Split (3)

train · 273k rows

title stringlengths 0 299	text list
Why are names like Aaron and Aaliyah spelled with 2 A’s? How does that double A affect the pronunciation?	[ "Traditionally Aaron is pronounced 'air-on'. It derives from the Hebrew 'Aharon'. Thus, the double a is from the loss of the 'breathy' second a. 'Aaliyah' is spelt with two as presumably to show the long a sound in the Arabic original.", "Many names or words with double letters or silent letters are just artifac...
How do game/movie studios store and archive projects?	[ "The best information we have is from games that have been discontinued and then years later there is a project to restore the development of the game or movie in order to make a new release. And the archiving process varies wildly between companies and projects. You should think that it is enough just to make a zi...
How much of a cold or flu virus do you have to be exposed to in order to catch it?	[ "In terms of \"how much of a virus do you need\" - we don't really know, in most cases. Some viruses, such as influenza or adenoviruses, only require 10 particles to cause infection. It depends on how the virus infects (it is harder to get infect through the skin than it is to be taken in as someone breathes, for e...
Why are most of the houses in US constructed of wood compared to other countries where it's concrete structure? ( Just talking about single homes and not buildings)	[ "The U.S. is heavily forested and has Canada (another forested country) as a neighbor. Wood is cheap, abundant, and can easily be molded/shaped. \nHowever, you do get more concrete structures in certain areas like hurricane/tornado zones.\n\nEdit: It's also cheaper to repair, replace, and build on to.", "In the ...
Why are people rioting in HK? What does extradition mean and how would it affect the people?	[ "An extradition agreement is a policy signed by two countries that basically declares that each country is not a legal \"safe haven\" from each other. For instance, if you're wanted in the US, and you flee to the UK, the police in the UK can arrest you and ship you back to the US to stand trial. Most extradition ...
The physics behind seeing water on the road in a distance even though it’s not there.	[ "It's because of light refracting through the heated air just above the surface of the road.\n\nRefraction causes light (as well as other things like sound and waves) to bend when they move from one material to another. The heated air is different enough from the cooler air above it (due to density and heat expa...
How does the brain understand/perceive depth?	[ "Depth perception is achievable because of our two eyes. If we had one eye, depth perception would fail. You can try it home, take a basket and a ball and throw the ball into the basket. Then close one eye and try again.\n\n\n\n\nNow the science - > our two eyes are a bit seperated and look at the 'focus' from dif...
Who reviews & approve applications updates on app/play store?	[ "A rough outline. There are a lot of factors that may change this process for different app types, companies, etc. But this should give a general idea.\n\n- The developers upload a build of the app to the developer website. \n- An automated system scans looking for viruses, obvious errors or violations to the term...
What is that "blurry effect" seen in photographs when an object like a car or a train moves quickly?	[ "There are many multiple things but the simplest way to explain it would be with exposure time. That's the time the film or light sensors collect light. Since most cameras are digital lets stick to to that.\n\nSo for however long the exposure time is the sensors collect the information that will determine the color...
Why do German cars have seatbelts in the center vs on the outside for backseats?	[ "What exactly do you mean? I'm german, if you elaborate I can maybe help you" ]
How does 'Smart Play' on Headphones work?	[ "There will be a small proximity sensor that when it detects the inside of your ear will start a command to play music, the opposite will happen when you take them out. \n\nSomeone can correct me if I am wrong but I think that's the answer." ]
Why can’t our body break down corn yet there is some sort of corn in many foods?	[ "Sweet corn and dent corn are two different species of corn. Dent corn is a hard kernel that is used only as a grain, meant to be processed before being consumed by humans (Doritos, Corn Flakes, and high fructose corn syrup). It is almost pure starch with a little fiber. Sweet corn is corn we eat as kernels of...
Why are different animals so much more sensitive to different products like chocolate or alcohol?	[ "Some animals developed as carnivores and therefore are not adapted to eating the chemicals that many plants produced, for example chocolate contains theobromine which is a plant based chemical similar to that of caffeine, however it can bind to the adenosine receptors and alter the oxygen levels and blood flow. In...
