Subset (10)

eli5 · 25k rows

Split (1)

train · 25k rows

query stringlengths 20 300	positive listlengths 1 1	negative listlengths 1 1
Why do the hand rails on escalators not go at the same speed of the escalator itself?	[ "Wait really? I've never been on an escalator that does this, it always goes at the same speed. Some field service installers are messing up the escalators you are on." ]	[ "Put a slinky in a long glass tube and fix one end of the slinky to one end of the tube. Now lay the tube on your desk. The slinky is all curled up . Next, stand the tube upright. One end of the slinky is fixed to the top of the tube and the bottom of the slinky dangles down. What if you held the tube at an angle.....
Why are gay men more susceptible to HIV?	[ "HIV has a much better chance of transmitting through anal sex than through vaginal sex. Additionally, while people are more aware of the risks now, lack of condom usage was also a factor back during the big HIV boom." ]	[ "One theory is that the head of the penis evolved it's shape to \"scoop\" out sperm. That way while attempting to procreate we remove the sperm of our competitors while depositing our own. Following ejaculation we become sensitive to stop us from continuing to thrust and scooping our own sperm out." ]
(Physics) What are subatomic particles made out of? Is there a definite "bottom level" particle?	[ "Protons (as well as all hadronic matter) are made up of quarks. There are six known quarks that come in pairs of two, so three \"generations\". On top of this there are the antiquarks as well, you can take a look at all the fundamental particles we know about [here](_URL_0_), it's called the Standard Model. (exc...	[ "If you know the full Hamiltonian for your system and the initial state, you in principle know how the system will evolve for all time. The time evolution is governed by the [time-dependent Schrodinger equation](_URL_0_). However you don't necessarily know what the results of measurements will be. For example, if y...
To what extent were Eastern Bloc countries Soviet puppet states?	[ "The situations varied for each country, especially with regard to who considered themselves \"liberated\" from Nazis or the Nazis \"liberators\" (the most rabidly anti-Communist countries today, like the Baltic states, definitely were Nazi-friendly). Generally, in order of descending preference, the Soviet postwar...	[ "Hi, I've approved the post, but just a note to you and potential respondents: this subreddit has a 20-year rule against discussing current events, so any answers will have to cut off at 1997. If you're looking for answers that can include 1998-2012, do consider x-posting elsewhere, eg. a foreign affairs sub like /...
What are the advantages of Field Programmable Gate Arrays(FPGA), how do they differ from Application Specific Integrated Circuits(ASIC) in computers? Why have they gotten so popular recently?	[ "An FPGA is a type of ASIC. It is basically a lot of lookup tables (LUTs), and wiring (with registers and clocks to form your state machines). From a user's broad brush point of view, you program a CPU using a computer language (like C or Java), while you program an FPGA using a hardware description language (like ...	[ "Yer not alone in askin', and kind strangers have explained: 1. [Eli5: does it even matter if the food we eat is \"organic\"? ](_URL_5_) 1. [ELI5: What is the difference between organic and non organic food? Is it worth the price difference? ](_URL_1_) 1. [ELI5: Why is \"Organic\" food more expensive at the grocery...
Do we lose metal forever when it rusts?	[ "Most rusting is from the pure metal becoming oxidized, meaning oxygen from the atmosphere attaches to it and changes it's chemical properties. Rust can be melted back into metal easily enough, though if a piece of metal rusts into a powder, collecting it all back becomes a challenge. When melting it back, you'll h...	[ "Not any time soon. For example, in 1787, Mozart created a game when you rolled dice to randomly select measures you could put together to build a waltz. Turns out there are over 700 trillion combinations, meaning every man, woman, and child in the world could each have 100 million unique waltzes \"composed\" by Mo...
Is there a way to manipulate Dopamine levels in the brain?	[ "Cocaine is an excellent dopamine reuptake inhibitor. Try smoking a little crack each time you eat broccoli. Eventually your mind will associate broccoli with the cocaine high and you'll get an associated \"high\" from the smell/taste of broccoli, much the way drug addicts get a flood of reward chemicals just going...	[ "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." ]
What is hawking and why is it illegal in Hong Kong?	[ "Unlicensed street vendors. It's technically illegal everywhere, but in Hong Kong it's especially difficult to get a license (officially because food safety, unofficially because it's essentially a black market for food), and thus it is more prevalent." ]	[ "In the UK, we had a [knocker-up](_URL_0_) , who was a guy with a big stick and would tap on your bedroom window when it was time to get up. No idea who woke him up though." ]
This calculation technique. (video in description)	[ "Its just a mental application of the abacus. The abacus is a mechanical calculator used for basic computations using a sequence of beads on rods arranged in order. What the kids are doing is mentally imagining the abacus to solve the problems. There are loads of videos on youtube explaining the different concepts ...	[ "Warning: anecdotal evidence ahead. I'd consider myself mathematically minded (studied Math and CS in college, currently working as a software engineer), and this is definitely true for me. I'm pretty terrible at remembering (and sometimes even understanding) song lyrics, but I'll often be in a bar or other noisy e...
In 1903, Joseph Chamberlain said "The United States, with all their vast territory, are filling up; and even now we hear of tens of thousands of emigrants leaving the United States in order to take up the fresh and rich lands of our colony in Canada." What is he referring to?	[ "He's likely referring to Americans who emigrated to Canada's western frontier in the early 20th century. - Yes this emigration of US citizens to Canada was real, particularly in the provinces of Alberta and Saskatchewan. [About 20% of Canada's immigrants at that time were from the US](_URL_0_). That number is muc...	[ "[Ptolemy's map](_URL_1_) was one of the first maps of the world. Ptolemy's Geography (written 1st century AD) was a description of the world at the time; this was a text, not a map. There were attempts to translate Ptolemy's Geography into a map in the 15th century, and the result is the image above. There was a s...
Who is "Jean Francois" in the shanty "Boney Was a Warrior"?	[ "Jean François likely came from the French shanty Jean François de Nantes, which had a similar tune. There are similarities in the lyrics of the two songs: the French song has oué, oué, oué instead of away ah-yah, and at least one version of Jean François de Nantes uses the word terrien-landlubber-which m...	[ "I have taken an interest in the Pacific Campaign and the history of naval aviation and am now looking for recommended reading. On my shortlist so far: Title \| Authors ---\|--- Pacific Crucible and sequels \| Ian W. Toll Shattered Sword: The Untold Story of the Battle of Midway\| Jonathan Parshall & Anthony Tully ...
