id stringlengths 5 6 | input stringlengths 3 301 | output list | meta null |
|---|---|---|---|
6lovv4 | the g20 summit. | [
{
"answer": "It's the biggest 20 industrial and threshold nations coming together and arguing about the most important current and future challenges. How we're going about globalisation, what we're going to do about North Korea, what we're going to do against climate change. It's all discussed there in those fe... | null |
91q3yi | How did ancient Asian steppe warriors fight each other? | [
{
"answer": "I'm loving the questions this week. I'm gonna have some fun with this and go into everything from warfare to military equipment. I'll mostly be using the Scythians, Alans, and Huns as examples, but much of this applies to other cultures and I'll expound on that some.\n\nInformation on Steppe Warfar... | null |
yuwsk | why does it seem the larger any particular group get, the more stupid it becomes. are human beings just naturally inclined to be dumb? | [
{
"answer": "Fuck, i made a typo while asking a question about stupidity. Forgive me internets.",
"provenance": null
},
{
"answer": "Human beings, like many species, are highly social animals. We are strongly driven to ensure we \"fit in\" with the larger group. This has advantages of course, which ... | null |
2fs703 | Is there any evidence that being put under anesthetic permanently alters your behavior, personality, or mental health? | [
{
"answer": "It is well established that some patients (especially older people) show temporary signs of delusion, halllucinations, memory loss and other mental and cognitive changes after surgery involving anesthesia. \n\nThis condition is known as postoperative delirium or postoperative cognital dysfunction a... | null |
5d9kfm | why do so many animals, excluding humans, have retractable 'male genitalia'? | [
{
"answer": "Most animals are much closer to the ground than we are, and dragging your frank and beans around would damage them. Other than that, they also have to consider the target that blood-vessel rich genitals present in a fight.\n\nMostly though, I suspect that you'll find distance of abdomen from the gr... | null |
1mf26j | in computer software, what is the difference between a program, service, thread, process etc.? | [
{
"answer": "A program is a very general term for any piece of software. Your internet browser is a program. Your word processor is a program. iTunes is a program. Each app on your smart phone is a program.\n\nA process can be thought of as a program that is running. On the same computer, you can have the same ... | null |
4agnxk | suppose I dropped you in constantinople in 659 and then in 1167, what differences would you expect to see? | [
{
"answer": "Any answer is inevitably going to be patchy. Our knowledge of the seventh century is much poorer than what we have for the twelfth. We are much better informed about religious foundations than the demography of housing, for example. For a general and highly readable account of the city at the end o... | null |
sdw42 | Could we replace eating with nutrient injection intravenously? | [
{
"answer": "Yes, [Total Parenteral Nutrition](_URL_0_) is a reasonably common intervention, used when for whatever reason a patient cannot tolerate oral food. Its normally used only in the short term (weeks/months) but it can replace normal digestion indefinitely. There are a number of important side effects, ... | null |
322ulv | Did British military officers during the Napoleonic Wars receive training? | [
{
"answer": "Please bear in mind that Cornwell is a novelist and is trying to create an atmosphere in which his \"working class hero\" can be seen to be particularly successful. A dilettante officer wouldn't last long on active service in the field, so although they existed, they weren't as significant as Cornw... | null |
26v7aq | why does the water in the coffee pot *refuse* to pour neatly from the spout, no matter how slowly i pour, dribbling down the front instead until it's half empty? | [
{
"answer": "Surface adhesion, which is closely related to surface tension, which is basically water's property to cling to surfaces. A rougher, more coarse surface is easier for water to adhere to (more surface area). But what you actually need to do is pour faster...pouring slowly makes it more likely to clin... | null |
5m4kfq | How does a charged particle not lose all of its energy even though it constantly generates an electromagnetic field? | [
{
"answer": "The electrostatic field of a charge *has* or *carries* a certain amount of energy and information. It does not need a *constant input* of energy or information from the charge. It does not \"emanate\" or \"flow\" outwards from the charge.\n\nIt's like a dress, not a waterfall. You don't need to con... | null |
4wqtu4 | why can't we harness the vaporized fossil fuel from engine exhaust and use it again? | [
{
"answer": "The exhaust from a standard combustion engine isn't \"vaporized fossil fuel\"; the fuel doesn't vaporize, it combusts, which converts the fuel into energy and then chemical byproducts. Those byproducts are what is exhausted. \n\nNone of those byproducts are particularly energy dense like gasoline i... | null |
