id stringlengths 5 6 | input stringlengths 3 301 | output list | meta null |
|---|---|---|---|
3po14e | pulse vs hearth-rate | [
{
"answer": "**Heart**-rate\n\nYour pulse can have a little extra information on your health. A heart rate is the number of beats per minute that your heart makes, but on top of that a pulse can add the strength and consistency of the heartbeat at the point where it's measured. For example, a pulse can be chara... | null |
evcwlo | how there can be so much money in network tv advertising and so little in comparative online advertising? | [
{
"answer": "What people don't like about broadcast and cable TV is the ads aren't avoidable. Online advertising is easy to block, and streaming services with ads see a lot fewer subscribers than ones that don't show ads.\n\nWith a network TV license and franchise you have geographic exclusivity. For the peop... | null |
1r37tg | Need to explain gravity and falling objects to my 9yo... | [
{
"answer": "Dropping things may not be the way to go. You should try rolling them down a hill. I think this was the way Galileo went about some of his experiments (though not a hill and more precise). I think the only time you'd get into a problem would be with weird shapes so you should be able to do a bit be... | null |
4s4bf1 | in the way that people are able to build their own pcs, how far away are we from being able to build our own cellphones? | [
{
"answer": "The major issue there is that most cellphone technology is extremely compact and build to fit around preselected parts where computers have components that can come in diffrent shapes and sizes, the designs are also far less modular. When I replied my iPhones charging port I had to use tweasers to ... | null |
31uzwn | what is programmatic advertising? | [
{
"answer": "Using programming (computers) to buy ads. Some are sold in what's called real time bidding. Basically when you visit a website with the ad in question whoever is selling the ad starts a short \"auction\" among some competitors and whoever has the highest bid gets the add and that's what you see. ... | null |
2qeoyc | why do you hear so much more regarding desperate and lonely men rather than desperate and lonely women? shouldn't there be more or less an equal amount of both? | [
{
"answer": "If a guy bitches about being lonely anywhere public, he may get listened to or ignored, perhaps ridiculed. If a woman bitches about it, she is likely to be inundated with sex offers and pictures of naked guys from the previous sentence, which is unlikely to help her, so they are likely more silent ... | null |
3iarsy | how is orange juice economically viable when it takes me juicing about 10 oranges to have enough for a single glass of orange juice? | [
{
"answer": "Also the citrus processors extract things like oil from the peels, they don't just squeeze the juice and throw the rest away.",
"provenance": null
},
{
"answer": "They use machinery that grinds the orange down to more or less nothing, and can extract every tiniest little drop of juice f... | null |
2601fs | Do we know of any contact between Ancient Egypt and East Asia ? | [
{
"answer": "Ah. I enjoyed that book and it does an excellent job of telling stories, but yes, it's age shows in quite a few places. Short answer: no.\n\nEssentially, the book is proposing a model called diffusionism, although hyper-diffusionism might be more accurate. This was a theory, or more accurately a me... | null |
3ojkbo | why do some women look super pregnant at 8ish months, yet others are barely noticeable? | [
{
"answer": "The boring, obvious answer is that women have a wide variety of body types and sizes. A tall, larger woman will appear less pregnant than a short, small woman. A woman with a tiny waist will show a pregnancy more than a woman with wide hips. ",
"provenance": null
},
{
"answer": null,
... | null |
11ivvp | Is the next generation of humans getting stronger and taller than the previous one? Also when would it stop? | [
{
"answer": "Humans are generally getting taller and stronger than previous generations. Many scientists believe this is due to nutrition (increased calories, increased protein intake) rather than genetics. Given that vitamins and proteins are ubiquitous, it is unlikely that height would increase as a function ... | null |
2to4k3 | What is the place of the battleship Yamato in the Japanese consciousness/culture? | [
{
"answer": "I would definitely say the Yamato has some sort of place in the hearts of the Japanese people even today. In the late 30s, when it was laid down it was praised for being the biggest battleship in history and at the time many people still thought that size was the most important feature for these ki... | null |
3ai7kn | Going into the Korean war, did the US ever have the goal of completely absorbing the north into the south, or was an eventual retreat from the Yalu planned? | [
{
"answer": "Going in was long before the Yalu. The intent was simply to keep the south from being incorporated into the north. Americans' concern was not to be embarrassed by having to retreat from Pusan. There was no UN mandate to do more which is why it was a UN police action, not a US war. Anyway, America ... | null |