What are those indents on glass liquor bottles for?	[ "I suspect that they're used to help the machine align the bottle when it gets the label pasted on, because most bottles also have some decorative embossing that needs to line up with the label." ]	[ "Those lines are the defrost functionality for the rear window. Basically if you turn on that functionality they heat up, which defrosts your back window." ]
Does the aphelion of the Earth orbit the sun?	[ "Yes, mostly due to the influence of Jupiter. The aphelion rotates relative to the seasons over about 21000 years." ]	[ "These figures are estimates, so we don’t really know. Also, it’s hard to judge where alpha Centauri’s Oort Cloud finishes so it’s hard to know. If this is true, however, it could be very very close to each other." ]
How the hell is the U.S. still allied with Saudi Arabia? And selling them F-35 Joint Strike Fighters regularly?	[ "Go look up Saudi Arabia's #1 export. Relatedly, the alliance is also based on the Saudi influence over political affairs in the region, so that their friendship is valuable. Further, they are a stabilizing factor, at least short term, so the collapse of the regime could be dangerous." ]	[ "If your next door neighbor is trampling flowers in your backyard, and your much larger, much bigger neighbor from across the street decides to try and stop him, it's in your interest to just let him do that, whether with implicit or explicit approval. ... especially when you can't get to that corner of the backyar...
How are "Murder" and "Attempted Murder" different sentences? Do people get off easier just for being bad at it?	[ "They've done less damage, even if it was only by incompetence. The person they tried to kill is still alive, they can still interact with their family members, contribute to society, etc. Criminal punishment is often based on two major factors: intent, which is what you're talking about, and total damage caused." ...	[ "There are the practical reasons, of course. Lots of arrangements to be made afterward, transfer of the body, funerals, tons of legal paperwork to get signed and notarized, and having backups in place in case the hanging doesn't go as planned. It also can't upset the normal flow of work for the day, so we want to g...
Why do we need standoffs on our motherboards?	[ "If you screw the motherboard directly to the case without using the stands then the exposed metal circuitry on the back of your motherboard would be directly touching the case, which is usually also made of metal, thus causing a short-circuit." ]	[ "You may want to do a search or look in your textbook for the term body diode. This is a \"parasitic\" diode that forms from the structure of a MOSFET, and keeps the MOSFET from being a totally symmetric device like it is in theory." ]
Why do I produce so much mucus when I run in cold weather, even though I don't have allergies or a cold?	[ "\"During cold weather, the cilia, which normally sweep mucus away from the nostrils and toward the back of the throat (see respiratory epithelium), become sluggish or completely cease functioning. This results in mucus running down the nose and dripping (a runny nose). Mucus also thickens in cold weather; when an ...	[ "It is supposed to be a natural reaction that our ancestors used to survive. It would keep them away from the nests of dangerous insects such as termites. It was the body's way of trying to avoid the danger and keep alive. If you believe in evolution you could say that it is part of evolution." ]
what does "feeling vulnerable" mean?	[ "I would say it’s the feeling that someone could easily hurt, attack or betray you. Wether that’s displaying emotion, asking for compassion or forgiveness. It puts you in a very open and unprotected state." ]	[ "Imagine a water pipe. If you're the only person using it you get full pressure. The more connections to that pipe the weaker the pressure." ]
What happens to food when it gets deep fried? How does it become ‘unhealthier’?	[ "When deep frying, some of the frying oil will leech into the food being cooked, increasing its fat content. Additionally, most things that are deep fried are often breaded and battered first to protect the food item being cooked from absorbing a bunch of oil, and for extra flavor and texture. These coatings are fi...	[ "The more money that is in circulation the lower the value of each denomination of that money. So a dollar today may get you a candy bar, but after the government prints a whole bunch of money that same candy bar may cost you three dollars." ]
How can the angles of a triangle add up to 180°, a square to 360°, a pentagon to 540°, etc as the number of sides approaches infinity, and yet a circle contains only 360°?	[ "You're looking at different angles. The angle you're looking at is the total sum of the [interior angles of the polygon](_URL_0_). When you're thinking of the circle, you're looking at the [Central Angle](_URL_1_). There are 360 total degrees of central angles in any polygon, but measuring the interior angles is c...	[ "Let's say you're a game developer, and you wanted to give out codes for people to get into the beta of your game. You decide to do this by giving access to one person to start, and then every Friday everyone in the program can invite 4 friends. So on the initial day, you only have 1 person playing. But after the 1...
Do animals have the capability to remember or even understand that they were rescued from terrible conditions in the immediate and distant future?	[ "Most animals dont remember anything very well, but they get habits ingrained in them. For example, i have a rescue cat who still eats every meal like its her last and that she has to scrape up every last bit (even though shes absolutely fed enough). so in that sense they \"remember\" So with all that in mind, I do...	[ "A few things to realize before trying to draw conclusions like this: * Science is an evolving process that doesn't end with a single study. One study's results could be refined or contradicted by other studies, and it takes multiple iterations to suss out the truth. * Science journalism is terrible. University PR ...
Can you leave solar system going up or down instead of horizontal?	[ "You could, but you wouldn't be able to take advantage of all the [gravity assists](_URL_0_) that spacecraft headed out of the solar system (like the Voyager and Pioneer crafts) usually take advantage of. It's much slower, since you don't have any velocity in that direction to start with." ]	[ "This won't be the most in-depth answer but it's kinda like this Plants and tree love sunlight. They use it in photosynthesis to create this neat stuff called glucose, which is pretty much sugar. Allows them to grow n stuff. So the higher they get the more likely they are to get sunlight, which causes this thing c...
If modern humans have been around for hundreds of thousands of years, why have we only discovered tools/tech/civilization as we know it relatively recently in that scope of time?	[ "Technology builds on top of itself. Think about how much we can do now that we have computers that would have been simply impossible to do prior, no matter how smart we were. Really, though, it seems that the big leap forward occurred when we invented the written word (although there could be some confirmation bia...	[ "Physically developing we are close to a bobcat or other animals in terms of lifespan. We have a much, much more complex world than any other animal does though. We have to eat that play-doh and stick that key in the electric socket to learn that we want to be a philosophy major or an architect. Bobcats can't build...
Why didn't the Europeans enslave the Native Americans like the natives in Africa?	[ "They were enslaved. Then, in the early 1700s, the Indian Wars caused a lot of problems for slavers, who were regularly raided by Native Americans during the wars. Gradually, most Native American tribes joined up with one of the big tribes for protection (Creek, Cherokee, etc). So it's mostly a matter of Native ...	[ "A woman named Frances Wright did something like what you are asking in 1824. In Memphis, TN she bought two thousand acres of land from Andrew Jackson and would buy slaves. On this land she set up a co-operative labor system where they could basically work off their price of purchase and then they would be set free...