7s6vmg | why has it become virtually impossible for politicians on either side to work across party lines? why has "bipartisan" become such a dirty word? | [
{
"answer": "It gives their voters the illusion that they’re fighting for what they want, but the rival party won’t let them get any new laws passed. In reality, they all work together and pass whatever the lawmakers want.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
... | null |
2zhvrr | the different types of logical fallacies | [
{
"answer": "There are a few dozen common fallacies, so it would be tough to explain all of them.\n\n[This should help you learn some of the most commonly found ones though!](_URL_0_).",
"provenance": null
},
{
"answer": "There's tons so off the top of my head, and like you're five: \n\nStrawman: Ar... | null |
1fpeou | If fish can remove oxygen from water, then why can't (or haven't) we created SCUBA gear that can do the same? | [
{
"answer": "Fish are cold blooded, so they need much lesser oxygen than humans (hot blooded).\n\nIn water, the dissolved oxygen content is approximately 8 cm^3/L compared to that of air which is 210 cm^3/L.\n\nAn average diver with a fully closed-circuit rebreather needs 1 L (roughly 1 qt) of oxygen per minute... | null |
269aok | If the testes are on the outside of the body because they need to be at a temperature lower than the body temperature, how come men living in deserts or other hot climates aren't sterile? | [
{
"answer": "Sweaty balls. In hot climates your balls can still be lower than body temperature because sweaty balls. Your surface temperature can drop lower than body temperature with the cooling effects of sweat. Hotter balls do result in lower fertility though.",
"provenance": null
},
{
"answer": ... | null |
tiu4x | How do brass instruments work? | [
{
"answer": "Not just brass, but from my simple understanding, the vibrations from the mouthpiece/reed are amplified as they pass through the instrument. The shape of the instrument affects the tone and pitch.",
"provenance": null
},
{
"answer": "Your lips produce a range of frequencies. The sound w... | null |
1y8c9g | what does a pilot see when they say turbulence is to be expected for the next x duration of the flight? how do they know how rough it is going to be? why can't they just go higher or lower than whatever the weather is? | [
{
"answer": "It depends where it is.\n\nSometimes it's possible to see bad weather visually - large cumulus clouds are nearly always turbulent. Other times it shows up on the weather radar - a device which sends out a radar signal that bounces off of water droplets and shows how big the droplets are.\n\nClear A... | null |
61nlc7 | In medieval warfare, did all soldiers have shields with their lord's coat of arms or is that just a Game of Thrones thing? | [
{
"answer": "Okay, so you're kind of mixing two concepts up a bit here: heraldry and livery. Soldiers have basically always decorated their equipment, but after heraldry became fully established in the 13th century, to bear a coat of arms, whether on shield or surcoat or whatever, was to claim nobility. The spe... | null |
a0vyew | definition of a parsec for an amateur astronomer | [
{
"answer": "3.26 light-years or the distance of an object where the orbit of the Earth around the sun creates a visual **P**arallax of one **ar**c**sec**ond\n\nParallax is the difference in apparent position of an object viewed from two different spots like how an object shifts a bit when you look out just you... | null |
7dw5iu | why do languages from far away cultures have similarities? | [
{
"answer": " If I had to venture a guess I’d say that if the Japanese word sounds similar it’s either because of coincidence, or that word was actually influenced by English at some point.",
"provenance": null
},
{
"answer": "They are literally copying the word. Japan did not have cake until the id... | null |
c8t03c | how can detectives and others match someone's handwriting to a specific person? | [
{
"answer": "The answer is they can't enough for it to hold up in court. They can use it as a detective tool but it is sort of like the lie detector, it doesn't hold up in court.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "267014",
"title": ... | null |
a08fn4 | what happens in your body when you take antidiarrheal medicine? | [
{
"answer": "The most common antidiarrheal medicine is an opioid drug, like morphine, but it doesn't get absorbed from the GI tract very much at all. Opioid drugs really slow down your intestines, so much that addicts often have issues with chronic constipation. When you take this medicine, it basically slows... | null |
1ufhzz | why are some people so prone to cavities? | [
{
"answer": "Some folks just have soft teeth. My family especially is notorious for having \"soft\" teeth, which makes us more susceptible to getting dental issues. \n\nI had to get sealants put on my teeth as a kid once my permanents came in to prevent a lot of nastiness my older family members had to go th... | null |
tc3lu | Why do we work so hard to keep dandelions out of
our yards in America? Are they harmful somehow? | [
{