Why can't we taste while sucking?	[ "My guess is that because when you're using a straw the fluid gets directly into your throat. Your throat can't really taste something,but your tongue does." ]
Why are atoms so much "empty space"?	[ "Electrons need that amount of space to make complete waves. Think of a kid spinning in a room, of the kid doesn't have enough space he'll just keep hitting the walls and get upset. Do YOU want upset electron kids?", "Even the protons and neutrons in the nucleus are made of much smaller things still. But the way ...
Digitally transferring money (EFT)	[ "I call this badboy the background highway. \n\nSo each bank will have a clearing department that will verify the payment was made. If a bank doesn't receive confirmation then the funds will be seen as unpaid and will remain as such until you compete a trace or recall from the bank where the money was being sent fr...
what is torque? I read definitions and people tel me what it is but I still don’t get it	[ "Any twisting force. When you use force to twist open a bottle or a jar, that is torque. If the jar is stuck and you have to try really hard, that is a lot of torque. If it loose and slides easily, that is only a little bit of torque. Torque is often used to describe cars. It is the same kind of twisting force. It ...
Why do radios go static when you take your hand away from them?	[ "If your talking about old radios it would probably be something along the lines of you found the signal and when you took your hand away it changed the wavelength because it wasn’t passing through your hand maybe 🤷‍♂️\n\nIf it’s happening with anything newer and like 20 yr old it’s just broken" ]
Witness Protection	[ "Witness protection is a service to protect people who testify at great personal risk to themselves, such as against a mob boss with far reaching connections. The US Marshals Service heads it up and would relocate you and give you a new identity (license, SSN, etc).\n\nA vast majority of the people in the program a...
How can glass break just like that?	[ "That's probably tempered glass, which means that it has a lot of internal stresses which \"pull\" it together strongly. That makes it more durable, but if it breaks, the stresses are released at once and it shatters entirely rather than just cracking like normal glass.\n\nI assume that the countertop had been nick...
How do archeologists know where to dig?	[ "Not sure why this is biology, but I can answer the question.\n\nIn traditional, old school archeology, they don't really know where to dig. \n\nBasically it works like this:\n\n1. Archeologist comes up with a theory. Let's say they think a particular society was, say, undergoing the process of urbanization at a ...
How can terms of services apply to teenagers when they are underage yet still old enough to use social media platforms?	[ "A term of service isn't a contract. It's just an agreement and one whose primarily function is to absolve platforms of responsibility. So if you go on their platform and violate their terms of service and do something illegal, they can point to it and say, \"They knew they weren't supposed to do that, we do did *o...
Why is the North Pole considered the top of the world and the South Pole considered the bottom?	[ "Top and bottom are relative. Consider where the most powerful empires are and have been, and where most of the people live and have lived, and that people tend to want to be ‘above’ rather than ‘below’, then you get the orientation we are used to: North as ‘top’ and South as ‘bottom’. But there is no ‘real’ top or...
what makes foamy water white?	[ "The white just means light is being scattered in all different directions. Foamy water = lots of bubbles which make the light scatter. Similar to why snow is also white, or ground up glass vs a window, etc..", "It's white in the same way as snow is \"white\". It doesn't have any actual pigment in it but all th...
Explain how radios work	[ "There are three radio systems: AM, FM, and Digital. They work differently, in detail, but they have a few common characteristics. For example, let's discuss AM.\n\nAn AM station might transmits with a channel assigned at 1MHz. The ITU regulates radio frequency assignments world wide, through the FCC in the US, ...
What exactly happens when old elastic gets crusty and loose ?	[ "This is a chemical process. To understand it you have to first understand a bit about the chemical structures that makes elastic stretchy.\n\nAll polymer plastics consist of long molecule chains. Think really really long pieces of string that get all tangled up with each other. The way they get tangled depends on ...
Why can youtubers like ScottTheWoz use music that is licensed in their outros?	[ "Found another more precise answer\n\nNowadays, most professional composers resort to AdRev or similar services to protect their copyright. Don’t let this discourage you. AdRev system allows the composers to easily clear the claims and even to whitelist entire YouTube channels to prevent any future claims\n\nSource...