Long pipe air pressure speed question.	[ "It would travel at the speed of sound in air, about 350 m/s." ]	[ "A combination of lowering your body temperature (to slow down bodily functions, which in turn use less oxygen), a low resting heart-rate that circulates more oxygen per pump, and practice." ]
What does it mean when someone has to 're-learn how to walk'?	[ "My wife had a stroke 5 weeks after our son was born. The left side of her body was completely out of commission. It took almost two weeks for her to wiggle her toes again. Another three to be able to stand and put maybe 5% body weight onto her leg. The neural pathways her brain used to send signals got nuked. She ...	[ "They would rather a site newbie not have to search to find the \"sign up\" page but rather a returning, and more experienced site user navigate to find the login page." ]
If we are 99.9% empty space, along with everything else - Why can't we see through each other and see through walls?	[ "The oft quoted \"empty space\" idea is describing the space in between the electron shells and the nucleus, which is inside the atom. However, if you get light with a short enough wave length then we can see through things. That's how x-rays work!" ]	[ "Simply put for the same reason drinking water when you're not thirsty isn't as refreshing as when you're REALLY thirsty. Anticipating the bodies' needs doesn't trigger the same reward responses in the brain as fulfilling a need that is already present. Your muscles don't NEED to stretch right now, so you can't ant...
Why do women stay with the men who beat them?	[ "It's not like anyone walks into a relationship where they get beaten on the first debate. Physical abuse comes out after a gradual descent into shit. There's usually a bunch of emotional/psychological abuse leading up to it that slowly erodes their self-worth until they think they're responsible for or deserving o...	[ "Its the easiest way to get out of the kitchen for a 5 minute break." ]
- Why has the cost of college tuition risen so exponentially since my grandparent's time (in relation to the value of the dollar)?	[ "WW2-era the GI bill was created to give jobs to veterans. Loans were later extended to low-income students as part of Johnson's Great Society program. Vietnam war led to an increase in college enrollment as a way to avoid being drafted, and to prevent a post-war crunch the bar for getting a loan was raised. Today ...	[ "For any one of them, really: How good is your memory? Or, how efficient would you say you are at storing scientific fact without constant review of the subject? I often feel like I am having to constantly review everything and I've always wondered this about top scientists." ]
How does nuclear binding energy work and what are it's uses?	[ "You can read an introduction to nuclear binding energy [here](_URL_0_). It's uses are understanding how much energy is gained or lost during nuclear reactions and radioactive decay, which can help with things like nuclear power and medical physics." ]	[ "This was actually considered by US government researchers, in work that was classified for a very long time: _URL_0_ Mainly, neptunium is not used because purifying it considered too expensive: _URL_1_" ]
How does a dark room (for developing photographs) work.	[ "In the dark room there is an enlarger. A negative is put into it. A bright light is shone through the negative onto light sensitive paper. The image is kept in focus. After the light sensitive paper is exposed to the image it is put through a series of trays of chemicals which develop the image and then the develo...	[ "Good question. What you find with pair production is that it can only occur in the presence of an electric field. The reaction you described is called \"pair production in the nuclear field\" and it takes place in the vicinity of an atomic nucleus. So the pair production photon interacts with a virtual photon in...
What do we know about pubs / drinking establishments in the Roman Empire?	[ "Generally, wealthier Romans drank their wine at banquets, called conviviums. At these banquets, each drinker would get their own wines, depending on their social class. These were largely social occasions, where politics would be hashed out. Unfortunately, I can't find any more information, and I'm not sure if the...	[ "\"So perish every one that shall hereafter leap over my wall\" ( Romulus ) _URL_0_ Once you cross the pomerium ( without any authorization ) you become an ennemy of the city and by killing his brother, Romulus acted as its guardian. Civic duties are more important than blood ties , importance of the law. W...
In a game as beautiful and detailed as GTA V, why the hell do the vehicle mirrors not work?	[ "Mirrors are super hard on either the lighting or npc count depending on the method the game designers decide to use...there are 2 shit tons of cars in that game so there are 4 shit tons of mirrors to keep track of, that's a little too much for a simple aesthetic. To incorporate that they'd have to remove a lot." ]	[ "Depends on the way the online stuff is done. It's either server side calculations, where you pressing the button sends a message to the server along the lines of \"hey he pressed shoot, tell me what happened please\" or client side which is \"hey he pressed a button so I figure the bullet went here and hit that gu...
Why do insulin injections create an area of "hard skin" and is it happening with other forms of injections too?	[ "Hardening under the injection site is caused by overdevelopment of fat and some scar tissue. The medical term is [lipohypertrophy](_URL_0_). This is due more to the medication than to technique. Insulin encourages the development of fatty tissue, and massage does not appear to help. What does help is to rotate in...	[ "First you must consider the caliber of the weapon. Second, the type of bullet (JHP, FMJ, etc.). Then the size of the target. Small caliber handgun plus large target means that many of the bullets can go through soft tissue and either end there or ricochet inside but with less kinetic energy. It's not as easy as th...
Why do train tracks have rocks over them?	[ "It is called ballast but it is not used so much to weigh down the tracks, the tracks themselves and trains do a good job of that themselves. However it is used to prevent the tracks from moving too much when trains go over them and by changing weather. When the sun shines on the train tracks the iron will expand m...	[ "Simple: Their music doesn't act as a confession. Music is a performance, you wouldn't arrest an actor for being a murderer just because they play one in a movie would you? Similarly you wouldn't arrest Eric Clapton for admitting he shot the sheriff, and you can't arrest a rapper for saying they are \"ridin' dirty\...
Is there any organism or animal where the male does not have to attract a mate, and the females fight over the male?	[ "This occurs in sex-role reversed species, and is typically accompanied by a polyandrous mating system. Both sex-role reversal and polyandry are pretty uncommon. The northern jacana is a famous example of this. The females are more brightly colored than the males, and they defend territories that contain several ne...	[ "One theory is testosterone. It is an anabolic steroid, meaning it builds muscle. So the good part is men have more muscle and other secondary characteristics but there is a bad part, steroids are bad for the immune system.That's why when you have an inflamation you can use steroid creams., now that cream will not...