"answer": "Dandelions are actually good for gardens. They draw nutrients into the soil and attract pollinators. Visually, they can be unappealing, however.\n\n[Source](_URL_0_)",
"provenance": null
},
{
"answer": "Dandelions are generally just removed because they are considered unsightly. For mo... | null |
sb7tn | lenz's law | [
{
"answer": "So it starts with electromagnetic induction. Simply put, a changing or moving magnetic field generates an electric field, and a changing or moving electric field generates a magnetic field. This is simple enough - it's how electromagnets work, and how we generate electricity using spinning turbin... | null |
1oa9st | How can fluid pressure only be dependent of density, height and gravitational pull? | [
{
"answer": "Without getting into too much detail, the simple answer is that the walls of the container are pushing back on the water with the same force the water pushes on them (newtons 3rd law). So in the case with a large bottom and small top, the pressure from the walls keeps the fluid under them at highe... | null |
55ey3w | why do volcanoes contain lava, or do they make it by melting rock or something else? maybe better asked as, where does lava come from? | [
{
"answer": "Molten rock is what is in the centre of our earth where it's very, very, hot. Pressure within the volcano builds and eventually erupts. No one \"makes\" lava, it's a natural product",
"provenance": null
},
{
"answer": "[Within volcanoes is a crack in the crust of the Earth.](_URL_0_) T... | null |
6g24ls | How were the Watergate hearings, and Nixon's resignation, covered in Soviet media? | [
{
"answer": "As a followup, how was Nixon covered prior to that? Was he mentioned often at all?",
"provenance": null
},
{
"answer": "You may find this thread and its top answer by u/desoulis helpful\n\n\n_URL_0_",
"provenance": null
},
{
"answer": null,
"provenance": [
{
... | null |
21eybd | How is it that a 1.3 gig torrent file can support 1080i but because DVD's were inadequate blueray had to be created? | [
{
"answer": "The codecs you'll find used for popular torrents are more lossy than the codec used for Blu-Ray. For videos with equal resolutions, the smaller one will have a lower bitrate, which can mean more compression artifacts, less color accuracy/depth, and/or a lower frame rate. Some Blu-rays us a lossless... | null |
11itmz | what's the joke behind r/circlejerk now only allowing gawker links? | [
{
"answer": "A guy on Gawker published violentacrez's real name, which caused a lot of subreddits to ban all Gawker links.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "52049249",
"title": "List of viral music videos",
"section": "Sect... | null |
66ik4b | how do employees of marijuana dispensaries in the us handle their taxes if their income is based off the sale of marijuana? | [
{
"answer": "The same way anyone else does. Just report the source of the income.\n\nFederal law requires you to report all income, even if it's from an illegal source.",
"provenance": null
},
{
"answer": "They report that their employer paid them to operate a retail shop. The IRS wants to know wha... | null |
3lt47n | why in many nations some people want civil unions on top of state-sanctioned marriages? what are the differences supposed to be? | [
{
"answer": "Because marriage carries certain connotations that people may not want. \n\nYou said that you can get not religious marriages, but marriages are still viewed as being explicitly religious to a vast majority of people, so it still has religious connotations. ",
"provenance": null
},
{
"a... | null |
3lrklz | Can a white dwarf gain material and become a neutron star? | [
{
"answer": "That's what leads to one kind of supernova: the star gains enough mass from a companion star to collapse into a neutron star - or rather, it would if it didn't go supernova in that instant.\n\nThe problem is that a white dwarf consists of carbon (mostly), and carbon can undergo fusion if pressure a... | null |
djbapk | vector graphics | [
{
"answer": "Do you mean the old oscilloscope-style vector graphics or the modern of vector graphics?",
"provenance": null
},
{
"answer": "Classic vector graphics uses a Cathode Ray Tube - an electron beam is controlled by electromagnets onto a phosphorous target. The phosphorous is energized and il... | null |
67uw3l | why newly discovered stars or planets or any celestial bodies were given "code-like" name? for example wise 1828+2650 | [
{
"answer": "As opposed to?\n\nThere are thousands upon thousands of celestial bodies discovered outside of our solar system each year. Giving them all unique names is hard if you're going to give them memorable names. You'll run out of names from the Greek pantheon before you get outside of the \"A\" stars\n",... | null |
a8xza3 | how do live football field graphics appear beneath the players? | [
{
"answer": "You had the right idea already. It is indeed chroma key. The cameras are simply good enough that they can distinguish between the green of the grass and the green in uniforms. They actually need to continually reset the chroma key as the color of the grass changes as the sun moves or when shadows s... | null |