Why does being in the sun drain your energy?	[ "The body needs to hold his temperature at round about 36°C.\nSo if you heat up due to beeing in the sun, the body needs energy to get the heat out. (Just like a fridge which need energy in form of electricity to transfer heat to the outside)" ]
; To whom or "what" does the world owe it's international debt, and what happens if we don't pay it off?	[ "* Countries owe each other money. \n* If country A doesn't pay country B, then it's really up to country B to decide how to respond.\n* They might:\n * Go to war.\n * Apply economic sanctions.\n * Prevent travel to/from country A.\n * Complain to country C.\n * An unlimited number of other things.", "A...
How come so many crimes in the US carry draconian jail sentences OR laughable fines at the same time?	[ "I don't think what you've stated is quite accurate.\n\nWhat you'll actually see in sentencing guidelines, in my experience, is \"up to X years in prison AND up to $X,XXX fine.\" The distinction between and and or is important because the sentence is actually any combination of those things, depending on the f...
Why in nature are animals almost uniformly symmetrical, but people are very often not symmetrical?	[ "Animals are often assymetrical. You don't pick up on it as often, mainly because you are not familiar enough to spot the imperfections. Humans are around other humans so much, and have evolved to interpret their facial expressions and moods that they are really really great at spotting when something is not the wa...
Why does the human body experience heat at temperatures lower than it's own?	[ "Because the body is trying to maintain an even temperature which means in high temperatures it becomes increasingly difficult to shed excess heat created by the human body.", "Don't think of heat as a \"setting\" it is a constant flow (or flux as we call it in heat transfer) of energy. HEAT is a byproduct of sto...
Why Isn't the Milk Way expanding as fast as the rest of the universe? Or Is it?	[ "Eli5: Expansion can be thought of as caused by a weak force gently pulling things apart. Gravity is a force that pulls objects together.\n\nGravity gets weaker as you head away from the mass creating it. Expansion gets stronger as you put more distance between you and another point.\n\nWhere gravity is really we...
Why do downloads in some websites start "in a couple of seconds"?	[ "Usually it's so they can control the flow of traffic to and from their server so the site doesn't crash from too many connections at the same time.", "Generally landing pages like that either have some other kind of information on them, or they have ads on them. Impressions on the ads matter for these sites for...
How does hair dye and hair bleach work. Why does one wash off after some time and the other is permanent?	[ "Bleach oxidizes the melanin molecule - it actually bleaches the color that is inside of the hair strand it self. The peroxide opens the cuticle and allows the bleach to enter the inner parts of the hair strand, and this reaction takes place.\n\nWith other types: semi and Demi permanent color, depending on the type...
What does a good economy mean for an average person?	[ "Good economy means more tax income, more tax income means better infrastructure, better government services like education, healthcare or welfare programs. Better infrastrucutre and services leads in turn to even better economy. More taxes also means than tax rate can be lowered without hurting infrastructure and ...
How are calories of food measured? Is it true to how much calories our body uses when consuming a food?	[ "A calorie is the amount of energy required to heat 1 gram of water 1 degree C. A Calorie (food calorie or kcal) is 1000 calories. \n\nTo measure the calories in a certain food, a scientific experiment is performed such as burning the food and measuring how much a certain amount of water is heated up." ]
What does it mean to declare money an the airport?	[ "[You're supposed to declare that you're transporting it.](_URL_0_)\n\nWhy would you even want to though? Why not just do the bank account thing and not worry about the possibility of all that cash going missing somewhere?", "> What does it entail and how does one declare your money?\n\n[There is a form for doin...
Why do high serotonin levels lead to a lower sexual drive?	[ "Sex produces serotonin among other things. Ergo more serotonin leads to more contentedness resulting in less desire for sex as a means to boost serotonin." ]
How do HIPAA laws work when a person turns 18 in the context of medical care and insurance?	[ "Keep in mind I'm not at all a lawyer, but an adult who has recently had to learn to navigate healthcare on my own.\n\n & #x200B;\n\nAs an adult for these purposes, HIPAA now gives you the right to decide who gets access to your medical information outside of your care team. You could, for example, ask to speak to ...