How payments in USD to GBP work.	[ "You can look at the current inflation rates, if one rate is much higher than the other your choice is pretty simple, for instance if you were going to school in Zimbabwe I'd say wait until the last minute to pay your tuition. But there's not much difference between the US and UK inflation rates, the US's is slight...	[ "Remember the old adage ? One mans terrorist is another mans freedom fighter ? They wire the funds to a bank in a friendly country." ]
What exactly is "pure energy" as is often used in fiction/movies/comics/etc?	[ "There is no real world equivalent. It's a made up concept that sounds exotic and powerful when they describe it in the movies, but doesn't actually mean anything. The portal machine in Avengers acts as a type of wormhole between dimensions, but even the wormhole is just a theoretical concept that falls out of phys...	[ "After reading some articles and some wiki pages- there were two groups of bad people that wanted to help aliens colonize earth. They were going to do this by creating an Alien Human hybrid using the black oil. One of those two groups, however, were really good people pretending to be bad so they could try to stop ...
What is an actuator?	[ "An actuator is a device that converts some kind of energy into motion. That energy may be electricity, hydraulic power, or pneumatic pressure. The motion may be anything from moving some wheels, to raising an arm, to closing a valve." ]	[ "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." ]
Why have anti-trust laws not applied to the 6 largest media corporations that possess 90% of the market share.	[ "In TV and radio, the government basically created an oligopoly on purpose by taking ownership of spectrum and assigning it to a few owners. Government policy has oscillated between thinking competition is bad (and therefore it should create cartels) and competition is good (and therefore it should try to kill big ...	[ "ISPs have local monopolies. They're often the only service provider in the area. Google is attempting to change this by pushing Google Fiber." ]
Professional cosplayers	[ "People get paid to cosplay. Professionally. They usually earn money from the cons they attend, as their presence there will boost attendance. Sometimes they get paid by advertisers to promote a game/movie/show, where essentially act as models. Kind of the same way a girl in a bikini advertises a car. Unsurprisingl...	[ "Add-on question: how hard would it have been for them to have sculpted body-hair, assuming that's not the answer?" ]
How can something (such as an electronic device) be waterproof for only a certain length of time?	[ "the phone will not \"simply leak\" at 30 minutes. that is simply as long as they have tested/will certify the water resistant nature of the device. it might be water resistant for 5 hours or 5 years. but they only certify it to be good to IPX7 rating which is that deep that long. nothing happens after 30 minutes ...	[ "Some quick Googling turned this up. _URL_0_ The tl;dr is that you print a wedge of ink that changes color in response to temperature changes over a wedge that conducts electricity. Pressing each end completes the circuit, and how far the indicator changes is dependent on the current density. Higher current densit...
Did monks and priests really drink nothing but beer in the middle ages?	[ "Most people did. Water wasn't considered safe to drink, and was often contaminated with human waste." ]	[ "Also, an add-on to this, were there ever periods of time where eating medium rare pork/chicken were acceptable, or has it always historically been beef that was eaten medium rare?" ]
Do human skeletons retain their death pose?	[ "Rigor mortis would likely change the position, and as tendons dry up they would pull the skeletal structure into different positions; you've almost certainly seen this in fossil imprints where a creature's head is bent backwards. Consider [this](_URL_0_) image." ]	[ "Norwegian here. Usually you just dig through the frozen ground as I understand it. It's harder, but possible. Sometimes the ground is thawed/defrosted for burial using a heating \"lid\" Norwegian news link about thawing _URL_0_ Also, frost moves things. Sometimes leading to skulls and bones being pushed up throug...
Why are bronze artifacts never polished	[ "Bronze, copper, brass and related alloys are highly reactive to oxygen. This is called oxidation. Oxidation causes copper in these alloys to become weak and crumble. If an object completely patinas over its entire surface evenly, then the core of the object is no longer exposed to oxygen and cannot oxidize further...	[ "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." ]
Why does cold weather cause plants to lose their leaves/die? Do plants have metabolisms that are slowed down in the cold?	[ "It's usually not the cold weather, it's the lack of sunlight. In the winter, as the days grow shorter, there is less light for the leaves of the plant to collect and turn into energy. Having the leaves costs the plant energy and if they aren't collecting enough from the sun, then it's not worth it to have them. It...	[ "Commercially frozen meat is often flash frozen, this means that the ice crystals formed are small and don't damage the meat cells very much. If you freeze meat at home it's a much slower process, Large ice crystals form an like little spears puncture the cell walls of the meat. This means that when it defrosts the...
; Why does being shot in the head kill someone instantly?	[ "[This gel is your brain.](_URL_0_) when you got shot in the head it doesnt usually create a nice clean hole. Your brains essentially get slammed around against your skull and is more or less turned into scrambled eggs. when your entire brain is essentially FUBAR you tend to die very quickly." ]	[ "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_" ]
How do people who colorize photos know what color to make things?	[ "Depends on the source photo. For example old photos with advertisement or firetrucks or uniforms, it can be deduced from modern colors what their original color was. Otherwise the colors are just chosen arbitrarily so that they seem realistic and suitable for the given time the photo was taken." ]	[ "It depends. In the US and other 1st-world countries, you can use tax records, asset prices (assets are stocks, real estate, etc.), salary data and other freely-available data to come up with a good guess. Other countries might require some more guesswork, but the principle is the same." ]
Why is the concept of relative humidity used in weather forecasts and reports, instead of the absolute humidity?	[ "The relative humidity is useful because it relates to how well water will evaporate or condense. In high humidity, sweating is less effective, and condensation can fog up glass or allow mold to grow in walls. Very low humidity meanwhile can dry out our lips and nose." ]	[ "As an Australian, RBTs are pretty much a part of our culture. You're right in that theyre not completely accurate but they arent really inaccurate, more like +/- 5% of the true number. However if you blow over your countries legal limit then you will be required to do a second test on a much more accurate machine...
How does the college football bowl system work? What determines which teams get into which bowls??	[ "The various conferences sign deals with different bowl games. Within those deals it gives that bowl a spot in the selection order of a conference's bowl eligible teams. For example, the Chick-fil-a bowl has 2nd choice of eligible ACC teams and 5th choice of eligible SEC teams. _URL_0_" ]	[ "Netflix/hulu/shomi or all other good streaming services have an international database. It analyzes every movie and how many people watched it, and how many people rated it. The importance is more of public rating, rather than views. It also has an algorithm to group movies together for the \"For You\" section. Bo...