3gnnft | Historians of Reddit, during the time of slavery in the USA, (or slavery in any country/civilization) was there anything that was frowned upon from one slave owner to another? | [
{
"answer": "In early 19th-century North Carolina judicial opinion about this question, of the limits of a master's authority over his slaves, was largely divided in two. While several judges were reluctant to admit that a slave had any rights whatsoever, others found that a master did not have the power to mur... | null |
4otvmf | how exactly did they calculate age during the old testament? | [
{
"answer": "They actually did calculate time the same. Religious people will state that the dates are fully accurate and they did live that long, those that believe it is figurative believe that artificially inflated the ages to make them have more authority and \"wisdom\" attributed to them. ",
"provenanc... | null |
2iv48r | why is it that a person can't take a large amount of over the counter pain relievers, like tylenol or ibuprofen, to get the same effects as stronger pain killers like vicodin or hydrocodone? | [
{
"answer": "Opiates like hydrocodone have an entirely different mechanism of action than ibuprofen or Tylenol. No amount of ibuprofen or Tylenol is going to effect the receptors that opiates effect.",
"provenance": null
},
{
"answer": "That is a really bad idea. It doesn't take much tylenol to over... | null |
6o12pa | Why, in a history point of view, is Germany called Allemagne/Alemania in latin languages, Germany in English and Deutschland in German | [
{
"answer": "On that note, why is it \"Niemcy\" or some derivative in most slavic languages?",
"provenance": null
},
{
"answer": "The name *Deutschland* (German) and other similar names (like *Duitsland* in Dutch and *Tyskland* in Danish) is derived from the Old High German word *diutisc*, which mea... | null |
4vstfq | Do individual atoms move in the wind? | [
{
"answer": "Wind is convection that is caused by weather and the sun. The actual air molecules are moving around due to the interaction between pockets of air having different qualities and the heating/cooling of the surface of the Earth throughout the night/day cycle. \n",
"provenance": null
},
{
... | null |
206snc | why humans are born with parts we can live without (appendix, wisdom teeth, male nipples, etc) | [
{
"answer": "Evolution doesn't craft a perfect organism from scratch, it has to work with the parts it had from the previous iterations.\n\nSometimes useless pieces get left in because there's no real reason to remove them.",
"provenance": null
},
{
"answer": "There is an evolutionary function for t... | null |
64vy9i | How does premature birth affect development throughout life (epigenetics?) | [
{
"answer": "First of all be aware of correlation and causation - your ADD may or may not be related to premature birth. \n\nSecondly, epigenetics usually refers specifically to traits that occur due to chemical modifications of DNA that don't involve a change in the sequence, and that are heritable. I.e. epige... | null |
13l56g | how does spilled water left alone dry at room temperature? | [
{
"answer": "Water doesn't go into gaseous phase _only_ at boiling temperature. Evaporation can occur because at any given temperature, there will be _some_ water molecules with enough energy to go into gaseous phase.",
"provenance": null
},
{
"answer": "Molecules in a liquid bounce move around insi... | null |
22rjac | How were the christian kingdoms in the iberia able to beat back such a dominant muslim force ? | [
{
"answer": "Note that this isn't an answer to the whole scope of your question, but only for a certain period of the whole Reconquista.\n\nBy 1009, [Spain was divided between Al-Andalus and the christian Kingdoms (León, Pamplona, Aragón and the Coumty of Barcelona).](_URL_0_) The other half of Iberia was gover... | null |
vb532 | Hypothetically, if we could blow Venus out further from the sun, could it harbor life? | [
{
"answer": "Isnt the main problem with Venus the fact that its atmosphere is so thick and made up largely of greenhouse gases? So even if we somehow blew Venus out into the habitable zone, we would still need to introduce micro-organisms to change the composition of the atmosphere to be less toxic and to curb ... | null |
rycff | Helicobacter pylori? | [
{
"answer": "In 1989, RNA sequencing showed that it did not belong in the *Campylobacter* genus, so it was placed in its own genus, *Helicobacter*.\n\n[Source](_URL_0_)",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "58097623",
"title": "Rhodano... | null |
3dneft | Did Catholic Kings and Emperors go to confession? Do we know what they might have confessed, or if they ever had to do 'Hail Marys' as punishment, and so on? | [
{
"answer": "Medieval kings and emperors were very much obliged to go to confession and perform penance as needed. They were baptized and thus members of the Christian community bound to receive all the sacraments the laity received. They would confess to ordinary priests or bishops as they desired, though, jus... | null |
9va0f6 | Where did the traditional image of Cleopatra come from? | [
{
