Subset (10)

eli5 · 25k rows

Split (1)

train · 25k rows

query stringlengths 20 300	positive listlengths 1 1	negative listlengths 1 1
Can you calculate how fast a roller-pin would turn if another spinning wheel came in contact with it? (specifically overt top of it, like a car)	[ "Yes, it just depends how precise you need to be. In the most basic terms, the roller will spin at the same tangential velocity as the car's tire. So if you know the speed of the car and the diameter or radius of the roller you can calculate the rpm of the roller. Of course this is only for the instant after the ca...	[ "A combination of peripheral vision and experience. Although you're not looking at the passenger side, you can still see it in your peripheral vision. And with a bit of experience (which you get while you're learning) your brain can take this information and work out quite accurately where the front passenger-side ...
Why do black girls often have huge asses while Asian girls have small ones?	[ "It's called [Steatopygia](_URL_0_), and is a genetic characteristic of Khoisan and Bantu people." ]	[ "From the exact same XKCD article that you linked: > (Climates can be hard to predict—for example, in our world, Somalia and French Guiana both sit on the equator, at the eastern coast of a continent, and seem like they should both receive a tropical sea breeze. But coastal French Guiana is dense rain forest while...
How do actors appear dead in movies and films so that their chest isn't moving from breathing and their heart beating	[ "Sometimes they don't. I love catching someone breathing during a tv show. Law and Order and Criminal Minds is a gold mind. Spotting moving corpses while watching is a running competition I have with my husband. I think the camera crew tries not to linger on them too long to reduce the amount of breathing on film....	[ "It happens when the TV screen is out of sync with the camera. Remember, the TV displays several images per second, and the camera records several images per second. So if the TV is showing 30 frames per second, and the camera is recording 50 frames per second, there's going to be a lot of times when the camera tak...
How does pain medication such as advil or tylenol “know” where the pain in your body is and how do they then go about counteracting it.	[ "Pain medicine works systemically. It does not \"know\" where pain in your body is. Various pain medications work in different ways. We're still not sure exactly what Tylenol (acetaminophen/paracetamol) does. Advil (ibuprofen) isn't a great painkiller, but it is really good at reducing inflammation, which can cause...	[ "IP addresses can be used for a rudimentary location fix, but they're typically rather inaccurate (limited to the general region at best). Much better location data can be obtained by analyzing which WiFi networks your device is able to see. Google has a database of WiFi networks and their physical location (send f...
Is asteroid belt spherical or ring ?	[ "It's a ring, and it's in essentially the same plane as the orbits of the Earth and the other planets from Mercury through Neptune." ]	[ "Hi, I'm Dr Jim Leary, lecturer in Archaeology and Director of the [Archaeology Field School](_URL_3_) at the University of Reading in England. I'm going to be here in AskHistorians to give an AMA on the 10th of November at 5pm GMT. I'll be talking about my work on round mounds, which included recently [discoverin...
How do atomic clocks work?	[ "atoms are composed of a nucleus (protons and neutrons) which is surrounded by a cloud of electrons that orbit the nucleus. this cloud of electrons has been observed to have some interesting physical properties that allow for a highly precise clock to be constructed by making very precise measurements of the state ...	[ "_URL_0_ The wikipedia article is excellent and better than any of the answers in here so far. If you have specific parts you don't understand, ask away and I can help explain them to you." ]
Eric Hobsbawm argued that the American revolution only had a lasting impact in the U.S. and the countries immediately involved in the revolution, whereas the French revolution was "a landmark in all countries." Does this accurately describe the global significance of these two revolutions?	[ "You might want to look at this [answer](_URL_0_) I have done previously. If you have any questions I will surely love to follow up." ]	[ "For the cathedral, they wouldn't just be building a new roof, it will be a restoration process which takes time. It is also a cultural heritage site which means it's important to history and protected by many rules and laws. Any plan to rebuild should be reviewed and approved by the pertinent authorities and the p...
Why do we use the Order of Operations?	[ "It's not an objective mathematical rule. It's just a statement about how we choose to write things down. Let's say we write down the string 1+2x3/4-5 It's ambiguous what exactly that means. Do you go from left to right? Right to left? Do you do certain operations first? The point of the order of operations is to r...	[ "It is hard to start a motor, it would take a long long time to start on low. Going 0 3 2 1 let's the fan start on High which gets it up to speed in a timely manner" ]
Can stars spit out elements we've yet to discover?	[ "Currently, for transuranium elements the heavier atomic weight is, the less is half-life. So, by simple extrapolation, heavier nuclei shouldn't really exist. Now, it has been theorized that there is an [\"island of stability\"](_URL_0_), where extremely heavy nuclei suddenly become stable. We are currently unable ...	[ "In terms of exoplanets one of the big goals is to do spectroscopy of their atmospheres, which would allow us to see their chemical makeup. This would tell us a lot about the conditions on these planets, and may also help in the search for life. For example, oxygen is very reactive and you wouldn't expect to see mu...
Why do explosions form mushroom clouds?	[ "You don't need a nuclear weapon to create a mushroom cloud, but it helps. First, you need a sudden release of a great deal of heat. This heat gets the air around the explosion to expand and become less dense. The air rises fast — creating a vacuum around it, that sucks more air toward the source of heat, and warms...	[ "Someone correct me if I am wrong but it goes back to when we had much hairier bodies and when alarmed we as well as a lot of other mammals would puff up our hair to make ourselves look bigger. Think of how when you scare a dog or a cat it hunches up and its hair stands on end, same thing happens to us just we dont...
What are the historical context behind Serbians and Bosnians being two different peoples?	[ "Your question is begging the answer that Serbians predated Bosnians/Croats, which is incorrect. All three are linked to proto-Slavic groups, yes, but came to inhabit the Balkan region separately. Bosnian ancestry literally in Bosnia, with a secondary wave of Serbs and Croats in other areas of what came to be known...	[ "Could you perhaps present us with your original source so we can see what the author writes about it? I think I know the answer, but I would like to know what exactly the author wrote. Also, could you remove the bonus question? We do not allow discussions of events after 1993." ]
Why are employers so anal about "gaps in employment?"	[ "Most people have bills to pay and have obligations to meet monthly... so when they see gaps in your employment that means that a) you sponged off of someone else or b) didn't pay your bills or c) don't need to work to make money for whatever reason. It also shows that you're able to be impulsive... that you could ...	[ "The computer has files of varying sizes. These take up varying amounts of spaces on the hard drive. Say you write to the hard drive 3 different files. One takes up 5 \"spaces\" the next 2 spaces, and the last 5 spaces. Later, you delete the 2 space file. Now you've got 5 occupied spaces, 2 free spaces, 5 occupied...