How does mouth numbing gel work?	[ "In order to conduct signals, including pain and other sensations, nerve cells need charged ions to be able to move in and out of them using special channels, which creates the electrical currents that transmit the signals. Benzocaine, which is the main ingredient in Orajel, blocks one type of these channels, keepi...	[ "Sensodyne toothpaste. One week and all sensitivity is gone. I've known people that have drank warm beer for a decade then tried that and couldn't believe the change." ]
I've heard that the development of polygamy in regions of Africa and Arabia may have to do with high mortality rates and the effects of the hot climate on fertility. How much credence do these claims have	[ "/u/frogbrooks' excellent [answer on sexuality and gender in Pre-Islamic Arabia](_URL_0_) indicates that the move away from polyandry to polygamy was primarily socially motivated." ]	[ "Hot and humid conditions speed the growth of bacteria and speeds up decay. Cold slows those processes. The same way food doesn't spoil as fast in a refrigerator or freezer." ]
Why are my foreskin and genitals as tan as my arms and legs even though they get no sun exposure?	[ "I thought I was the only one. I'm half black and half white so I always have a golden/ yellow hue to my skin but more of like my actual sack is DARK like probably 4 shades darker than the rest of my skin. Like my skin is the color of a lightly cooked hashbrown but my sack and foreskin are way closer to black okay ...	[ "Imagine a flamethrower and a crowd of X-Men kids. there's a range of powers. Burn the crowd for 20 seconds and they all die. Burn them for 10 seconds, and maybe that thick skinned or overly hydrated kid survives. He wouldn't have survived the assault for 20 seconds, they would all have died. But now he survived. X...
How do cameras take pictures?	[ "[Here are some good answers to this question, posted two weeks ago](_URL_0_)" ]	[ "You have a bunch of satellites in space, sending signals that say, \"My clocks says 5:00:00.123\", \"My clock says 5:00:00.124\", over and over again. Your GPS measures the differences it takes for the signals to reach it. If it receives one second a thousandth of a second sooner, it knows that satellite is about ...
What happened to the mysterious Bermuda triangle. Why is it no longer an issue.	[ "It has pretty much been debunked in the day of GPS guidance, satellite communications and modern ship engineering. The myth often collectively centred around different theories to explain the disappearances such as aliens, magnetic anomalies, mysterious sea creatures and so on and on. The simple truth is disappear...	[ "[Search before submitting, especially when asking about current events. The search box is in the upper righthand corner of the page.](_URL_0_)" ]
Why can you hear people talk across a lake?	[ "Since water is more dense than air and is incompressible, sound waves have a harder time penetrating the water's surface. Also since the water within the lake do not have waves, there is nothing to obstruct the waves in opposing directions." ]	[ "4 Years old post, but it is due to refraction and differences in air density apparently _URL_0_" ]
Why do people change the tone of their voice depending on who their talking to?	[ "In social psychology, they like to talk about schemas. Schemas are like knowledges you have about yourself, people, roles, and social context. If you activate a schema about one person that you know (ex: you know that this person is pissed in the morning), you will act according to this schema (ex: be soft with t...	[ "You can't. It's called confirmation bias, where you pay more attention to those instances that confirm your belief than those that don't. Times when you've thought someone was staring and nobody was are not of interest, so disconfirming evidence is weighted less in your mind. It's a very well understood cognitive ...
Electron Configurations & the Pauli Exclusion Principle - How can an atomic orbital (p,f,d etc) hold more than two electrons if the electron has only two spin modes?	[ "PEP only applies if fermions have all the same quantum numbers. There might be a lot of them for a given specific system. The letters s, p, d, f refer to the orbital angular momentum quantum number. Principal quantum number (read ~energy level), z-component of orbital angular momentum, spin angular momentum, nuc...	[ "The really ELI5 answer. Everything wants to make a single ball of stuff because of gravity. But just like a centrifuge, spinning makes things want to go to the outside. Since they are only spinning in one direction, they only move to the outside in one direction. So you have a ball that is spinning and spitting ou...
If you're trying to drink more water, does it make any difference if you drink it all at once or small amounts more frequently?	[ "You'll feel bloated and full if you drink it all at once. If you're exercising or playing sports it's very important to drink smaller amounts every now and then so you won't feel full." ]	[ "How big are the files you are talking about? You may have noticed that transfer speed always ramps up slowly. Therefore it will always be faster to transfer one 10gb file than a hundred 100mb files. This is because the file system needs to open a data stream of the file, read the data, write the data, close the ...
Is there any difference between eating 10 cookies today and eating 1 cookie every day for the next 10 days?	[ "Yes. Eating a large number of cookies will add many calories into your diet. Your body will be busy processing those calories and using them for energy as they come from fast-energy sources like simple carbs. Other food you eat with fat and protein after eating 10 cookies will be set aside until the cookie carbs a...	[ "Couple things to consider. First, when you get tried in court, prosecutors will try to get you convicted for every crime you committed, not just the biggest one. So you may be on trial for murder, but also assault, battery, kidnapping, brandishing a weapon, etc... You may be found guilty for any number of them, a...
[Engineering] Is it physically and structurally possible to build a large warship like those of Star Wars?	[ "In space, there's no gravity to put strain on structures that would collapse on earth. Assuming you had enough raw materials to build the ship, and the fuel to take the pieces into orbit, the only limiting factor for the size of a vehicle constructed in orbit is when it starts being affected by its own gravity. An...	[ "We won’t know until we learn more about the connection and economics of the situation. We could come up with tons of scenarios, but until stuff is more released we don’t know. Hell we don’t even know if any of the companies attempting to do this type of stuff (it’s more companies than just SpaceX, SpaceX just hits...
Why didn't the USA just let the Confederate states secede during the American Civil War?	[ "Because it sets a precedent. If they just let the Southern States leave, then they can't stop any other states from leaving if their dissatisfied with taxes or anything else. If the US government had just let the south from secede, then the government would have eventually broken apart." ]	[ "Let's say you're starting a business and I loan you the money to get started. You make your payments and manage to keep the lights on. Soon, you start making a profit. I, who loaned you money, don't come demanding more money because you're making the payments on which we agreed. Your buddy Jeff has a business, to...
Is there a reason that we love to drink milk after eating cake as opposed to other drinks?	[ "Milk clears the sugar taste from your mouth and sugar overpowers the milk taste, so they end up complimenting each other because each sip/bite you taste the full flavor of the milk/cake. The same reason that red wine and beef go together." ]	[ "_URL_0_ Reportedly cows tend to feed more around sundown when the nutritional content of plants is higher. > “A series of USDA studies looked at animals’ ability to choose different forages. The researchers cut hay in the morning and in the evening and used this in the choice tests. They’ve done it with cattle, g...