3w8d37 | Is there literally ZERO resistance in superconductors or is it just miniscule or neglectable (like stuff normally is in real-life as opposed to theory)? | [
{
"answer": "The best theory we have suggests that the electrical resistance of a superconductor can be exactly zero. Unfortunately it's a bit tricky to definitively validate this result experimentally since we simply can't measure a resistance of 0. Even though [most experiments seem to show that the resistanc... | null |
frtb4m | Just how long has vinegar been around in any form? | [
{
"answer": "Vinegar is created by *acetobacter,* a kind of bacteria that is naturally occurring- notably, occurring in the guts of fruit flies. When yeast ( a fungi) encounter sugar, they will start to ferment it into alcohol. If *acetobacter* bacteria are present ( and, of course, that can occur because frui... | null |
2oc4vz | When was the second first developed as a unit of time? Were there any areas where a different standard was used? | [
{
"answer": "hi! I've got a pile of links for you, so settle in...\n\nFirst up, the FAQ has a couple of posts on [Hours, minutes, and seconds](_URL_11_)\n\nOrigins\n\n* [Has everyone always used a 24 hour day?](_URL_5_)\n\n* [As far as I can tell, nearly all of the world divides a day into 24 hours, each of whi... | null |
sx9ji | When, how, and why did sports (in general) become such a high-dollar enterprise in the United States? | [
{
"answer": "( I'm typing this on my phone, so please excuse any grammar/spelling mistakes)\n\nAlthough I'm not an expert, I would have to guess this happened around the late 1800s/early 1900s. During this time Americans disposable incomes and leisure time increased due to achievements by unions and other avera... | null |
7mt07q | after showers, whenever i rub my skin i get rolls of dirt/dead skin cells. why is this? | [
{
"answer": "You need to exfoliate better. Or shower more often. Grab a wash cloth or loofa and wash, don't just use your hands.",
"provenance": null
},
{
"answer": "(disclaimer: I'm no scientist.) Your skin regenerates/replaces itself every 27 days, that means, shedding off old skin cells, and repl... | null |
6fqopp | why does 25 mph on a bicycle seem so much faster than in a car? | [
{
"answer": "Because you don't have metal/plastic guarding your body. You can feel the force of the wind completely. ",
"provenance": null
},
{
"answer": "I credit being closer to the ground makes it feel like you are going faster. Going even 15mph on a bike vs a skate board is a noticeable differe... | null |
4zxyqc | Zion Harvey got a double hand transplant at 9 years old. Will his hands continue to grow along with the rest of his anatomy as he ages? | [
{
"answer": "Yes the cells will keep working normally and normal physiological growth is expected. Abnormal groiwth is also relatively common (please correct me) due to post transplant medication that supresses the immune system thus not stopping some spurs of organ/limb growth that medication would normally s... | null |
6e8ysm | where did trigonometric functions come from? and why do they work? | [
{
"answer": "Trigonometric functions were developed by various ancient cultures, mostly dealing with measuring astronomic phenomenon which requires dealing with angles and triangles and such.\n\nBasically, we had a certain set of questions (if you know the sides of a triangle how to calculate its angles, and vi... | null |
27kpp9 | what happened to telescoping fm antennas on cars? | [
{
"answer": "None. The smaller antennas are less efficient. In other words, if you drive an 87 Cutlass out of a city for 75 miles, you might still be getting some of the radio stations. If you drive a 2014 Santa Fe out of a city, you might lose that city's stations at 60 miles.\n\nBut, with more in-car entert... | null |
2gqi65 | if heat rises up, why does global warming occur instead of the heat just dissipating through outer space? | [
{
"answer": "global warming is the buildup of gasses that PREVENT exactly what you are talking about (heat dissipating up, its called albido). These gasses act like a mirror pointed back at earth, reflecting said heat back into the system.",
"provenance": null
},
{
"answer": "Its not that heat rises... | null |
i4o29 | Would we be able to detect an extraterrestrial spacecraft in orbit around our Sun? | [
{
"answer": "[Voyager](_URL_2_) or [Voyager](_URL_0_)? :P\n\nIn all seriousness though, [this](_URL_1_) says that by 2028 we hope to have detected 90% of all near-Earth asteroids of diameter 140 meters or larger. So it's *very* unlikely we'd detect a Voyager-sized spacecraft in orbit around the Sun (unless it h... | null |
2ef6ow | what is the catch with those auction sites that claim to sell ipads and high end laptops for $20? | [
{
"answer": "They charge you a fee for each bid and this fee is usually substantial. Also you may have laptops going for $20 once in a blue moon, but I'll be that most of them go for close to retail.",
"provenance": null
},
{
"answer": "You have to pay for each bid, and you can only improve the pre... | null |