Why was the population of Ottoman Empire so small?	[ "15 million was a very large population at the time. The France comparison is more impressive than it seems at first-- until well into the early modern era, the French comprised one quarter of the population of Europe! (Read a little further down the wikipedia article you linked, [it discusses France's demographic ...	[ "What period and country are you asking about? There’s no context in your question." ]
If we open a radiation emitting device like a microwave before intended stoppage time, how do we know that the radiation won't escape out into the space around us?	[ "There was a recent paper submitted to MNRAS on the origin of radio bursts called [perytons](_URL_0_). These are very short duration (roughly millisecond) bursts that look sort of like [fast radio bursts](_URL_1_), but they aren't localized in one spot on the sky, so they've been known to be terrestrial in origin. ...	[ "Microwaving food cooks it unevenly, because things like water heat up much faster than things like fat. Microwaving for a long time on low gives more time for heat to spread by conduction through the piece of food, so you get a more even spread of heat." ]
Why are word problems so difficult?	[ "From my lay perspective, it's because the word problems are designed to confuse. They include extranious information that's irrelevant to the problem, and are therefore testing your ability not only to do math, but to retrieve only the information that you need. I have to re-read them a few times as well - my gues...	[ "Yuo can raed taht way beauce we dno't acluatly raed ervey letter in a wrod, we raed the shpae of the wrod. It's sungrisiprly esay to raed tihs, but relaly anoyinng to write lkie tihs, so the rset I copeid form the intnernt. \"i cdnuolt blveiee taht I cluod aulaclty uesdnatnrd waht I was rdanieg. The phaonmneal pwe...
What happens to an individual photon when traveling through a prism? Does only white light travel at the speed of light?	[ "There is nothing like \"white\" light, as white contains all colours. Every electromagnetic wave travels at light-speed, this is true for light, radio waves, microwaves, X-Ray, gammaradiation and so on. A prism refracts light. But the way light intracts with the electrons of the denser material glass is dependend ...	[ "Whenever you see that rainbow surface, there is usually some interference going on. Which means that you have a thin film of something and light rays of different wave lengths are reflected in such a way that some wave lengths are canceled out depending on the angle you look at it. Another example would be oil on ...
Do passing asteroids have an effect on for example the tides?	[ "What's interesting about gravity is that it has an infinite range, which is not true for the other 3 forces (strong, weak nuclear and magnetism). Because of this, you could say that every atom of matter in the universe has an effect on the tides of our oceans, this includes you! You walking around has an effect on...	[ "> it did stay on orbit for over a year... How? A neglected switch resulted in Apollo 16's lunar module tumbling after separation and its deorbiting rocket burn was not executed as planned. > How it crashed if on the Moon there is no atmosphere to drag it down like on Earth?? A [\"mini\" satellite](_URL_1_) relea...
Is basic water as bad/harmful as acidic water?	[ "The reaction of calcium carbonate + acid will only proceed until it reaches equilibrium (the acid is used up). This is because the huge volume of limestone involved acts a a buffer material. Perhaps this says it better: > Water percolating from the surface contains atmospheric gases. One of these gases is carbon d...	[ "The ingredients in shampoo are designed to make your hair soft and shiny whilst maintaining natural oils. Body wash is usually just soap based. Using body wash on your hair will clean it but can leave it feeling dry and less manageable. Using shampoo on your skin can cause irritation and/or a slimy feel due to the...
Why are porn sites more likely to infect the user's computer with viruses than other sites?	[ "Impulse clicking. People are more likely to ignore warnings to see a naked chick than to read an insurance quote. The are also more likely to be embarrassed about what they were doing and not report it. Scammers know this, are are much more likely to use porn sites to deliver malware." ]	[ "There is a back door into every house. People put alarms all over their house. Have a key? You can get in the front door. When you need to break in you use the back door. Now only bad people use the back doors. So when someone comes in the back door, the alarm goes off. Your crack is a bad person, technically. He ...
How can _URL_0_ keep all those photos stored on their servers?	[ "Why don't you ask MrGrim himself. He is a regular at _URL_3_" ]	[ "The terms of service take the form of a contract. In terms of enforcement, it's no different to any other contract. If either side feels that the other side isn't sticking to the terms of the contract, there may be provision made in the contract for some penalty (if you don't do this we will add XXX dollars to you...
How is Schizotypal Personality Disorder different from Schizophrenia?	[ "\"Schizotypal personality disorder can easily be confused with schizophrenia, a severe mental illness in which people lose contact with reality (psychosis). While people with schizotypal personality disorder may experience brief psychotic episodes with delusions or hallucinations, the episodes are not as frequent,...	[ "[The Straight Dope covered this](_URL_0_). Basically, they started out as being made by two different production teams, but after a certain point, they became essentially interchangeable, but they kept both names going." ]
Why is "wrap text" not the default setting on excel and similar programs for when writing is longer than a cell? I've never had a situation where I preferred the text to go over into the next cell.	[ "Excel was designed to work with numbers and math, however many today simply see it was a go to tool anytime you want text in a table format. That's fine, but it's not what it was designed for. Actual text (vs numbers and formulas) was envisioned to be pretty rare, limited to column and row titles. To each his own....	[ "OK, well, let's try it! We'll make a Ferrari-looking car for the common man, instead of the boxier shapes we currently have! Wait, hang on, we'll need to raise the body a bit from the wheels. This isn't going to be used in racing conditions, it could be used on any road, even gravel. Don't want to have rocks cons...
Why are some animal's eyes highly reflective while ours don't seem to be at all?	[ "Because of something called [tapetum lucidum](_URL_0_). These are structures in the eye that act sort of like a prism and reflect around so that it concentrates it within the eyes. This gives the animal better night vision. As to the second part of your question, why our eyes don't shine much with light, that's th...	[ "Looking at an object in a mirror is the same as looking at the object at a distance of (distance from you to mirror) + (distance from object to mirror). To see something, light travels off of an object, through the pupil and to the retina. The pupil focuses this light so that lands correctly on the retina. Blurry ...
Does every cell in our body contain all of our DNA?	[ "Most cells contain all of your DNA but there are cells that do not, the best example being your red blood cells which are basically bags of hemoglobin and lack both a nucleus and the DNA contained within it." ]	[ "Yes in a sense- but you need to understand how computers treat deleted data. When you delete a file, its not actually deleted from memory, the OS just modifies the memory so it says ' there's nothing here' instead of ' file A is here'. So next time the OS is looking for space to put a new file, it may overwrite fi...