How is it that so many species of creatures on this planet all have so many similar biological features?	[ "If you think about the way that evolution works (natural selection specifically), it ends up with selecting features most suited to the environment. In the case of the features you mentioned, having 2/4 legs is most useful for balance in most land environments, which is why so many large animals have them. The s...	[ "Most people copy ideas. If the tribe A comes up with a good idea, then tribe B next door will copy it. Or tribe A's good idea may make it powerful enough to conquer tribe B and force them to adopt their idea. Isolated communities may not be exposed to outsiders' ideas (like modern technology) so they don't copy th...
What exactly is a fart?	[ "Often gas comes from the microorganisms that live in your gut. Different kinds of gut flora help break down different materials that we eat, thus making them easier for us to digest. These microbes gives of traces of methane and sulfur, among other things, as waste products. So when you have some gas after a meal,...	[ "I could try to explain it to you, but this video is all you really need: _URL_9_" ]
How does a liposuction work without ripping your guts out?	[ "The type of fat that people are trying to remove by liposuction is the visible fat that lies between the skin and the muscle. Lipo literally vacuums the fat from under the skin and never actually penetrates into the abdominal cavity." ]	[ "Their claim hasn't been verified in any scientific way. If I gave 10000 people a sugar pill and 1000 of them lost weight I could legally claim that the pill helps with weight loss. It wouldn't make the claim true, and the results might not be repeated in a larger sample population. The disclaimer would keep people...
Why couldn't the Allies have used atomic bombs as a nonlethal show of force, rather than actually dropping them on cities?	[ "The formal target committee decided the A-bomb had to kill. One bomb, from one plane, would wipe a city off the map. It would be horrible. But they wanted it to be horrible, to end the war and to try to stop the future use of nuclear bombs. _URL_0_" ]	[ "A couple reasons. In the United States, the burden of proof is on the prosecutor to show that the defendant committed the crime. This \"presumption of innocence\" makes preparing a case hard work, because to win, the prosecutor has to convince 12 regular people that, with absolutely no doubt, the defendant commit...
'A' historian or 'AN' historian?	[ "I've heard that it is a linguistic difference. \"An\" historian is preferred in Britain, and \"a\" historian is preferred in the States. All that really matters is that you use one or the other consistently." ]	[ "If it starts with a vowel sound, you use an. While RPG doesn't have a vowel as the first letter, it is a vowel sound (ar-pee-jee). An example of the opposite is USB. Its pronounced with a consonant at the start (yoo-ess-bee), so its a USB, not an USB." ]
How does a scientist look at the skeleton of a dinosaur and definitively say "that ate meat"?	[ "You can look at the type of teeth they had and extrapolate what they are. If they have flat teeth they ate plants (cows, deer). If they have pointy, sharp teeth, they ate meat (dogs, sharks). If they have booth, they are omnivores (humans)" ]	[ "Several reasons: * Better technology. Many chambers were detected by sonar or radar. They would send a signal through the stones and listen for irregular echoes. Today's sonar and radar imaging techniques are better than they were in the past. The equipment is more sensitive, uses different frequencies, and with d...
Where did antisemitism start and why?	[ "This is an extremely broad question that has no one answer. It's like asking when racism began as a concept, but we then must address the historiography of racism and what racism meant to different cultures in different time periods. Modern anti-semitism typically emphasizes the ethnic cleansing of all Jews in a...	[ "This is a pretty common question here; here's some links from the FAQ: _URL_2_ _URL_4_ and a few others that have been posted over the years: _URL_3_ _URL_1_ _URL_0_ Most posts agree that it is largely a post-war pop phenomenon with fairly little evidence to support it." ]
Why does my urine have a weird odor after eating asparagus?	[ "Don't have an answer but had to throw in a side note. Asparagus used to be included in emergency kits for pilots because within 15 to 30 minutes after eating it, you can urinate in the water and attract fish. _URL_0_" ]	[ "It's called the oligodynamic effect. Here you can read about it, but usually it's pretty easy to google these types of questions: _URL_0_ Apparently several heavy metals do it including copper (Brass is an alloy of copper) and silver. Basically heavy metal ions bond with bits of proteins in bacteria and make them ...
How big and fast does a meteor have to be going to go through the earth?	[ "through the center? You can't, at least not cleanly, anything of such force required would pretty much shatter the planet." ]	[ "only if it's structure is perfectly non-[amorphous](_URL_0_) so that it wouldn't start contorting with the inertial effect commonly known as the [centrifugal force](_URL_1_). This would rule out glass and many plastics Also it would have to also be in a perfect vacuum so that air resistance, or friction with the a...
How are rockets filled with fuel?	[ "Solid rockets are typically assembled around the fuel. The Space Shuttle boosters were made by casting large blocks of fuel and sliding them inside a booster casing. Most orbital rockets are liquid-fueled, because the liquid-fueled design separates the engineering challenges of controlling the combustion, from tho...	[ "I had the same question, but I hit the google and got this. > NASA programs previously used pencils[6] (for example a 1965 order of mechanical pencils[7]) but because of the substantial dangers that broken pencil tips and graphite dust pose to electronics in zero gravity, the flammable nature of wood present in p...
Why is it _URL_0_ and not _URL_1_	[ "it is just how they decided to organize it. Generally DNS lookup work from the end to the front, so the first thing they would notice is that it's a .org TLD (top level domain) and then go to the wikipedia. The en and m are implemented by wikipedia, so it is up to them on how they want to organize it from there." ...	[ "Because those characters have meaning in the file path: the string used to identify the location of the file. For instance, the file \"data\" in the folder \"2012\" and the file \"2012/data\" would both have file path \"/2012/data\"." ]
If you decompress a Shuttle/Cargo bay on a spaceship, will that push the space craft, or will the air just get sucked out into space and have no effect?	[ "If there are no external forces then momentum is conserved. The air going in one direction means the spaceship must go in the other." ]	[ "I mean, you can work out and gain mass, but the statement about muscle is taking into account that you follow the same routine as in earth and were stabilized on not gainong/losing muscle. What it means is that since you don't make work against gravity to walk, move things, etc. Doing the same workout with the sa...
Why do we call damage from both heat and acid "Burns"?	[ "Burn is almost a generic term for any non-piercing damage to skin. On top of thermal and acid burns, there are also other chemical, electrical, radiation, and friction burns. Treatment of different types of burns is also pretty similar, lending value to an overarching term." ]	[ "We have sent landers to Venus in the past, the problem is that Venus is a hellhole. The Soviets landed a few probes in the 60s and 70s in order to study the atmosphere and get temperature and pressure readings. On of these probes, Venera 7, was actually the first spacecraft to land on another planet and return da...
