts of the middle east are very unstable, and offer poor economies and life chances. Lots of parts of Africa have few jobs, and lots of young people. They know that if they stay ... | null |
96e73o | Possible to change the temp of a liquid by stirring? | [
{
"answer": "Absolutely. One of Joules experiments was using a [weight powered whisk to heat water](_URL_0_). He was extremely careful in his work, including things like losses in the string, to arrive at what was for the time incredibly precise results.\n\nHowever the temperature change was subtle because wate... | null |
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