Franz Kafka and the meaning of "Kafkaesque".	[ "Franz Kafka was a writer. His stories are full of situations in which people are restricted or mistreated for apparently no reason. The situations never seem to make sense and there aren't any options to escape them. For example, in The Trial, the protagonist is suddenly arrested and charged with a crime. He's ...	[ "Niépce's house is now a [museum](_URL_1_) and photography is not allowed inside, so unfortunately there is no modern photograph of the view from the window that I can find. That said, [on the website of the Harry Ransom Center](_URL_0_), you can see a sketch done by the historian Helmut Gernsheim, who rediscovered...
Why do scars and previously broken bones ache when there is a change in weather?	[ "Orthopaedic surgeon here... The real answer is that we have no idea. Some people will say that it has to do with pressure changes in the atmosphere and how that effects scar tissue or healing fractures. However, this doesn't pan out when you actually try to look at it. Not everyone gets this sort of pain, and even...	[ "because the spices contain capsaicin. Capsaicin binds to your receptors, and literally makes your brain think youre on fire, which sets of all of these alarms, so your nose starts running, you start sweating alot more, you crave something to drink. Just remember, water doesnt work as its polar, while capsaicin is ...
How does YouTube's content ID benefit YouTube, and isn't it just harming the little man?	[ "Google could not care any less about the \"little man\"" ]	[ "In addition to what has already been written : - the EU started with 6 members, and was supposed to be limited to very specific stuffs (open market). They made rules accordingly : some decisions must be taken unanimously, and others by majority. - Now we have more than 25 countries. And the UE rules a lot more tha...
Why did Nixon record his tapes?	[ "It's important to note that Nixon was not the first president to do this. Audio recordings in the oval office started with FDR, initially for the purpose of recording press conferences. Nixon did innovate a little, in that his system was voice activated instead of manually activated, but by the time he was preside...	[ "This is a very common question. You can use search to find [all the other really good answers](_URL_0_ ). This is instant, and faster than ust typing in your question every time. It's a way of cheating elections. Read the others, and then ask a more specific question." ]
If certain images such as van Gogh's "The Starry Night" are in the public domain, how are reproductions able to be sold?	[ "Public domain means the opposite of what you're imagining, when something is in public domain it means anyone can freely use it for any purpose (including profit) without needing to pay anyone. Anyone can take a book or movie or song that's in public domain and sell it without needing to pay royalties or fees." ]	[ "To quote the great pop song from the '70s;Money, Money, Money, Money. MONEY.\" The record studio's pay the radio stations to play their songs. Simple as that." ]
Are scientists sure it was WATER found on Mars? did they confirm it molecularly to be H2O or could it potentially be another clear liquid?	[ "The spectrometer on the Mars Reconnaissance Orbiter was pointed at the Recurring Slope Lineae, and it found spectral signatures that are unique to perchlorate salts. Since these lineae flow downhill in the summer, it means that the salts are being brought to the surface and then transported by a liquid of some kin...	[ "Me and a buddy of mine at a NASA internship got a chance to get inside the JPL cleanroom the Curiosity was assembled in. He had to take 2 special showers before he went in, and wore a special anti-static robe, mask, and hairnet. Before they let us in they detailed the extraordinary precautions they take before let...
What physicaly happens when you increase the volume of the music (on your phone for example). How does it work ?	[ "You send a larger pulse of electricity through an electromagnet which makes the conic part of the speaker repel further away from the magnet. There's a great explanation here: _URL_0_" ]	[ "Essentially, yes. The reason your foot doesn't go through the ground is because of the electromagnetic interactions between matter. The fact that they can't collide means that the kinetic energy of your shoe is transferred. Some goes into the ground as heat, some goes back into your foot as heat and as reverberati...
Why does having different numbers of protons change the properties of different elements?	[ "The number of protons relates to the number of electrons, which impacts to how the atom interacts with other atoms. At the molecular level, different atomic bonding pattens, shapes, and configurations, which impacts how the molecule behaves with other molecules. It's about the interactions and behaviors" ]	[ "They use [spectrographs](_URL_0_), a device which measures the light that comes off that planet. This works because most substances have their own spectral fingerprint, which is very recognizable. For example, if you hold salt in a candleflame and look at the spectrum, it will have a bright orange emission line, ...
Would it be possible to independently determine what 1 volt is without a frame of reference?	[ "I would suggest looking into how we build circuits that take a variable DC level and convert it to a sometimes very accurate stable, different DC level. [Voltage references](_URL_0_) to start. [Bandgap voltage references](_URL_3_) [Ohm's law](_URL_2_) was formulated in 1827. [Properties of a diode discovered in ...	[ "Voyager has a sun sensor and [star tracker](_URL_0_) that keeps track of the star Canopus. There are a number of thrusters so it can adjust its orientation and it has 3 gyroscopes to keep it stable. I believe the location and speed are calculated values and somewhat approximate. Since there is no friction velocit...
If you get paralyzed, does your body go limp or stiff?	[ "Your body can do both. If you lose complete control over a nerve, then that limb is unresponsive and limp. This happens to people who suffer spinal injuries and if the muscles arent being used, they begin to break down and be recycled which is why paraplegics generally have very thin legs. If you have a stroke or ...	[ "I'm sorry, I'm not clear what exactly you mean. Is the goal of playing dead to ambush the enemy somehow or is it to escape unharmed? Either way, it would be a fairly risky idea. Medieval soldiers (and locals near the battlefield) saw it as their right to loot the dead and wounded, and would often either kill wound...
Most babies are born with blue eyes that change over time. How does this happen? Why aren’t we born with our genetically determined eye color?	[ "This isn't the rule. It happens a lot with caucasian babies because they aren't born with the amount of melanin that they will have it develops overtime." ]	[ "Liking certain tastes is genetic. Sweet and salty are universally liked since liking these flavors led ancient people to seek out foods with necessary vitamins, minerals and other nutrients. Aversion to bitter is said to help in avoiding toxins. How one tastes things is to some degree genetic- cilantro tastes wond...
Why are Java updates so intrusive and freightening?	[ "Huh, what about it is intrusive and freightening? All you have to do is click the notification and it should install the update. Java is one of the easiest things to update. You can also set it to auto dl all updates. If your Java updater is doing anything else, then you probably do have a virus or some other ...	[ "Because the types of permissions people are usually concerned about are usually... * Location data, either current or past * email, phone contacts The vast majority of laptops and all desktops do not have GPS chips, so location data isn't a concern. While people may store email addresses and phone numbers on their...