1texlf | What were the casualties expected in an invasion of mainland Japan and how did they compare to the actual casualties caused by using nuclear weapons ? | [
{
"answer": "The atomic bombs dropped on Japan killed at least 150,000, and probably more than 250,000 eventually died as a direct result of the bombings. Just to keep things in perspective, neither the bombing of Hiroshima or Nagasaki were individually as deadly as the March 9-10 1945 firebombing of Tokyo (10... | null |
18t2d9 | Is there proof of mutation introducing new material into the genome? | [
{
"answer": "How your friend put it is a bit misleading.\n\nMutations happen all the time. And they aren't noticeable because many don't cause any change in that gene's function. Point mutations occur in which bases (nucleotides in your DNA) are altered. There are insertions, deletions or frameshifts.. which I ... | null |
2mwm7d | Why isn't the sky completely white at night? | [
{
"answer": "You've hit upon a very old question called [\"Olbers' Paradox\"](_URL_0_).\n\nThe solution relies on the fact that the universe is not infinitely old, so only finitely many stars and galaxies are observable and they collectively subtend an angle on the sky much smaller than the full sky.",
"pro... | null |
42tshr | what causes a rolled up piece of paper to act like a spring and what other materials want to naturally return to a flat sheet when rolled | [
{
"answer": " > Are there other elastic materials similar to these that would want to snap back to a flat sheet?\n\nSure. They're everywhere. Metal, plastic, wood, rubber, and on and on. Pretty much any common solid material will snap back to its resting arrangement when you let go, provided you don't stres... | null |
13y7y3 | Wednesday AMA: I am Mr_Bimmler, ask me anything regarding WWII Weapons or Vehicles. | [
{
"answer": "Let's talk about the Thompson M1928 in British and early American service, pre-M1 models. How many of this particular model was fielded and how much of a bother was the front grip to those who used it in action? I've heard accounts of the front grip getting stuck in webbing or pulling on uniforms w... | null |
1om4xl | why is cyberbullying a problem? | [
{
"answer": " > Basically my question is this, if you're being bullied over social networking (or even through your phone) why continue to participate?\n\nYou don't have to participate directly for it to affect you. Even if you ignore the bully, if other people in your social group are still paying attention t... | null |
6k4psl | Cathedrals are large and ornate, necessitating significant investment to construct. Did Cathedrals they serve any practical purpose for the village/town/city aside from hosting religious proceedings. | [
{
"answer": "For clarification, is there a specific time period or geographical area in which you are specifically interested?",
"provenance": null
},
{
"answer": "There actually are a few ways that churches functioned aside from housing worshipers for Mass, but these are, of course, directly relate... | null |
1sh4zt | Why does snow accumulate in stripes? (Pic) | [
{
"answer": "It is because of wind. It works like sand dunes. You start with an even accumulation, then wind blows in one direction. Imperfections in the ground surface cause some flakes to stick, and others stick to them, until all of the snow is in drifts.",
"provenance": null
},
{
"answer": nu... | null |
4b6npl | how does soaking a piece of clothing in milk remove red wine stains? | [
{
"answer": "You're extracting the compounds In wine by using density extraction. Milk is more dense than the wine compounds so it ends up pulling up the less dense components. Source: I'm a Biochemistry student",
"provenance": null
},
{
"answer": "Potassium metabisulfite... it's in the wine anyway.... | null |
1e9el2 | Monday Mysteries | Ancient Ruins | [
{
"answer": "Ok, what stuff on Ancient Aliens really is a mystery?\n\nI'm not asking about the alien stuff, just if a ruin that they've talked about really is a complete mystery and we don't know why or how it's there.",
"provenance": null
},
{
"answer": "Since it was the first thing that popped int... | null |
5llx01 | how are my headphones playing a "ghost station"? | [
{
"answer": "Pirate radio yyarrr! This is actually normal and happens with low quality speakers. Essentially the wire in your headphones are not shielded well so they are acting as an antenna. They are able to pick up a certain AM frequency because of this. I actually was able to once get legitimate pirate musi... | null |
5r4z1i | when using my smartphone camera why is video darker than photos for a given light level? | [
{
"answer": "Exposure time. \n\nWhen you take a still-shot, the camera can pause to take in a large amount of light - after all, nobody is moving around much (hopefully) and there's no rush to get another shot in within the next few ms.\n\nWhen you're taking a video, however, the camera has at most 30 ms to tak... | null |
alrkr2 | what happens to the human body that makes it feel like cold isn't cold? | [
{
"answer": "Your body can't actually sense temperature. It feels heat being absorbed or lost. So when you are losing heat your body tells you that your surroundings are cold. The more heat you lose the more you perceive your surroundings as being cold. Also, the greater the temperature differential between... | null |