Why is the speed of light a whole number?	[ "The meter is defined such that light speed is exactly that many meters per second. It was changed that way in 1983. An earlier measurement [from 1972](_URL_0_) puts it at 299792462 +/- 18 m/s." ]	[ "The equation E = mc^(2) is true in any unit system. I could measure E in ergs and m in stones if I really wanted to. The equation would still be true. The formula is also not arbitrary at all. It's derivable from relativity." ]
What is the rate at which photons hit things various distances from the sun? (Questions specified in post)	[ "It is very approximately (the intensity of the sun at Earth, 1.3 kilowatts per square meter) x {(Earth's distance from the sun, 150 million km)/(distance you're interested in)}^2 / (peak energy of the sun's spectrum, 2.5 electron volts). At Earth this is roughly 10^21 photons per square meter per second." ]	[ "This illustrates the difference between this subreddit and r/answers. This kind of requests doesn't belong here. r/explainlikeimfive serves the purpose of explaining hard things in easier ways. r/answers works for trivial and curious questions like this one." ]
why does not drinking enough water cause headaches?	[ "Dehydration causes your brain to shrink. As your braincase is essentially sealed, this shrinkage causes negative pressure between your brain and skull, which has the effect of pulling on the inside of your skull - like being squeezed, but from the inside. This is what causes the pain." ]	[ "The blood is being redirected into the muscles, leaving less for the head. Additionally, using lots of blood oxygen up at once will require the bloodstream to recover said oxygen. Someone smarter, please correct me, I'm likely wrong." ]
Would the answer to things like the Fermi Paradox not be celestial events such as SGR 1806-20 erupting?	[ "Well, partially, but it's like saying \"Do we expect to see life forms on Earth?\" - Some get killed by volcanoes - Some get killed by floods - Some get killed by droughts Etc etc \\- But some organisms survive these events, reproduce, spread, etc. The usual framework for discussing these things is the Drake Equat...	[ "Hi! Just wanted to let you know that while we encourage people to get in touch with flairs who might answer their questions, and bring the relevant threads to their attention, we prefer that you do this by sending them a PM. The public ping puts them on the spot, and if they don't answer (either because the questi...
How is damage (in dollars) done by, for example a natural disaster, calculated?	[ "You can literally sum the values of the stuff destroyed. For more advanced estimates (or bigger numbers) you can also add up the lost hours of labour and extra labour and materials required for restoration. You could also estimate into the future how much money a place would make if it were not destroyed. Usual...	[ "CPA here. I hate Trump, and there are tons of great reasons to hate the guy, but this is just one cherry picked data point that doesn't really tell us anything. The article you read is one big facepalm. That huge loss is called a Net Operating Loss, NOL. The rules for an NOL are pretty clear, and let you deduct t...
How likely is it that the concept of a Mahdi in Islam was derived from messianic Judeo-Christian beliefs?	[ "Well, I'm cautious to use the word impossible, but the thing is, Islam holds the exact same messianic view as Christianity in that Isa pbuh (Jesus) IS THE MESSIAH. And according to Islamic Eschatology, he will return at the end of times to slay the Anti-Christ. In that same eschatology, the Imam Mahdi will aid and...	[ "Y'all are forgetting the real culprit that prevents this process from succeeding. Genetic imprinting means that certain regions of the genome are regulated differently epigenetically depending on which parent (male or female) they come from. So if you have 2 chromosome 15s both inherited from men, then you're goin...
What's the story behind students putting an apple on the teacher's desk?	[ "It's how poor students would pay teachers many years ago. Before schools were publicly funded, families had to pay for their kids to attend school. This resulted more in a barter system where kids of farmers would pay with apples or frequently potatoes." ]	[ "I used to work in retail and the answer is poorly. We can't possibly track any given customer across hundreds or thousands of potential stores. The ban really has two purposes: - It is a deterrent - many customers are too afraid of consequences to show up at the store again. - _If_ we do recognize them, we have ju...
Why do hotels stop serving breakfast so early?	[ "Consider rewording the question,\"Why do hotels stop serving breakfast an hour before check out time?\" It seems nearly obvious when you put it that way." ]	[ "The one that gets me are the reporters down at the courthouse reporting live at 11pm getting the facts. Yeah, thanks, Sparky, the courthouse closed 6 hours ago. no need to be there in front of a dark marble court house where nothing will be happening again for another 10 hours." ]
Why are certain phrases such as "Mom and Dad" or "Salt and Pepper" always said that way and never backwards, like "Pepper and Salt"?	[ "As long as we're talking about this, another interesting tidbit: Adjectives have an order. For instance, we say \"Little iron key\", which sounds normal, but saying \"Iron little key\" doesn't. According to the Cambridge Dictionary, the order goes: Opinion (unusual), size (long), quality (rough), shape (round), a...	[ "Grab a tennis ball and a lamp. Turn off every other light in the room. Hold up the tennis ball. Half is lit, half is dark. If you are looking from the side (you can see the lamp and the ball) you can see some of the dark side of the ball. The ONLY way to see nothing but lit ball is to have the lamp directly behin...
Exactly how does not finishing a course of antibiotics produce resistant bacteria? If a resistant population develops, wouldn't that population survive the entire course anyway?	[ "Resistance is not binary, i.e resistant/not resistant. If you do not kill all the bacteria, the ones hat are left are the ones that are a bit more resistant than the ones who died. Repeat that cycle enough times and you have a degree of resistance that makes it difficult to treat with normal doses of antibiotics. ...	[ "Ahoy, matey! Yer not alone in askin', and kind strangers have explained: 1. [ELI5: What happens when medication expires and what determines the date of expiration? ](_URL_2_) 1. [ELI5: What happens to medicine that is past its expiration date? Is it stronger, weaker, or different somehow? ](_URL_5_) 1. [ELI5: Why ...
If I consume something quite basic, like milk, followed by something acidic, like citrus fruit, does it balance out the acidity that my stomach has to handle?	[ "A) Milk is slightly acidic. B) Stomach Acid is really acidic, way more than anything you'd likely consume and survive." ]	[ "Your gut is a class that has a session everyday. Your native flora are the students that show up to class each day.; they all have their preferred seats, and they won’t give them up without an argument. The probiotics are the new kid; in order for him to earn a spot he has to be consistent. He has to show up at th...