Why is "Toe" pronounced as "tō" and not "toō" as opposed to "Shoe" pronounced as "Shoō"?	[ "The most important thing to understand about English is that it makes no fucking sense. \"Lester\" and \"Leicester\" sound the same. Lead rhymes with read, lead rhymes with read, but lead doesn't rhyme with read. slough, through, and tough don't rhyme. [a great example](_URL_0_)" ]	[ "Lower right corner, there is your tray, click on the icon that looks like a keyboard, and change the setting to US English, or just US. If you don't have this little icon, look for a little taskbar that can be anywhere on your screen, usually at the top. Change it to US settings. It happens whenever you change yo...
Did the printing press cause any major shifts in monastic life in Europe?	[ "I hope this previous reply is useful: [\"What happened to the scribes and monks after the European printing press became common? Did they campaign for it to be banned and destroy presses?\"](_URL_0_) , replies by /u/sunagainstgold . This is just a starting point, not to discourage further questions, data, or debat...	[ "I've deleted this post. \"Throughout history\" questions, as stated in our rules, [are too broad for this subreddit](/r/AskHistorians/wiki/rules#wiki_no_.22in_your_era.22_or_.22throughout_history.22_questions). Moreover you're obviously trying to make a point about the way this subreddit is run which makes me doub...
Why do Asian countries have a much smaller rate of obesity than the US?	[ "The USA was not an obese country until after about 1971, when government policy was changed to support the high production and low price of staple foods like corn, wheat, and soy. The government was worried about preventing hunger, but they went too far. Now we are surrounded by high-calorie food all the time, to ...	[ "Horse meat isn't rare at all. You can get it in many parts of europe. Tastes ok too. Anyway, that's culture. The same reason we think that bacon and eggs is a breakfast food, and don't eat grasshoppers." ]
Why are positively charged particles attracted to negatively charged particles?	[ "Positively charged atoms have 1 too few electrons, negatively charged atoms have 1 too many. All atoms want to be of no charge and want to have full valence shells, so they get together and pretend they are one uncharged molecule." ]	[ "They are both forces. For instance, the Earth pulls on you with gravity, a force of magnitude F, in a direction toward the Earth's center. Newton's third law then says there must be some other force that has the same magnitude but acts in the opposite direction. Indeed, you pull on the Earth with a force of magnit...
What is proper gym etiquette?	[ "First and foremost. Clean the fucking machine after you're done. There is nothing more disgusting than some lunks ball sweat all over a bench because he was too big of a douche to clean it." ]	[ "We're not supposed to use our phones at gas stations?" ]
How the moon affects the oceans	[ "Like any object, the moon has gravity. That gravity holds the moon in orbit, but is also pulls on everything on Earth. On any individual thing on Earth, the pull is very minimal compared to the pull of the Earth, but when applied to all the water in the oceans, it's sufficient to cause it to bulge slightly. Couple...	[ "From the exact same XKCD article that you linked: > (Climates can be hard to predict—for example, in our world, Somalia and French Guiana both sit on the equator, at the eastern coast of a continent, and seem like they should both receive a tropical sea breeze. But coastal French Guiana is dense rain forest while...
Are the magnetic north and south poles necessarily antipodal of each other?	[ "Nope. Without even knowing their exact locations I can say this with certainty as I know that the North pole is wandering faster than the south. The geomagnetic field is not strictly a dipole it just appears so at large scales. At the core mantle boundary right where it is independent of the region that it is gene...	[ "Get a protractor, tape or glue a straw to the straight edge, and tie a weighed down string to the middle. When you get on the plane, look down the straw at a star that you can easily pick out from the night sky (hope you're travelling at night!) and is viewable from both hemispheres, and mark where the string hang...
Why does Enterobacteria Phage T4 look so bizarre?	[ "Here's one as seen on an electron microscope: _URL_0_" ]	[ "Because those are all special characters used by othe purposes by the operating system. /\\ are directory separators : is used for the drive letter/device name in Windows * and ? are wildcards < and > are used for redirection symbols “ is used to allow spaces in filenames." ]
Why do YouTube URLs contain a mix of uppercase and lowercase letters if URLs aren't case-sensitive?	[ "Because the statement \"URLs aren't case-sensitive\" is not true for all situations. When you see something like \"?v=Ab12Cdefgh\" at the end, that is something called a \"Query string\". It means that you're actually telling the web server that it should make the value of some variable 'v' be \"Ab12Cdefgh\". Whe...	[ "UNC or \"Universal Naming Convention\" is just a common naming convention used in Windows for different shared resources on the local network. The general schema is \\\\\\\\ < device name > \\\\ < share name > \\\\ < optional path > . So let's say I have a several computers at home, and they are connected to my h...
why is it that people use underscore "_" instead of "-" when programming	[ "In many languages \"-\" means \"minus\" which means it breaks things when you just use it as a separator." ]	[ "Imagine you take the space between 1 and 2. Now you want a number that’s just slightly smaller than 2, say it’s 1.9 now let’s say that you want a number that’s in between those say it’s 1.95 this can keep going on forever as no matter how small the difference is you can continue to create a number that is slightly...
How can certain presidents serve almost entire terms without vice presidents (ford, Jackson, Roosevelt), who takes over the vps duties and why isn't a new vice president chosen?	[ "Because at that time there was no provision for filling the vacancy of a vice president. It was only added with the [25th Amendment](_URL_0_) in 1967. Otherwise the Vice-President doesn't actually do a whole lot of real functions, just look at what Biden has done this entire time. If a new president got kille...	[ "Captains wont intentionally kill themselves no, but they are supposed to be the last ones off since they are responsibly for all crew and passengers. > \"The captain goes down with the ship\" is an idiom and maritime tradition that a sea captain holds ultimate responsibility for both his ship and everyone embarke...
Labor party vs Liberal party vs the Greens (in Australia)?	[ "Remember that when you're voting you need to give a preference to each party and can even decide to Vote 1 for a small party you haven't heard of before (or, if you live in the electorate of Grayndler, Meow-Ludo Disco Gamma Meow Meow because you like the name - but seriously don't do this without researching the p...	[ "The technologies you are referencing are what type of connection you have to the internet provider's backbone to the internet. * DSL internet uses phone lines * Cable internet uses TV lines * Fiber internet uses fiber optic lines (speed of light transfer, well... 2/3rds speed of light) Generally, Fiber > Cable > D...
Is there any chemical acid that can dissolve Uranium or Plutonium?	[ "Uranium and plutonium are generally reactive. Not sure about plutonium, but most common acids and oxidising agents can react with or dissolve uranium. The reacted products of uranium especially its oxide and halides are extremely useful. The oxide is a chemically stable form and used for transportation or disposa...	[ "A similar design was at least mentioned for Project Plowshare, and it considered detonating nukes inside the earth's crust to heat up underground water. It does not seem to have a code name, only known as \"Geothermal Power Plant\" as far as I know, so it would seem there no detailed plan was even created. Just be...