"answer": "Not to discourage any further answers but you'll probably enjoy these older posts by /u/cleopatra_philopater:\n\n[Most people see Cleopatra as an Egyptian, but she was actually Greek. What is her real story and how did we come to the legends about her?](_URL_1_)\n\n[Where did the popular image of C... | null |
6mvrgl | What happens to family surnames when someone horrible becomes associated with it i.e Hitler? | [
{
"answer": "Regarding the 'Hitler' last name at least, you should check out [this thread](_URL_0_).",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "18296177",
"title": "Hitler family",
"section": "",
"start_paragraph_id": 2,
... | null |
xf67q | how do they name guns and what do the numbers at the end of the names mean? | [
{
"answer": "It depends. Some examples:\n\nWinchester 94AE (rifle)\nWinchester is the manufacturer, gun design patented in 1894 ('94). AE stands for \"angle eject\", allowing the shooter to mount an optic on top of the rifle\n\nGlock 17 (pistol)\n\nNamed after Gaston Glock, designer of pistol. 17 refers to t... | null |
2rhxfp | How are we able to know of the existence of exoplanets and even categorize them as "Earth-like" when we barely have images of Pluto in our Solar System? | [
{
"answer": "Its all about light wave frequency, when the planet moves in front of a star it is orbiting the light we see reflected off the surface of the plant gives off certain frequencies, which gives us an idea of its chemical make up. Also the relative position of the plant in its given system. ",
"pro... | null |
2r1qrl | If we can only see 3 dimensions how do we know theres 10? | [
{
"answer": "A problem with this question is that it's not clear what 'dimension' means in a physical sense. If lots of people look at something unfamiliar, do you think they'll agree about whether something is a dimension? For example, do you think that electrical charge is a dimension? What about time?\n\n... | null |
e378h7 | Did Athenian males have to complete mandatory military service time? | [
{
"answer": "There are two answers to the question, depending on what you mean by \"mandatory military service time\".\n\nIf you mean to ask whether all Athenian citizens in the Classical period were liable to military service, the answer is yes. When a male Athenian citizen turned 18, they would be enrolled in... | null |
1flhjm | What did Japan know about the outside world before European contact? | [
{
"answer": "Japan became really isolationist only after European contact, and during the whole sakoku period (1633-1853), there was still contact with the Dutch, Chinese, Ryūkyū Kingdom (present day Okinawa) and Korea, so they got information on the world from several sources. Those interested in the outside ... | null |
168bcp | What has changed about the way Western parents would name their children? As we go back in time, are names given based on meaning? | [
{
"answer": "Giving names based on meaning is still very much in practices in the Middle-East and South Asia. Even when people are named after others, the meaning of the name is still known. For example: Muhammad meaning one who is praised, Khalid meaning one who has a long life, Ali meaning one who is elevated... | null |
6z1c0s | why are the recommend servings written on food so little? | [
{
"answer": "People see a small bag or box and assume it is one serving, but the manufacturer knows that if you saw the total calories/sodium/cholesterol you wouldn't eat it so they make it multiple servings so they can show you only a fraction of the total calories, etc. \n\nWhen you see this practice it is a... | null |
49dq17 | Where battles in the middle ages just as chaotic as they seem in the movies? | [
{
"answer": "See [here](_URL_0_) for a recent post of mine on this subject. The article linked ITT by /u/Silver_Agocchie is also useful, and cites extensively from Phil Sabin's \"The Face of Roman Battle\" (*Journal of Roman Studies* 90 (2000) 1-17) which is one of the most important publications shaping the mo... | null |
363z9y | how are restaurants able to keep soda carbonated and ready to serve? | [
{
"answer": "They don't. Inside the soda machine are containers of syrup and a tank of compressed CO2. The two are mixed together at the time the drink is dispensed. On a small/home scale, you can look at a SodaStream system to see how it works. ",
"provenance": null
},
{
"answer": "There are tanks ... | null |
1lh69p | If I shut a plastic bottle full of tap water, how long will it take for the water not to be safe to drink? | [
{
"answer": "Assuming the bottle of water has never been opened after factory production, bacteria are not an issue.\n\nWhen it comes to the degradation of the plastic (Polyethylene), two substances may contaminate the water. The first one is acetaldehyde, which only results in a change in taste, the second one... | null |
1gu2b4 | why are interest rates set by the fed and not the banks making the loans? | [
{
"answer": "The Fed does not set interest rates. That is done by the market itself. The Fed sets the rate for bank to bank loans that fall under Federal regulations. The Fed rate does have some effect on what banks charge in interest (especially long term and mortgage), but it is not a direct correlation.",
... | null |