How does bug spray work?	[ "There are at least two different types of bug sprays:\n\nRepellents: These work by keeping bugs away. Typically they use a smell that bugs really dislike. Others, such as DEET, which repels primarily Mosquitoes (But also repels other biting insects), will block the receptors that Mosquitoes use to track down their...
how do big shipping companies like Amazon guaranteed one and two day shipping while remaining efficient?	[ "From what I know from where I work, the business puts a certain amount of product in an amazon distribution centre so they are ready to be shipped upon ordering. We get notices that our inventory are getting low at amazon and we have to send more to the distribution centre.", "Efficient isnt the issue here. Th...
Why does nearsightedness still exist while looking in a mirror? Why do distant object still appear blurry, when all the reflected light from the mirror remains at the same distance?	[ "It's not the same distance though. The reflected light had to travel from the distant object, to the mirror, then back into the eyes. Thus to focus on something in a mirror, you have to adjust your eyes for the total distance traveled.\n\nThis differs from a painting, in that with the painting, the object you're f...
what does the -RW or R or +RW mean in the empty discs For example dvd-R	[ "Read or Read Write. Disks that are read only cannot be rewritten to, but Read Write ones can be reused even after burning to the first time. \n\n(Not sure on the + vs - though, so I won’t pretend to know about that off the top of my head.)" ]
what are the grey areas that we can see in the moon from down here?	[ "They're called mares. It means \"sea,\" but these are actually more like patches of the surface that had melted and re-hardened in the distant past.", "They're called maria. They're large, flat basaltic lava planes from from when the moon was geologically active and had volcanoes." ]
How do people like firefighters/exterminators determine the “origin” of a fire/infestation?	[ "Firefighter since 2008 here.\n\nMost places don't burn to the ground with nothing but ashes left.\n\nFinding the origin consists of viewing how far along things burn and understanding a fires normal path. Fire burns up and out, with a goal of getting more air to feed itself. In this way there is often a V where th...
How can anime be produced on a weekly basis?	[ "They work on multiple episodes at the same time, and the they work probably at least 50 hours a week to meet the dead line, and sometimes they don't, so the episode will take a dive in quality.\n\nEdit: to the pay question, animators get paid like garbage. Also for other shows like dr.stone, that was in production...
What are the technological and economic implications of T-Mobile—Sprint merger?	[ "Technological- T-Mobile will gain a lot of “midband” spectrum— airwaves that carry data not as far but can carry a ton of it. This will allow them to bolster their LTE network and build a relatively high capacity 5G network with ease.\n\nEconomical- 4 carriers down to 3 is bound to increase prices for customers in...
What is the difference between a directory and a database?	[ "Do you mean \"directory\" or \"repository\"?\n\nA \"directory\" is basically a Windows folder. It's part of a filename, and it's used to group related files together.\n\nA \"database\" is an actual file, which contains data organized in a structured way.\n\nA \"repository\" is a Git term; a Git repository is basic...
What purpose do continents serve apart from broad classification?	[ "There is not one but a few different models for the continets. Some of them are just for classification. Some are used to differentiate what is one landmass and what is another. I thing the most common models used are the geopolitical and historic political one. These differentiate between what you could roughly ...
what kind of effect would forgiving everyone’s student debt have on the economy	[ "Easiest way to describe it is this.\n\nThink of all the money that people are spending per month on their student loans. Many are spending hundreds per month to pay off their loans. \n\nAll those debts disapearing would be a big boost to the economy. People that are paying off their student loans are generally you...
What is the “mirror universe”, how Leah Broussard and her team trying to prove its existence/absence?	[ "And another good question that I have asked in the past, that has since gone unanswered: Is there some reason to suspect that this \"mirror universe\" is fundamentally different to the CPT-inversion, or is it that the mirror universe is another fancy name for the CPT-inversion?" ]
Does dyslexia only effect reading and writing, or visual input in general? Either way, how?	[ "For me it does different things. It's not just reading or writing, because I find it difficult to read I require a good memory when things are explained. Because of this I can imagine and almost design something in my head with a CAD like 360° view. Not sure if everyone is the same\n\nHere's the different types \n...