Where did Hell's Kitchen, NYC get its name?	[ "Well, there are competing theories, none of which is all that convincing but which are fun. This happens with local names and such. It is interesting that there was a London slum also called Hell's Kitchen, which is attested earlier. Perhaps someone borrowed the name. (Though independent invention is always possib...	[ "Many high end restaurants (or restaurant suppliers) get first pick. Particularly when it comes to meats and other things that spoil quickly. How many people at your supermarket are willing to pay top dollar for prime or whagu steak? Vs people going to a steak house." ]
why do we stop enjoying some things we used to enjoy when we were younger?	[ "I think we develop a \"been there, done that\" mentality in ways. I can not watch cartoons now. No matter what the topic. The irony is I just can't pay attention to cartoons." ]	[ "_URL_0_ Link to similar ELI5 about a year ago TL;DR You cant remember because the part of the brain that controls short term memory is one of the first that shut down" ]
How is fire modeled/simulated?	[ "Yeah it's very hard to model (or more accurately computationally expensive). The most basic way to do this is to simulate it as a fluid (since it's hot gas) that has energy being fed into it at the bottom and energy escaping at the top. Software like COMSOL or ANSYS do this by combining thermal and fluid models. I...	[ "These days rendering is pretty much real-time for those, so it's not an issue. It is complicated, but a modern software is so advanced, that is doesn't have a problem to track 1 ball and 25 (including referees) people on the field." ]
If the winters in Westeros last for years and it takes sometimes a decade for the seasons to change, how do trees grow?	[ "Magic. Or Dragons. Take your pick. Seriously, it's a work of fiction. Unless George R. R. Martin has explained it somewhere there isn't an answer." ]	[ "Yer not alone in askin', and kind strangers have explained: 1. [ELI5: how do the time differences between planets work in Interstellar? ](_URL_6_) 1. [ELI5:Interstellar's relativity of time. ](_URL_3_) 1. [ELI5:[Interstellar] Time moves faster is some places in space than others. ](_URL_0_) 1. [ELI5: Aging in the ...
A reverse hydrolysis (if possible) would release energy?	[ "Hydrolysis of water definitely has a reverse reaction. It's called \"oxidation,\" or more commonly, [\"combustion.\"](_URL_1_) & #x200B; You can absolutely burn hydrogen. And you are correct - it [releases quite a bit of energy.](_URL_0_)" ]	[ "We aren't really sure why, but it doesn't seem that something like that can be done. Think about it like your bladder; you can build up a need to urinate, but you cannot urinate so much that your bladder is more than empty." ]
Why does the flame of a candle go up?	[ "The flame of a candle is about 1200 F. Hot air rises because it is less dense so this pulls the flame upward. Fun Fact: There have been experiments conducted on the space station testing flames in microgravity. Since there isn't really an \"up\" without gravity, the candle flame spreads out in all directions and ...	[ "Basically, your blood pressure is higher than atmospheric pressure. Fluids (air, blood, etc) always flow from areas of high pressure towards areas of low pressure." ]
How do you convert rotational motion into energy that can charge a battery?	[ "Put a magnet on the rotating body and have it move past a coil.. Or put the coil on the rotating body and the magnet stationary... That's how a generator works" ]	[ "Most smartphones these days have magnetometers (fancy word for electronic compasses) built in to them, as well as gyroscopes and accelerometers. They use these circuits to determine orientation in space and rate of change of speed. You see this when you play many mobile games that use the orientation of the phone....
Cornell has created a "Time Cloak" effect by slowing down and speeding up lasers. What does this have to do with time?	[ "It's a grossly misleading article representative of the horrible state of popular science reporting. Light always moves at light speed, and cannot be changed. You can create the illusion of a changing speed by absorbing and re-emitting photons (lensing), and that's pretty much what they're doing, if in a slightl...	[ "Have you ever wondered what's inside your bouncy ball? Imagine it was too small to cut but you really, really wanted to know. What you might want to try is throwing it into something so hard that it breaks and you can see the smaller parts. Of course, if you only have another bouncy ball because that's the only th...
Did Chinese forces really ride horses wearing gasmasks towards a surface test of a nuclear device as shown in this video? If so what was the context/motivation for doing this?	[ "Are they really? I never see soldiers and the blast in the same from, except maybe kinda-sorta at 3:08. It all looks like editing to me." ]	[ "You may be interested in these earlier posts which touch on the purposes of public execution * /u/idjet in [During medieval times public torture and execution was commonplace, how did this effect the general population, did they become desensitized to gruesome death?](_URL_2_) * /u/TheFairyGuineaPig in [Are there ...
This might be startlingly ignorant, but: why are sunny days in the winter still cold?	[ "The reason that the tilt makes it more cold in winter is not distance. Yes, the sun is less bright the further out you travel from it, due to the spreading of the light. The reason that the winter is colder is because when you have the surface at an angle to the incident light, you're taking a lot less of the angl...	[ "Ultraviolet light penetrates the skin and strikes a compound in our blood called 7-Dehydrocholesterol. This converts it to another compound which eventually becomes vitamin D3. The sunlight itself isn't turning into vitamin D, it allows our body to produce it, since it contains the right kind of UV light to stimul...
When did it become acceptable to be openly critical of the church in Europe?	[ "I think one of the constants that you can see throughout the history of the Church is the cry that it must be urgently reformed, that the majority of priests are terrible, ignorant, and immoral, that all the monks are too busy getting drunk and banging farmers' daughters to properly praise God, and so on. And you ...	[ "This is a broad question do you have a specific time period or place in mind?" ]
How am I consuming no energy when I drink diet soda?	[ "It would be more correctly labeled as, \"less than half a calorie of metabolizable energy per serving,\" but that isn't nearly as concise. There are chemicals in the soda, of course, but the most of the ones that are there are not the type that our body can use for energy even though they taste sweet. Some artific...	[ "Nutritional labels are for this that the body metabolizes. The body doesn't metabolize aspartame. Nor does it yellow #5." ]
How do surgeons reattach bones, nerves, and blood vessels?	[ "I rotated in vascular surgery for four weeks about a year ago, and I participated in many carotid endarterectomies, peripheral bypasses, and abdominal aortic aneurysm repairs (among others). The larger arteries involved in these surgical operations are easy enough for surgeons to sew together using a non-biodegrad...	[ "Evolution doesn’t routinely do luxuries. Can your current form and life-processes keep you alive in your current environment long enough to breed the next generation? Yes? Then you are “successful enough”. Rinse, repeat, refine through those generations. If the need to regrow limbs and organs was the only thing ke...