1deyp4 | my rent keeps going up but my salary does not, what is the societal expectation or gain? | [
{
"answer": "It's not like someone's specifically planning for your rent to go up without your salary going up. It just happens to work out that way.",
"provenance": null
},
{
"answer": "This might happen some years.\n\nOther years, your salary might go up and the rent stay the same.\n\nBut I've not... | null |
88tnwr | Does the moon/sun's gravitational pull affect how high I can jump height on earth? | [
{
"answer": "There is a very very weak effect called the Earth Tide (similar to the more familiar water tide) which is mainly due to the moon and the sun reshaping the Earth as they orbit it and modifying its gravitational field slightly. This is a very small effect, on the order of 40 parts per billion.",
... | null |
3swiqg | Why were public executions considered entertainment in for the longest time? | [
{
"answer": "The initial reason for public executions- as well as any cruel and unusual punishment- was that it was supposed to impress upon all, especially criminals, the awful consequences of crime. Displaying the bodies, or even just heads, of convicted criminals was thought to do the same. There was also ... | null |
5o213b | what are the differences between a condo, townhouse, and apartment? | [
{
"answer": "In most of the U.S. in standard American English, an apartment means something designed for renters, while condos and townhomes are designed for homeowners.\n\nThere are exceptions - for example you can rent a condo from that unit's owner. But a large apartment complex probably has a management off... | null |
50s2le | the difference between local banks, national banks, credit unions, etc and why should i care? | [
{
"answer": "Generally, anyone can open an account at local or national banks. If you travel, it will be easier to get more cash from your accounts/find a bank/atm if they are with a larger chain. Think about it like your favorite local restaurant vs McDonalds. Both provide the same general services, but their ... | null |
o8jp4 | How are extraordinarily high temperatures contained/dissipated ? | [
{
"answer": " > How do you contain 6.6 billion degree temperatures?\n\nNot to hijack your question, but this got me thinking: is there an \"upper limit\" for temperature? ",
"provenance": null
},
{
"answer": "These things are generally confined by magnetic fields in vacuum. Heat doesn't transfer th... | null |
55cwlr | how do certain types of music sound good to some and unbearable to others? | [
{
"answer": "What you're really asking is, why is aesthetic subjective?",
"provenance": null
},
{
"answer": "Well, there's a psychological thing where the more you're exposed to something the more you like it (in general). So if you grew up listening to country, you're probably more likely to like i... | null |
ahcixb | why must my car be a "sauna" in winter, or else my windows are all fogged over with zero visibility? | [
{
"answer": "Humidity in your car will precipitate out onto your window (like dew) because the window is almost as cold as the outside. By heating up the air you increase the window temperature as well as increasing the moisture capacity of the air (hot air can contain more moisture than cold air) because the a... | null |
116jqd | how do aircraft manufacturers deliver smaller planes (that cannot fly across the ocean ) to other continents ? | [
{
"answer": "1. Ranges for passenger aircraft have large safety margins\n2. Not having cargo, passengers, or even an interior increases range\n3. Flying from Newfoundland to Iceland is about the same as flying from Denver to New York",
"provenance": null
},
{
"answer": null,
"provenance": [
... | null |
1l7n48 | If Jupiter has so much mass, why is it still a gas planet and not a solid?? | [
{
"answer": " > If Jupiter has so much mass, why is it still a gas planet and not a solid??\n\nBecause most of the material of which it is made is has low atomic mass and high vapor pressure. The rocky planets farther in (including Earth) are composed mainly of refractory elements that have higher atomic mass ... | null |
170phl | do chefs have to like the food they cook? | [
{
"answer": "They don't have to like it, but they should be able to appreciate what others like in it, so they can make cooking decisions that reflect those tastes.",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "2597318",
"title": "Culinary art... | null |
bywwrx | how is it possible that extinct species are "brought back to life"? | [
{
"answer": "Outside of science fiction movies, it isn't currently possible. Theoretically, you could use cloning methods to insert DNA from an extinct species into the egg of a existing close relative.",
"provenance": null
},
{
"answer": "Essentially, it works the same way as cloning a living anima... | null |
1n10ab | When a car (in movement) hits a stationed car (same type) face to face, will the damages on each car be different? | [
{
"answer": "I have read the replies, and I feel I should mention the car in motion will have an engine, transmission, and tires/wheels that more in motion. It might not be much different, but certainly the wheels/tires will have angular momentum much different from the stationary vehicle. The axles, camshaft, ... | null |