3v2qxo | music equalization (as it pertains to mixing)- what's the deal? | [
{
"answer": "Boosting = making a certain range of sound frequencies louder\n\nCutting = making a certain range of sound frequencies quieter\n\nI'll post sample pictures in a bit.\n\nEDIT: Here is an [example](_URL_0_). \n\nSo for me, I make hip-hop beats. When I'm making beats from sampling + chopping, I always... | null |
4h7k91 | A balloon filled with helium goes in the opposite direction of earth's gravity. Not only does it overcome the force, but it also travels up. What would happen to a balloon in deep space? Would the helium stay put or would the balloon split and the helium go in all directions? | [
{
"answer": "It is not fighting gravity. It is just lighter than the air around it. The air is pushing it up, much like air bubbles rise in water.\n\nSpace is a vacuum, so it depends on it's initial course. If the helium escaped Earth's atmosphere it would not keep 'rising'. Earth's gravity would still pull it.... | null |
3n0fjs | What did a Civil War "supply line" actually look like? | [
{
"answer": "So let me first explain a little bit as to what a supply line would have looked like. It would have been a massive wagon train, stretching out across the road filled with laboring beasts, sweating workers, and stench of feces and a great unwashed mass. Jostling underneath wagon covers would be ever... | null |
1c0kln | how do fossils of an action or event get made? | [
{
"answer": "That's not a \"stone\" type of [fossil](_URL_3_) but insects trapped in amber which is a [fossil resin ](_URL_2_).\n\nThe insects got trapped in the [resin](_URL_0_) from a tree and that kept them intact over the ages when it turned into amber.\n\n[_URL_4_ article on the find](_URL_1_).",
"prov... | null |
53rfsc | After we get a cut, I read that our blood vessels have to grow back at the site of the wound. Do the blood vessels always grow back in the same pattern as before, or can they grow back in a different way? | [
{
"answer": "The vessels will initially be found along the most efficient pathway to distribute the blood, so there isn't a need for creating more than necessary\n\nIf the cut has damaged the area around it so much so that scar tissue doesn't allow for this path to be remade again, then a slight change in desig... | null |
5djz7r | why does metal heat up so much when crushed under a hydraulic press? | [
{
"answer": "How do I add a flair on mobile?",
"provenance": null
},
{
"answer": "Almost every metal is made up of crystals - ordered arrangements of atoms. Some metals are made of very small crystals, some are made of large crystals, and some very special metal parts can be made of a single crystal... | null |
yf964 | french politics and law | [
{
"answer": "Please be more specific? Political parties or how politics work? All the laws would be challenging... do you have something in mind?",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "5843419",
"title": "France",
"section": "Se... | null |
284m05 | who started 'high-5s' and are they universal? | [
{
"answer": "Well, I don't know if they are universal, but here in Brazil we high-5. \nBut we are a somewhat standard western culture (though we are third world) and our culture (specially television and movies) is very Americanized. So this is not a very representative sample.\n\nEdit: Just to clarify, we don'... | null |
16hsr7 | To what extent did resistance groups in WWII fight each other? | [
{
"answer": "This applies specifically to the danish resistance groups, since i really don't know that much about other countries' groups. \n\nIn Denmark, there were to my knowledge no actual fights between groups. All the groups were dependent on supplies from England, and the communist groups received much fe... | null |
4kdyen | What differences, if any, were there between Soviet and Western (American, British, French) tactics in countering Blitzkrieg tactics in WW2? | [
{
"answer": "Follow up. Was Blitzkrieg even a real German doctrine in WW2?",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "2856495",
"title": "Deep operation",
"section": "Section::::Intended outcomes; differences with other methodologie... | null |
5ztju7 | why do turtles grow as large as their tanks? | [
{
"answer": "It's not totally true. Turtles will grow as big as their genetics and nutrition and other factors let them. Turtles actually have their growth stunted in an unhealthy way by being in an environment too small, not due to the physical environment alone, but also by the nutrients available in said env... | null |
5qo7s0 | how can countries be banned from the u.s. based solely on their religious majority? | [
{
"answer": " > How is this possible with rights guaranteed by the first amendment? \n\nRights laid out in the US constitution only apply to US citizens, or people on US soil. If you're a foreign national in another country, the US doesn't have to give you any rights; that's the job of the country you're curr... | null |
26d4cy | Would a planet-sized ball of liquid water in space have a solid core of "hot ice" the same way Earth's inner core is solid? | [