What were the largest empires that existed simultaneously but (for the most part) unaware of each other?	[ "Han China was roughly contemporary with the height of the Roman Empire, but I wouldn't say they were unaware of one another. They traded indirectly through the early Silk Road, and certain goods from one empire were highly prized in the other. Roman glass was popular in China, and of course silk was popular in Rom...	[ "1. In the last 48 hours I've received the proofs for my latest article and also news that a conference I attended last summer will be developed into not one but two volumes in Palgrave Macmillan's Languages at War series. It's a good thing I enjoy writing, because it seems like I'll never get to do anything else...
The mechanisms of voting in the US and the controversy about requiring government ID in order to vote	[ "First, the US does not have any nationwide universal ID. Instead, each state issues its own ID (typically a Drivers License or similar) or there are photo IDs for members of the military. 2nd, a LOT of people don't have a driver's license. If you don't have a car, you don't need one. This primarily impacts the eld...	[ "There's probably some confusion, and they probably know someone with Down's syndrome so you might have hit a nerve. Perhaps they were confusing gene therapy with the current solution: genetically testing fetuses and aborting them. Some people take issue with that. Perhaps they were confusing gene therapy with eug...
Does the accelerating universe have a maximum velocity?	[ "Indeed the expansion is due to space stretching between objects, which happens at roughly 70 km/s per Megaparsec (Hubble constant). As you can see the relative \"velocity\" between two objects only depends on distance, which means if two galaxies are sufficiently far away from each other there is nothing to stop t...	[ "> Do bigger accelerators mean better results? In general, \"bigger accelerators\" means higher intensities and higher energies. These are the two basic things we need to push the limits of our understanding. On the frontier of particle physics, you need higher and higher energies to look for new particles which ha...
How do locksmiths verify that you own a key before making a copy of it?	[ "Unfortunately there isn't always a way to tell. There are mechanical kiosks at big box stores that copy keys for a small price. In that case there is no verification, like you said - There's no proof that you aren't a theif required for copying a key. Edit: That's why most landlords buy keys with \"DO NOT COPY\" ...	[ "They don't. It's a marketing ~~lie~~ gimmick. I used to work for a company that did a similar thing by mail. New customers were supposed to sign up by a certain time for special rates but as a specific matter of policy we'd give those rates to anyone who mailed back the special offer." ]
How does the inner voice inside our heads work?	[ "Language is really just a way to formally organize your thinking. It is a great tool for doing this, and like any other tool that is good at its job you will naturally gravitate to using it. For example: you can add. If i tell you to add five to seven, you are not going to count in your head \"Seven, eight, nine, ...	[ "It doesn't. Scientific studies on neuro-linguistic programming have shown it to have no effect. _URL_0_" ]
There is no/less Russian spy novel of cold war period?	[ "There are actually some Warsaw Pact versions of Bond. The most famous is by Bulgarian author Andrei Gulyashki. His character Avakum Zahkov is a counter-espionage agent with above-average intelligence and devotion to the system. Many of his missions involve the protection of scientists and various technological adv...	[ "Like what? I think you do need to be more precise in what you're looking for, unless you'd like us to recommend books all about Victorian undergarments. What you or \"lay people\" don't know about is really subjective." ]
Why doesn't the light travel through my glasses? (I.e. why is there a shadow where the lenses are?)	[ "You are short-sighted. I can tell becasue your glasses have \"negative\" lenses, which cause a beam of light passing through them to diverge, to spread out. You can see the light which has been diverted in the brighter halo around the shadow of your glasses. If you were long-sighted you would glasses with lenses w...	[ "Depending on the level of detail you want from the final render, you have to calculate the properties of every given point in your 3D model. This includes lighting, material properties and so on. Any surface reflects light differently, they interact with each other, reflecting or being illuminated by different sou...
Is everything made up of forces?	[ "This paper might be of interest; it starts off fairly non-technical. _URL_4_" ]	[ "Sort of, but it's an immeasurable amount. It's equally interesting to think that the entire earth moved upward just the tiniest bit to meet the feather (also immeasurable)." ]
How is a sponge able to hold a higher volume of water than itself ?	[ "There are 2 interpretations of your question. 1. The sponge can't hold more water than can physically fit in the dimensions of the sponge itself. For example, if the sponge has volume of 1 liter, it can't fit more than 1 liter of water. 2. The sponge is mostly empty space, so it can fit more water than sponge mate...	[ "There are two ways: Pile Driver: Big machine that shoots giant metal rods from the surface, through the water, and into the seabed. Coffer Dam: Workers build a wall around the site and then pump out all the water. Then they climb down and pour concrete in the seabed." ]
How come an Xbox, which features 6 year old hardware, can run modern games smoother than my recently built PC?	[ "Most popular games come out on the Xbox 360, the PS3, and the PC. Out of the three choices, the Xbox 360 is the most popular and has the oldest hardware, so the games usually get designed to run really well on the Xbox 360 first. After the game is done, they really quickly make versions for the PS3 and the PC, the...	[ "Are you watching blu ray? Is it a good transfer? (Example: despite being made in the early 80's Blade Runner Ultimate Director's cut blu-ray is one of the best you can buy) How good is your blu ray player? Is it a ps3? All of these factors contribute to what you determine as a home viewing experience being inferio...
Are Black Holes Permanent?	[ "No. They eventually evaporate via Hawking radiation. For a steller mass blackhole it will take more than 20,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 years to evaperate." ]	[ "If we ignore the fact that there is no perfectly reflective material, and the fact that it would be ~~neigh~~ nearly impossible to introduce a photon into this box without letting it escape almost immediately ... then yes the photon would stay there forever. On the other hand, if we construct an hypothetical scena...
Why do we sometimes get single, very painful, giant "tastebuds" randomly on our tongues?	[ "They're not single taste buds but groups of taste buds that have been inflamed. There are many causes of swollen taste buds and they usually will go away after a day or two and don't require medical attention. The most common cause is the consumption of spicy or salty foods. This can damage the nerves on the tongu...	[ "Your body is covered with specialized sensory cells. Each sort responds to a certain thing, and transmits that information to the nerve. One type responds to heat, another to pressure, etc. Since the method they use to detect things is different from each other, the sensations are different too. Your brain transla...