Why do East Asian people generally look younger than Caucasians for their respective age?	[ "Probably because we aren't as used to recognizing the physical cues for age that they exhibit." ]	[ "\"Just about everyone here\" Where is \"here\" for you? It sounds like your question's premise is based on a small sample set based on personal observation. Before your question is addressed, you should be making sure the premise is valid..." ]
Do any of the planets in our solar system have a decaying orbit?	[ "Actually, the solar system is chaotic over large time frames, so you can't really say that an orbit is \"decaying\" (toward the sun) as it might as likely be ejected. You can google for \"chaotic solar system\" to get a list of decent articles. A long time ago, I remember a computer study simulation done of the s...	[ "Radiocarbon dating only works for organic compounds. TL;DR is the ratio of C14 to C12 are stable over time on the earth. While alive, organic things (plants, animals,..) have the same ratio of C14 as the atmosphere. When they die, they stop replenishing C14 supplies and in turn, they decay. So by comparing the lef...
Why doesn't concentration affect the rate constant?	[ "I mean, substitute the Arrhenius equation into a rate law: d[A]/dt = -C[A][B]exponential part = -(prefactor)exponential part So there is a dependence on concentration in the prefactor. But we want a number that applies for all concentration conditions, so we divide those out to get a rate constant." ]	[ "It does. Basically there is one more than the apparent two frames of reference (that of each twin) that need to be taken into account. twin A on Earth (inertial frame) twin B traveling away (inertial frame) *twin B traveling back (undergoes acceleration and shifts frames) One twin undergoes the turnaround while...
Did the Japanese perform any notably kind acts during WWII?	[ "He was a civilian, but the Japanese diplomat [Chiune Sugihara](_URL_0_) risked his life and career to help more than 6,000 Jews escape Poland and Lithuania." ]	[ "Yeah, please elaborate a little. Are you talking about POWs or people in concentration camps or just normal citizens displaced due to fighting?" ]
Why is it a natural reaction for us to cover our mouths when we see something shocking/disturbing?	[ "I don't think it's a reflex to put your han din front of your mouth. If you look at young children who are startled, they will yank their arms up in a fast motion instinctivly trying to protect their face and head from posible harm. I think when you get older you become aware of that reaction and feel \"embarrased...	[ "Even in wester society there are variations of this, and in some cases it is even reversed. In southern-Italy they \"throw\" their head for 'no', and in Bulgaria they shake for 'yes' and nod for 'no'. The same variations exist all over the globe from culture to culture. Some shake and nod the same way westerners ...
What proof do we have that dark energy + dark matter make up 95% of the universe?	[ "The mechanics of the universe (accelerating expansion, stars on the edges of galaxies rotating faster than they should) hint either at adding dark matter + dark energy or potentially modifying the way we compute motion of stars and galaxies (known as modified Newtonian dynamics). Here is an overview for dark matte...	[ "We don't and that is why the search for different forms of life persists. If very well could have happened more than once. But you should note that all DNA based life shares the common trait of having right-handed dual-helix DNA. Since DNA could have taken multiple configurations it suggests that all of it shares ...
With "unsolvable" math problems, how do people come up with the problem and why do they think the problem is worth solving?	[ "It's pretty simple. Someone wants to know something. Let's take multiplying an even number by an odd number gives you an even number. (obviously this isn't an unsolved math problem, but it is easy to deal with and understand) They realize that for every number they can think of this is true, yet they want to know ...	[ "Okay. So let's say that you want to bake a cookie just like the ones that grandma makes. You could try to eat her cookie, and then using your knowledge of baking sort of reverse engineer it, but it would be an incredible hassle and very hard to do. But if you had the recipe she used, it would be very easy to figur...
getting my head around Special Relativity	[ "Recall that to see light, you would have to see it \"reflected\" off of something and into your eyes. But neglecting that for a moment, since you are travelling away from the source of the light, you would see the light from the source red-shifted. As you approach the speed of light, the light would continue to be...	[ "> So, we are all on this rock going fast around the Sun -- does that mean that time is somewhat slowing down for us when compared to someone who is just floating in space? That depends what you mean by \"floating in space.\" There is no absolute reference frame that we can call the \"reference frame of empty space...
The American Civil War: What is the prevailing consensus as to the constitutionality of the South's secession	[ "The Articles of Confederation provided for a perpetual union, and the preamble to the Constitution said the purpose was to form a \"more perfect union.\" The 1869 Supreme Court case Texas v. White relied on the history of the Union, which predated the Constitution, to reject the case for a constitutional right to ...	[ "Since this is a homework question, we expect a little more effort from you. What research have you done so far for your paper? What are your findings so far? Is there anything specific you have a question about?" ]
How do small insects like ants survive a fall from a,comparatively, massive height whilst larger animals can be injured from a relatively tiny fall?	[ "Terminal velocity. A falling object experiences a downward force from gravity that is proportional to its mass, and drag proportional to its speed and cross-sectional area. When the force from gravity and the force from drag balance, the object stops accelerating. Now, assuming a spherical object (which is a favo...	[ "Part of the presence of pain is its purpose. Your nervous system continues to remind your brain the pain you've experienced so you know to protect it. For us, that means going to a doctor for a broken finger. But in nature, that means \"I need to guard this finger until it heals, or else I may die. If I try to ...
Why do Austria and Australia sound so similar?	[ "Coincidence. Australia comes from the Latin australis, meaning \"southern\". Austria is the Anglicisation of Österreich, which is German for \"eastern realm\"." ]	[ "Check out this video. _URL_0_ It hits your question rather spot on" ]
My ISP claims to provide 16mbps internet, then why does a 16mb file actually take 6-7 seconds to download rather than one second?	[ "MB and Mb are off by a factor of 8 Capitalization is important here. Your ISP is proving 16 Megabit per second internet, the file is 16 MegaBytes. A byte is 8 bits so your actual downspeed is 2 MBps so the file should take 8 seconds" ]	[ "There are a couple of reasons, but the most basic of them is that your body becomes inflamed. Inflammatory processes happen in your body when something needs fixing. In this case, the muscle fibers need fixing (it is good to note, muscle fiber destruction or micro-tearing isn't directly correlated to soreness, but...
How do we know there are four fundamental forces?	[ "> How do we know there are four fundamental forces? We have only observed four types of interactions, weak, strong, electromagnetic and gravitational. There could be more (there was a surge of interest in a 5th force for a short time), but ultimately we have only seen 4. > Is there a good reason why this isn't tr...	[ "As many as you choose to include in your theory. Do you have a specific QFT in mind, like the Standard Model?" ]

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