24q3ln | Did past (before 1800s) heads of state visit other nations, for whatever reason, like heads of state do today? | [
{
"answer": "Sigurd I, King of Norway has his journeys chronicled in the [Heimskringla](_URL_0_). While he campaigned in Palestine, he spent many years journeying to and from the Holy Land as a guest of various kings and emperors, travelling through England, Spain, Sicily, Constantinople, Bulgaria, Hungary, Pan... | null |
1j8j7n | Why did WW2 ruin the economy of the British Empire but revitalize that of the United States? | [
{
"answer": "This is an incredibly complicated question because there are so many factors involved. Even prior to American \"involvement,\" American agriculture and industry underwent rapid expansion to meet the demand of supplies to the Europeans. The Battle of the Atlantic meant that Britain could no longer r... | null |
37x5q8 | Was Alaska considered a colony by the Russians? And if so, then what did they produce/extract from there? | [
{
"answer": "**Yes. Furs.**\n\nThrough the end of the Russian era, the principal product of Russian America (Alaska) was the fur trade. Of paramount value were sea otters, and the Russian-American Company traveled across the Pacific Ocean in pursuit of these otters, ranging as far as southern California to find... | null |
b16kci | the idea of silver/gold/platinum | [
{
"answer": "Reddit gets money, poster gets a false sense of achievement, and the giver gets to feel good about themselves for spending money ",
"provenance": null
},
{
"answer": null,
"provenance": [
{
"wikipedia_id": "32878093",
"title": "Silver and Gold (Dolly Parton son... | null |
4ucwqf | why do flies gather around the eyes of cows and horses but not around human eyes? | [
{
"answer": "We have hands to rub excess mucus away and prevent buildup of globs of it in which bacteria could turn that lovely eye snot into a super cheesecake for flies. Cows and horses cannot do this so they have essentially fly dinner plates under their eyes.",
"provenance": null
},
{
"answer": ... | null |
3lbc2w | do euro countries still keep track of there old currencies? why or why not? | [
{
"answer": "what do you mean? do european countrys that are in EU and use euros as official currency keep the tract of the previous currency they used? the answer is no becouse you cant keep track of somthing that no longer exists.",
"provenance": null
},
{
"answer": "I don't know exactly what \"ke... | null |
68ntu2 | What is the prevailing opinion on "Why the West Rules... For Now" here on AskHistorians? | [
{
"answer": "[I liked it](_URL_0_). And I think you are misunderstanding his point at the last chapter, I don't remember him ever saying that in 2070 Germans will in unison cast Goethe into the fire in favor of Chinese novels. He does say that the lopsided cultural balance between West and East will start alter... | null |
7hp0oq | How do particle accelerators sync with the particles? | [
{
"answer": "The particles are often bunched before injection into a series of accelerating cavities. So you can tune the frequency of the cavity to the desired value, and have the buncher pinch off bunches of particles in synch with the RF in the cavity.\n\nThen you also have the advantage of [phase stability]... | null |
5pwpeq | why are some nfl teams generally better than others over extended periods of time? aren't new teams drafted every season? | [
{
"answer": "New players are drafted not teams. The teams with the best draft strategy over several years normally end up being better. Many players that are drafted are not as good as hoped and others are better than expected. Basically it's a crap shoot. The best teams have good front office management (draft... | null |
4ik2fq | What's the origin of Irish gypsies/ travellers and do they have any relation to Romani gypsies? | [
{
"answer": "A very good question that—would that I had a better answer for it.\n\nI have had little cause to study any theoretical ethnogenesis, unfortunately. I *can* tell you Traveller origins are not well understood, with many competing hypotheses; ranging from the pre-Celtic, to Cromwellian or Famine displ... | null |
1e1hy8 | How many mechanisms are there in the brain that induce sleepiness? | [
{
"answer": "Free adenosine's the major endogenous signalling molecule. As an organism stays awake, levels increase and this makes you sleepy. Caffiene is an antagonist at this receptor, hence why it makes you less sleepy.\n\nAmbien's an agonist at GABA, similar to benzodiazapenes and alcohol. It increases inhi... | null |
2kupzo | How do irregularities (such as sunspots) develop in the Sun? | [
{
"answer": "The cause of sun spots is due to the charged surface of the sun swirling around and allowing a magnetic field to be created similar to [eddy currents](_URL_0_). Each sun spot is produced in pairs and when these pairs come into contact with one another a process called [magnetic reconnection](_URL_2... | null |
17j43c | How was Trudeau compared to Mulroney, more beneficial to Canada? | [
{