Periodic table layout?	[ "It is simply a compromise between organization, usability, visual appeal, and strict adherence to some ordering rule." ]	[ "We use spectography. Each element absorbs particular colors, so when we see those colors deleted from an otherwise smooth spectrum, we can figure out what they're made of. In the case of." ]
What would happen if Literally EVERYONE voted in the U.S. for a written in Candidates?	[ "If one write in candidate wins the majority of electoral votes then no the house doesn't have to vote. But keep in mind that some states don't allow or count write in votes. Thankfully that's 43 out of the 50 accounting for a total of 493 votes up for grab for the write ins. There's a catch. The candidate has to...	[ "Same reason you don't keep turning the ignition key for hours in your car when it won't start -- there's no point in doing it, it won't get better." ]
How are LEDs brighter and more powerful, yet use so little energy?	[ "You know a lot of light is invisible, right? Infrared, for example. You can't see it, but you can feel it on your skin with your eyes closed when you're standing near something really hot. Take two lightbulbs that consume exactly the same amount of electric energy, but one produces only visible light, and the othe...	[ "Short answer: inductance. A transformer with an open secondary is a simple inductor. With a sinusoidal source voltage the primary current is proportional to the inductance. Fewer turns, lower inductance, higher current. Calculating the optimum number of turns, wire gauge, and core size is complicated." ]
How did Bungie spend $500M on Destiny when it literally just uses the same 4 maps for every mission and has no story?	[ "That $500M number came from Activision/Blizzard. Bungie denied that is an accurate number. Development time is the largest money sink. You're paying a staff for over 2 years to create the game (on a custom engine)." ]	[ "Travel, opening campaign offices in each state, television and radio ads, and paying everyone who works for the campaign, from those who research your opposition, to those who manage your website -- it's a year+ long process with a lot more than a few speeches and shaken babies." ]
Why don't seeds sprout and grow when they are inside of their fruit?	[ "They can. In many cases fruit sold in stores is immature so they don't spoil during shipping. As a result the seeds don't sprout as often. Also some seeds need certain conditions before they will sprout reliably. Some need to be cold for a time and then warm to sprout -- so they will sprout in the spring, some nee...	[ "Think of it in groups, where the top 2 teams in each group continue on to the next round. Let's assume, in the next round: * The Winner of Group A plays the 2nd place team of Group B * and * The Second place team in Group A plays the winner of Group B If the 2nd placed team of Group A was a particularly strong tea...
French Resistance action against the "Gestapo Headquarters" in Paris?	[ "Could also have been there _URL_3_ or there _URL_6_ The main gestapo officers in Paris were _URL_5_ _URL_4_ _URL_2_ (the english wiki articles are less detailed). Nothing particularly relevant to your question however. It is notable that the French Resistance started \"pulling jobs\" mostly from august 1941, an e...	[ "Could you perhaps present us with your original source so we can see what the author writes about it? I think I know the answer, but I would like to know what exactly the author wrote. Also, could you remove the bonus question? We do not allow discussions of events after 1993." ]
why do cherry flavored things taste bitter while actual cherries are sweet and sour?	[ "I absolutely hate fake cherry flavor... I didn't eat cherries for 21 years of my life because I thought they all tasted like cherry candy..." ]	[ "Skin is made from 7 different types of layers, but on your lips the top layer (called the stratum corneum or “corny layer”) is very thin. This, combined with lots of nerve endings in your lips, helps you get a lot of textural information about food and other things you put your mouth to. (Think of how a baby tries...
Why does my face get oily almost immediately after eating greasy food like pizza	[ "Because you touch your face A LOT. The typical person - according to many observation studies - touches their face 2-4 times PER MINUTE by some estimates or 2000-3000 times per day (which is less frequently than 2-4 times per minute!). Grease on fingers, grease on face." ]	[ "There's accumulating evidence that epigenetics during pregnancy has an influence on obesity of the child. See, for example [here](_URL_0_). This result is interesting because it highlights the impact of diet on offspring: when rats are fed a normal diet, they remain slim. When rats are fed a high-fat diet, rats fr...
Why are babies born head first?	[ "Well childbirth will be painful because of contractions besides the head first thing. Besides the birth canal has to stretch eventually to let the head out, so both ways the mother will feel pain. The reason the babies are born head first, is that if the baby is born body first (note body needs less stretching of...	[ "Facing into the wind is my guess, but they are very social creatures so may just be following dominant hierarchies (follow the leader)" ]
Why when stuck in traffic does it seem to clear up for no apparent reason, in addition how was the traffic formed at that spot to being with?	[ "Traffic snakes. [This](_URL_0_) video goes into detail about them. They are caused when someone slows down or stops randomly in a packed highway. Never slow down in a packed highway unless absolutely necessary; you'll be the cause of a traffic jam a quarter mile behind you." ]	[ "Google Android has a feature that sends location data to the google servers, even if you have GPS turned off. If you use a Google Android phone, you can actually view your own data if login to Google and goto this site: _URL_0_ What Google is doing is fetching all this data that is sent from all the Google Android...
If your clothes aren't dried properly, why do they go sour/smell bad?	[ "Microorganisms like bacteria and fungi are the actual cause of the smell, more specifically the waste that these micro critters produce. Similar to body odor, the micro organisms thrive in moist and warm conditions, so they eat, then poop. Poop=smell." ]	[ "Robots and machines are really really expensive to build, develop, and maintain. People in Bangladesh are dirt cheap labor that can accomplish the same thing at small fraction of the cost of said robots and machines. Clothes being an easy item to construct, a cheap item, and a safe item, it doesn't make a lot of s...
Why can some products like milk, be storaged at room temperature but must immediately be kept in a refrigerator if they are opened for an instant?	[ "Milk is pasteurized, meaning that when it's sealed it's heated to kill off bacteria in the milk, the source of milk spoilage. The process isn't 100% effective, which is why even sealed milk will spoil given time. However, the low levels of bacteria mean that it takes a while for them to grow enough to create visib...	[ "The concept is called \"Trade Dress.\" If you have a distinctive, non-functional, visual presentation that customers can associate with your product, you can apply for a trademark for it. For instance, I can't sell soda in bottles with the the Coke bottle's distinct shape. Only Apple can sell computers in a store ...
What is the purpose of a Lion’s mane	[ "A male lion's primary role in the pride is to protect the pride from lions not within the pride, and from any animal that threatens the pride. The mane helps to protect the throat and shoulders from attacks from rivals and the like. They only have it there so as to not overheat. They have also found that it has a...	[ "This is like asking \"why does a fire burn itself out - what's the point of using up all the fuel if it can't sustain itself?\"." ]
How do whales jump out of the water?	[ "They dive deep into the water, turn around to face the sky, and use their tails to swim upwards really fast, momentum carries them out of the surface of the water." ]	[ "If you are really interested in this, [watch this.](_URL_0_) It's a one hour lecture by Dr. Hans Mark, who was at NASA during the 70's and lead some of the deep space missions. The short answer is that they rely on gravitational boosts from other planets (usually Jupiter) and the sun. The orbital trajectories are ...