{
"answer": "At high pressures water will form a solid at any temperature. Wikipedia has a rather detailed phase diagram for water:\n\n_URL_0_\n\nOf course the specifics will vary; it'd be very unlikely for a planet to form exclusively from water, so getting a water-only core becomes difficult.",
"provenanc... | null |
1qz64h | why has stop snitchin' remained so popular in low-income us populations? | [
{
"answer": "Because every one gets out if jail... And then they come back... And then ^^^ that guy",
"provenance": null
},
{
"answer": "People in low income situation usually have short term goals as opposed to long term goals. And in many low income areas criminal populations hold more power then... | null |
1qivbe | Are Southern Chinese really Han Chinese? | [
{
"answer": "Now firstly it must be made clear: \"Southern Chinese\" is not a single homogenous group. There are several major ethnic group that usually called Southern Chinese. These are:\n\n- Hokkien/Fujuanese: people from Fujian. This province is the most mountainous province in eastern China. During early H... | null |
9a5cie | what is insomnia and why can't our brains shut off when we're excessively tired | [
{
"answer": "Insomnia can be caused by many things, but one of the most common causes of insomnia is a non-functioning ability to produce the chemical that makes us begin to fall asleep.\n\nOur brain (neurotypically) naturally makes all of the chemicals we need on a given day to function. One of them, melatonin... | null |
12v2oa | To what extent did the Axis power coordinate their actions/strategy in WWII? | [
{
"answer": "There was little to no military cooperation between Berlin and Tokyo, but some cooperation between Berlin and Rome, as well as the other German allies. However, Hitler did declare war on the US in 1941 following Pearl Harbor, and not the reverse.\n\nThe Hungarian, Romanian, Finnish and Italian arm... | null |
2ym1zx | What set the precedent for the "campy" style of early superhero pop culture? As opposed to the gritty/realistic style we see today. | [
{
"answer": "can you clarify the timelines you are thinking about? The really campy stuff doesn't start until the 60s after the pushback from the book \"seduction of the innocent,\" (where criticism of superhero books was included along with other violent comic books) sparking a moral panic and the comics code.... | null |
2blqsb | Was there ever a time and place, before alcohol regulation, where it was acceptable for children to get drunk regularly? | [
{
"answer": "You seem fairly familiar with the common practice of giving smaller children beer before potable water was widely available, and the idea of \"drinking water\" would have seem foreign to adults and children alike. \n\nThere is another practice that might interest you, which involves giving a baby a... | null |
2ersnn | Can bacteria survive in a freezing enviroment? | [
{
"answer": "[Psychrophiles](_URL_0_) thrive at very low temperatures. Such as wiki states, temps as low as -20C. They're part of extremophiles which cover all 'extreme' environments from high heat, to acidity, and metals.",
"provenance": null
},
{
"answer": "More of an addendum since this direct ... | null |
116i1c | Does hair growth add weight? | [
{
"answer": "You would get heavier as you consumed food. Hair, in this analogy, can be seen like sweat. The only difference is that it's an excretion you retain, instead of one that evaporates. ",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "2494084"... | null |
ay8rdy | how come that in every mayor city there are hundreds of pigeons but you never see any dead ones? | [
{
"answer": "Two words: Turkey buzzards.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "229962",
"title": "Feral pigeon",
"section": "Section::::Population control.\n",
"start_paragraph_id": 31,
"start_character": 0,
... | null |
1g0fzf | will you explain to me the chi-square model when applied to genetics? | [
{
"answer": "The chi square model is a way for people who study genes to understand probability. If two traits are inherited by a child (like blue eyes and a small nose), what are the chances they were inherited together randomly, out of all the options it could have been? The other option is that these genes a... | null |
3emnnf | Why didn't Einstein get a Nobel prize for Relativity? Was the paper on the photoelectric effect really more important? | [
{
"answer": "The first thing to remember about [Einstein's Nobel Prize](_URL_1_) is that it was given for \"his service to Theoretical Physics, and especially for the discovery of the law of the photoelectric effect\" So it was not strictly given to him for the photoelectric effect. But to understand why that... | null |
8ed54n | why are real number data types such as float and double called "floating-point"? | [
{
"answer": "Floating point data types stand in contrast to fixed point data types\n\nA floating point number has a value, and an exponent for scaling\n\nA fixed point number has a value, the scaling exponent is set by the system and is the same for all fixed point numbers you're using at a time\n\nFloating poi... | null |