"answer": "This seems like a very difficult question to answer, since \"beneficial\" is such a difficult to measure term. I can't really answer this question, but can you specify what you mean by \"beneficial\"?",
"provenance": null
},
{
"answer": "I believe that 100 years from now, Trudeau will b... | null |
42hprk | what is the format of the afl/nfl from the start of season to the superbowl? | [
{
"answer": "AFL isn't a thing anymore; it merged with the NFL many years ago.\n\nThere's a preseason, but results there don't affect a team's progression. The season proper starts with the \"regular season.\" Each of the 32 teams plays 16 games over a 17-week season. The teams are organized into two conference... | null |
dpriy4 | what are raw photos? | [
{
"answer": "Some cameras can give you both RAW and JPG photos. JPG photos are processed in the camera and give you a jpg file afterwards. RAW files are much larger because they contain much more data in the file which allows the user to process it themselves using a program like Photoshop to adjust things like... | null |
hs86p | What can politicians do to help scientists? | [
{
"answer": "* stop others from trying to legislate truth\n* pay school teachers more\n* fund science, basic research with minimum strings attached EXCEPT force the results to be free and accessible to everyone",
"provenance": null
},
{
"answer": "When it comes to funding science, understand that wh... | null |
1bdn5l | what is the benefit of having the large hadron collidor? | [
{
"answer": "Scientific understanding is it own benefit. Other benefits will follow once the science is better understood. \n\nNo scientist working on all the underlying physics thought about medical imaging technology at the time, but yet, x-ray, CAT Scan, PET scan, MRI, fMRI... are all the result of studying ... | null |
4dlsfx | why are the lights inside buildings, skyscrapers, etc... always on at night? are they actually used by people or is the a requirement to make the night skyline look good? | [
{
"answer": "They aren't always on. However yes many of the buildings are still used by people at night. Cleaning crews. Security. Renovations. People just working late. Etc. ",
"provenance": null
},
{
"answer": "Take a closer look at any skyline picture and you'll note that actually, nowhere near a... | null |
2jnqzb | My Great Grandfather was killed in WW1. | [
{
"answer": "I was able to find a letter he wrote, dated August 31st, 1918. I'm not an expert on battles but if it helps anyone who might be able to help there aren't that many battles after that. I don't know how long he would've lingered after being wounded but the battles leading up to November 7th with abou... | null |
97w3ws | Why does light bend when it refracts? | [
{
"answer": "Because of two things: 1) as you say, the speed of light is different in different media and thus the wavelength must be different in different media, and 2) because energy and momentum must be conserved at an interface. As a result of this conservation you cannot have any \"kinks\" in a wave, and ... | null |
1dfp58 | When we say a chemical is odorless, do we mean that it is odorless to humans, or that it is truly odorless? | [
{
"answer": "Another question. Is it true that dogs can taste pure water?",
"provenance": null
},
{
"answer": "Odor isn't an inherent property of a chemical. Talking about odor only makes sense in reference to a particular olfactory system. When we say something is odorless, what we actually mean is... | null |
f4e9u2 | why is it bad to plug extension cords into one another? like i know it’s bad, but why? | [
{
"answer": "Extension cords are designed to carry a certain amount of current over a fixed distance (length of the cord). Daisy chaining cords (plugging cords together) increases this distance and thus increases the extension cord’s resistance.\n\nWithout getting into the mathematics and physics of it, essent... | null |
8s2hi0 | Why did the Nazis devote resources to accelerating the Holocaust as they were losing the war? | [
{
"answer": "I asked a similar question awhile back: _URL_0_\n \nThe short of it is that the Holocaust is inseparable from the Nazi's larger war goals - the Holocaust was as much of a part of the Nazi war strategy as everything else was. The top comment on the linked post goes into much more detail.\n \nEDIT: O... | null |
1g15l0 | Do we have any journals from Europeans were marooned at sea during the age of exploration? | [
{
"answer": "Indeed we do, albeit the ones we do have come along towards the end of the Golden Age of Piracy. In fact, the fictional story of Robinson Crusoe is thought to be based off of the real story if Scottish buccaneer and self-inflicted castaway [Alexander Selkirk](_URL_0_). He was rescued, much like his... | null |
8768f6 | I am a high school student and I have a few questions for anyone that works in a field related to history. | [
{
"answer": "These links should not discourage further replies, but here are some recent threads, which may be of interest: \n\n_URL_0_ with answers from u/restricteddata, u/Dire88, u/alriclofgar and others \n\n_URL_4_ by u/uncovered-history and others \n\n_URL_5_ by u/itsallfolklore, u/restricteddata, u/he... | null |
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