How does RAM created in minecraft work? Also is it possible to use these for the servers itself?	[ "Red stone torches turn off if another Redstone torche's signal is directed into it. If two Redstone torches are fed into each other as a loop one will dominate the other and stay one, but if a signal is sent to the off torch it will turn on and the other will turn off. You now have a 2 bit Redstone ram. No it can'...	[ "Your question is super interesting but science cannot yet explain consciousness, and it seems like \"knowledge\" refers to a conscious awareness of some fact or state of affairs, so your question is primarily addressed by philosophy (and is often called the mind-body problem). Assuming that there's nothing like a ...
Why do homegrown tomatoes taste better?	[ "Most tomatoes in the supermarket are bred to have a lot of water. Tomatoes sell by the pound, not by the quality, so the more water the growers can get into a tomato, the more they can charge for the tomato. The high quantity of water comes at the expense of flavour." ]	[ "Are you watching blu ray? Is it a good transfer? (Example: despite being made in the early 80's Blade Runner Ultimate Director's cut blu-ray is one of the best you can buy) How good is your blu ray player? Is it a ps3? All of these factors contribute to what you determine as a home viewing experience being inferio...
Native Americans and metal	[ "More can always be said, but [Native American societies did use metal before European contact.](_URL_0_)" ]	[ "Do you mean using coins as adornment, as though they were beads? Such as this [Amerindian Dress](_URL_0_)?" ]
What would happen if you got stuck in between two event horizons, like in the cross section of a Venn diagram?	[ "It is not possible for event horizons to intersect in that way. When two black holes approach one another, they perturb each other's event horizon, then merge, forming one joint event horizon. [Here](_URL_0_)'s a paper detailing how that merger happens. Of particular interest is figure 14." ]	[ "This video created by Vsauce 3 (Jake Roper) does a very good job explaining this: _URL_1_ I hope this answers your question. He also did another video on a simmilar line of - could you survive: _URL_0_" ]
Answer me one thing about beta radiation	[ "It's not an actual electron coming from the shell of the atom - it's a neutron that decays into a proton, an electron, and an antineutrino. This is where the proton comes from." ]	[ "Depends on what level the study is at. Look at people who regularly eat lots of red meat and bacon, and compare it to people who don't If there is a difference in cancer rates between the two groups, something is causing a higher rate of cancer. Maybe work place exposure, food, lifestyle etc. Then take genetically...
How did the Ancient Greeks number or name their years? Eg. What 'greek year' did Alexander conquer Persia	[ "This is a question that's come up a few times. Not to discourage further discussion here, but you might be able to find the answers youre looking for in FAQ threads [here](_URL_1_) and [here](_URL_0_)." ]	[ "[This was asked before](_URL_0_) [Heres a formal academic article that really tackles the question.](_URL_1_) Short answer: they very likely didn’t. They viewed the Liver as an organ that was connected to wisdom or the soul (or both). They likely viewed his liver being gored at everyday and yet regrowing as symbol...
Why can't Canadians watch certain American programs (like Saturday Night Live) online?	[ "Because every country has different people who own the broadcast rights of each show and the streaming service that you are trying to use does not have those rights in Canada." ]	[ "They did a few years back. It was called Olestra, and it was supposed to change the way we eat (or so they claimed). Basically, the stuff was a fat-substitute that the body simply wasn't able to absorb or digest, so it was just passed through the body. Unfortunately, a problem arose with the stuff because you were...
Why do telemarketers say things like "I think you'll agree", "You'll have to agree", "I'm sure you agree", "Obviously"? It's so grating, but it must be a concerted tactic - why?	[ "Because it is \"tricking\" your mind to say \"yes\". They make a bunch of positive statements, ask if you agree. You nod along saying, yes, yes, yes. Then they ask if they can sign you up and you say \"yes\"." ]	[ "Both! Laughter is the second language of the human species (the first being crying). It emerged from play-fighting in our ancestral primates. It means, \"this is an opportunity for learning, there is no danger.\" This kind of laugh is called a Duchenne laugh. However, there is a different kind of laughter - non-Du...
Why do humans enjoy watching other humans have sex?	[ "Don't quote me on this but I remember in psy classs that our neurons fire when we look at or imagine something. Similar to when a guy sees another guy get kicked in the balls. They can \"feel\" his pain because the mind simulates it. I am thinking a similar thing happens in our mind when we watch sex. Our brain fi...	[ "Some have suggested that it causes dopamine responses. Similar brain mechanics to forms of addiction (alcoholism, smoking, drug abuse etc). _URL_0_" ]
When we experience that tip of your tongue feeling, how do we know we know the answer when we cant name it?	[ "When we remember things we don't recall the original experience, rather we remember the last time we remembered it. This can mean that sometimes we remember the experience of remembering without getting to the actual data required. It also means that our memories of things drift out of shape with time, like a phot...	[ "Your brain has several types of memory, with varying degrees of longevity. This includes sensory memory, working memory, and longer term memory. Our brains don't record long term memories exactly. Rather, they store enough information that the specific situation can be reconstructed later, albeit imperfectly. My b...
Why do most highway on/off ramps have ponds or small bodies of water next to them?	[ "Construction of roads and bridges creates a lot of rainwater runoff. (a lot of ground is covered in pavement, and the natural flow of drainage is disrupted) There must be a way to mitigate the collected rainwater's effect, and a retention pond serves to collect it and allow it to be more gently dispersed." ]	[ "Governments give tax breaks and subsidies to corporations to lure them in to their area. The idea is that bringing that business to the area will, ultimately, bring more business and jobs to the area which, theoretically, will bring jobs to the locals and more tax revenue for the government. Again, theoretically, ...
I'm a German fighter pilot in WW2. How deadly was it for me to attack an Allied bomber formation that had no fighter escort?	[ "My granddad flew Lancaster Bombers for the Australian Airforce in WW2. He said they flew at night without lights to their destination and had a high success rate in comparison to many other countries/bombers who wouldn't take that chance and so were spotted more often and missions busted etc. He said the hardest p...	[ "Autopilots are based on a [negative feedback loop](_URL_0_). A motor moves a control surface, until that control surface has the desired effect. When the control surface has had the desired effect, it is not moved any further. As for what is the \"desired effect\", the most common scenario is to use a flight direc...

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