7qpsm8 | why is it so difficult to figure out how life actually started? | [
{
"answer": "nobody was there to witness it and tell us what the conditions were. that kinda puts a hamper on things. the conditions of Earth 3.8billion years ago is very much different than it is now. and we don't even know if life was \"seeded\" or if it grew naturally out of the conditions.",
"prov... | null |
2i62c8 | Why does the ticking of my clock mess with the display on my TV? | [
{
"answer": "Battery powered clock? Usually those use a pulsed electromagnet to advance the gearing once per second. They create a small \"EMP\" electromagnetic pulse. Tune an AM radio between stations, and it may pick up the one-second pulse as a click sound.\n\nBut this shouldn't affect your TV unless it... | null |
262iiu | creative commons | [
{
"answer": "Whenever a person creates a work like a photo, drawing, song, poem, etc., they own the copyright to it. That means that, aside from fair use, they have the exclusive right to distribute, sell, or otherwise use it. Creative Commons is basically a way for creators to allow others to use that work, us... | null |
8kt1xu | why is it that we can't see gases in their pure form, yet we can see the shadows of gases on a sunny day? | [
{
"answer": "Plenty of gases have color in their pure form.\n\nWe can see shadows on hot days because air expands and then moves. And light changes a few properties when switching between mediums, so that movement of air and change in density is what makes the light wavy (gives interference patterns).\n\nBut th... | null |
1c8eda | What were the relative advantages and disadvantages of varying melee weapons during the middle ages? | [
{
"answer": "Since a historian hasn't responded to your question, I hope I can post these video links from a TV show that looked at \"alternative\" weapons such as a flail, mace, falchion, etc. :\n\n_URL_2_\n\n_URL_1_\n\n_URL_0_\n\nThe host discusses some of the advantages and disadvantages of these weapons. Ho... | null |
3g0aan | what does the 3-2-l mean in some automatic transmissions in cars, what are their purpose? | [
{
"answer": "3rd gear, 2nd gear, Lowest gear. Automatic switches gears automatically of course, but doesn't always give you the power you may want, so those options allow you to manually downshift and give your car more power. ",
"provenance": null
},
{
"answer": "Drive allows your car to use all of... | null |
1ytwpw | why do my eyes become hard to keep open when i'm tired? is it the brain trying reduce stimuli and rest? | [
{
"answer": "Eyes are controlled by ciliary muscles. As do all muscles, when you are tired you muscles start to become harder to use. E.G, when you lift weights, the longer duration you lift for, the more fatigued you get. Same principle. ",
"provenance": null
},
{
"answer": null,
"provenance": ... | null |
8dykbf | Josip Broz Tito spoke Kyrgyz? | [
{
"answer": "Tito did spend some time in what is now Kyrgyzstan during the Russian Civil War. From 1918 to 1920 he was hiding out in a village near Osh, the main city in the south of Kyrgyzstan, and eventually married an ethnic Russian from there.\n\nHowever it should be noted that the region is, and was, mainl... | null |
33prru | if volcano eruptions are from pressure buildup, why not just drill and relieve the pressure? | [
{
"answer": "That's a monumentally risky endeavor for so little reward. You could get seriously burned, possibly trigger a real volcanic eruption, and release toxic gases into the atmosphere. Furthermore, as long as the core is hot, volcanos will still erupt, and the nuclear fission of the uranium in the core w... | null |
2gcjo2 | why is it that the federal reserve can print money but america has limited inflation? | [
{
"answer": "Because the Feds are not printing enough to cause major inflation... they're not just printing carelessly, which is what you seem to believe. They have a target inflation rate, and print according to that target.\n\nThey only print \"a lot\", because the US economy and demand for the US dollar is t... | null |
1vvtzk | How did the titles of "Roman Emperor" and "King of the Franks", both held by Charlemagne, become separated? | [
{
"answer": "So [this excellent post](_URL_0_) a week ago by /u/idjet explains the circumstances of the passing on of Charlemagne's imperial title, as well as whether he intended to do so or not.\n\nHowever, whatever the details were, after the division of the empire after the death of Charlemagne's surviving s... | null |
5piml3 | why acceleration is constant in a vacuum, and an airplane would fall at the same velocity as a tennis ball? | [
{
"answer": "Because in a vacuum a moving object has no resistance acting on it. Clarify the second part of the question please.",
"provenance": null
},
{
"answer": "The force of gravity acting on an object is proportional to its mass. Mass times gravity = weight.\n\nAcceleration is force divided by... | null |
foa5pe | what is social engineering? | [
{
"answer": "It's a manipulative technique used to get informatiom from people, and the negative context comes from scammers using it to get things such as passwords",
"provenance": null
},
{
"answer": "When you use \"social skills\" (convincing, lying, etc) to make people do something.\n\nFor examp... | null |
36u9b7 | how do celebrities tweet and reply to other celebrities on twitter considering there are thousands of people tweeting them as well? | [
{
"answer": "There are services and software you can use with twitter to let you know when a certain user tweets you or posts a tweet, chances are most celebrities don't even see their fans tweets unless a pr person alerts them to one they should reply to.",
"provenance": null
},
{
"answer": "Most/m... | null |
1riwc2 | How did the wives of roman soldiers learn of their husbands deaths? | [
{
"answer": "Alrighty, 'cause I just noticed this thread, I'm going to go ahead and do a writeup on this. I'm going to try to address all of the questions already asked in the body, so bear with me (barring the question that's outside the purview of my specialty). \n\nFirst, I'm going to confirm a simple fact. ... | null |
2haeyj | Would it ever be possible to create a mirror that reflects 100% of the light it's exposed to? | [
{
"answer": "Yes, but not in the traditional sense. \n\nMirrors are normally made of a polished metal surface covered by glass. This kinds of mirrors are theoretically unable to achieve perfect reflection. \n\nIt is possible to achieve perfect reflection using total internal reflection, and it has been done bef... | null |
1xad8d | why are there airpockets in underwater caves that are clearly under sealevel? | [
{
"answer": "Plants in the sea create oxygen. ",
"provenance": null
},
{
"answer": "The caves may have a hidden opening or cracks somewhere to allow air in. If not the air pockets may come from methane or carbon dioxide from degradation of organic matter on the sea floor or some kind of natural gas ... | null |
21yml4 | How are the causes of airplane crashes identified? | [
{
"answer": "Well, from the \"something broke in the air\" perspective; fractures that occured in the past look a lot different than fresh ones, and fractures from impact look a lot different than fractures [from other causes.](_URL_1_)\n\nImagine a crack in a steel part, for example. If the crack slowly propag... | null |
241eky | To what extent was Stalin responsible for the Korean war? | [
{
"answer": "According to Halberstam's \"The Coldest Winter\" page 49\n\n\"Stalin was playing a delicate game, flashing a half-green, half-amber light on the invasion.\"\n\nHalberstam later states that Stalin gave Kim permission, but kept his involvement to a minimum and told Kim to rely on China for any materi... | null |
scfgo | What would happen if we allowed exotic animals to go extinct? | [
{
"answer": "Most of the megafauna do have a significant impact on their environment. Lions and tigers are significant predators, and if we removed them, we would see the increase of the larger herbivores. In the United States, we removed wolves and mountain lions, and now deer go through natural boom/bust cy... | null |
5of6vd | how does cold air reach body temp in your lungs so fast? | [
{
"answer": "There are small sacs in your lungs that bring the incoming air in close contact with your circulatory system. This quickly brings the air close to body temperature , as well as enabling the transfer of oxygen and carbon dioxide. ",
"provenance": null
},
{
"answer": "Not a full explanati... | null |
8cyjvx | If I have a system of mirrors that makes 300 million meters could I see the speed of light? | [
{
"answer": "Yes you can. This is used to determine the speed of light experimentally (There is an easy demonstration using fast rotating mirrors, look at how Fizeau and Foucault measured it in in the 19th century).\n\nYou can also do an easy experiment if you have access to an oscilloscope. An electromagnetic ... | null |
1fgifs | have humans created a new species? (via selection) | [
{
"answer": "The most obvious examples of new species created through selective breeding are all the various domesticated plants that are a result of polyploidy (errors causing the daughter organism to have more copies of each chromosome than normal.) Those are two numerous to list, and include a wide variety ... | null |
4hif9j | why do some foods contain insect parts? | [
{
"answer": "If you have an open vat of tomatoes, say at the ketchup making plant, bugs are going to get into it. Then you take all those tomatoes and put them in a machine that pulverizes them. The machine doesn't differentiate between bugs and tomatoes, it just makes juice out of whatever is in the storage co... | null |
5mm6jr | why are serif fonts "easier to read in long paragraphs of text?" | [
{
"answer": "There's actually no conclusive study on this that shows that serif fonts are genuinely easier to read than san serif fonts. \n\nThe idea is that the extra markings make a letter more immediately distinguishable from another letter. By having more angles on a letter, there is sharper contrast to one... | null |
5877e1 | can sound waves create other sound waves? what would those sound like? | [
{
"answer": "Absolutely! Sounds waves are just a vibration, and cause other objects to vibrate as well. Primary waves create what are called overtones and harmonics as they interact with the air and surrounding surfaces.\n\nIf you go to a piano and play one of the lower notes loudly and hold the key down, you w... | null |
6wix89 | What warcrimes did the Dutch commit in the Indonesian Independence war in 1945-1949 | [
{
"answer": "The Dutch historiography and research into war crimes conducted by the Dutch army during the Indonesian independance war is not very well researched. This because it was 'actively forgotten' by the Dutch governement in that no serious research was conducted , people involved were encouraged to rema... | null |
6b0ie4 | how does the bar exam work and who governs it? | [
{
"answer": "In the United States, each individual state has its own bar exam, and it is generally administered under the authority of the state's highest court. For example, the Illinois bar exam is administered by the Illinois Board of Admissions to the Bar (IBAB), and IBAB is seven lawyers appointed by the I... | null |
2x5aps | Is it possible to estimate the cost of constructing one of the great pyramids (adjusting for inflation)? If so, how expensive of a project was it? | [
{
"answer": "Ancient Egypt didn't have a monetary system until 2000 years after the pyramid's construction so it is probably better to use work hours and the cost of employing workers as a comparison, especially because the value of today's money is heavily warped compared to a barter system.\n\n---------------... | null |
2bvvh1 | if i rinse out a dish right after using it and there's nothing on it, is it fully clean or do i still need to use soap? | [
{
"answer": "Clean is a state of mind.",
"provenance": null
},
{
"answer": "Come on, man. Soap.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "3263286",
"title": "Dishwashing liquid",
"section": "Section::::Primary uses.:Han... | null |
yul55 | What is the cost of the extinction of individual species? | [
{
"answer": "Answering that question requires two other questions be answered: \"How important is the niche this organism is in?\" and \"How well can other animals fill in that niche?\" Many species are more critical to the survival of an ecosystem than others. For instance, in the Southern US gopher tortoise... | null |
ariqqp | how likely is it that earth is the only planet with living beings, and that humans are the only species that have the intelligence to speak, create, develop etc? | [
{
"answer": "We have no good way to calculate those odds. However there are strong indications that the universe is infinite in extent so even if the development of life is vanishingly unlikely it is basically certain that it has happened somewhere else.",
"provenance": null
},
{
"answer": "Probably... | null |
7vd9qs | what is mthfr gene mutation? | [
{
"answer": "The MTHFR gene has the instructions for the body to build an enzyme with a really long name. An enzyme is a protein that helps the body perform chemical reactions. This particular enzyme helps make methionine, one of the building blocks of proteins, and helps the body to use vitamin B9 (also know... | null |
24ajlu | the handicap hypothesis/principal in sexual selection | [
{
"answer": "Rich person wants to convince a potential mate that he/she is worth mating with. Rich person has so much money that they can afford to spend much of it on frivolous material goods that may actually decrease their ability to survive (dangerously fast car). This signals to a potential mate that they ... | null |
8kjboe | the significance of platonic solids, what makes them different from the other shapes? | [
{
"answer": "They are polygons (3D shapes made up of flat surfaces joined together) for which:\n\n* the faces are identical in shape and size\n\n* the faces are regular polygons (so all their angles equal and all their sides are equal)\n\n* the same number of faces meet at each vertex (corner) of the polygon\n\... | null |
b6alcn | Why do depictions of American Indians never show men with facial hair? | [
{
"answer": "You may be interested in the older post:\n\n * [Native Americans generally didn't have beards. Do we know what they thought of the bearded and mustachioed Europeans and their decedents?](_URL_0_)\n\nMany groups plucked facial hair, with wooden or shell or even bronze implements. Others apparently s... | null |
jdfti | why drugs companies give half the people placebo's and half the people the actual drug when testing | [
{
"answer": "Lets say you give 10 people a new drug and 5 of them get better/improve, you might think that 50% of the people who take the drug get better. \n\nIf instead, you give 10 people the drug and 10 people a placebo and 5 people from each group get better, than you know that the drug isn't (neccessarily)... | null |
375ujs | the science behind the charlie charlie pencil game | [
{
"answer": "The kid off camera to the right is blowing slightly, moving the pencil. Try it yourself, it takes very little wind to move the pencil. You can tell because they never show anybody in frame when the pencil is moving.\n\nThis is really no different than the telekinesis trick James Hydrick used to mak... | null |
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