Radioactive half life.	[ "It is probabilistic. So if an atom has a half life of 1 second, this does not mean that in 1 second that atom will now be a half atom. Instead, it means that on average, that atom will decay within its 1s half life 50% of the time." ]
why are clouds substantially more flat on the bottom?	[ "As warm air rises, the water vapour remains invisible until the air cools enough for it to condense into water droplets. The altitude where that happens marks the bottom of thecloud." ]
Why do strongmen have more body fat & smaller muscles than bodybuilders but can lift heavier?	[ "Power lifters focus on functional movements- the actual motions used to lift, push, and pull heavy items- to maximize the performance of the relevant muscles. Body builders focus on maximizing the size/appearance of many muscles that are superficially visible, but may not be relevant to the functional motion of li...
How do baby animals developing in eggs eat/drink with nothing to eat/drink?	[ "In eggs the baby uses the yolk for nutrients. In placental animals the mother provides nutrition through the umbilical cord." ]
Repeatedly plucked hairs keep growing, and often get stronger/thicker, instead of going away. What is the mechanism behind this? How does the body not 'get the message' and learn to stop growing them?	[ "Plucked hairs dont get thicker, its just that the tip of the hair is now blunt from being cut that it appears thicker.\n\nAnd no, the root is embedded in the skin." ]
why aren’t all rivers like the Grand Canyon?	[ "First off, it's the Colorado River. But yeah, it's like that because there's so much water and it flows so quickly. It was flowing fast in the same place for a very long time, and the ground underneath is very carveable. Other rivers are either closer to the sea and spread out (so they aren't concentrated enough t...
What physically happens to the body when bungee jumping?	[ "It falls down. Then it goes up. Then it falls down. Then it goes up. Then it falls down. Then it goes up. Then it falls down. Then it goes up. Then it falls down. Then it goes up. Then it falls down. Then it goes up. Then it falls down. Then it stops." ]
What are the real ways to save the environment?	[ "Don't have a pet which eats large amounts of meat in its diet, reduce your meat consumption, reduce your car mileage and airmiles; are steps you can make on a personal level to be more green.", "have less kids. if you were to have one fewer kid than expected, you can about 50 metric tons of carbon a year. its al...
Beyond Meats Market Cap is 25% of the S & P.	[ "Market cap, short for market capitalization is the total value of the company, based on what people are willing to pay for the shares. To put it another way, it’s the price of a share multiplied by the total number of shares that exist in the company. \n\nThe S & P is a list of 500 really large companies. \n\nTake...
Why is it that sometimes we see the sun with rays shooting out of it, and other times we see just the orb-form of the sun?	[ "It's our atmosphere. Here is my favorite [effect](_URL_0_). Light reflects of water and other particles depending on density and angle.", "If you're referring to sunshafts, these come from gaps in clouds causing certain parts of the sky to have sunlight and other parts not to. Sunlight is really bright, and the ...
Why does the sun become easier to look at when its setting?	[ "The simple answer is that it's not as bright when it's about to set and especially while it's setting. The reason it's not as bright is that the light from the sun is going through more of the Earth's atmosphere and so more of the light is being scattered by the air." ]
Did our ancestors experience vision loss similar to how we do? If so, how common was it and how did it affect their day-to-day survival?	[ "Nearsightedness is largely a disease of urbanization and industrialization. populations like the Inuit went from like 0% nearsighted to like 50% nearsightedness in one generation due to urbanization. So our ancestors likely did not have that vision issue. But presbyopia, which is difficulty seeing near, starts aro...
How come a nearsighted person can see clearer when they squint?	[ "Myopia is caused by an elongated eyeball or an over-curved cornea or lens. Basically, the geometry of the lens in relation to the retina is wrong.\n\nSquinting can alter this geometry, \"squishing\" the cornea and lens into a shape that better focuses the incoming light on the retina." ]
How do animals have a natural instinct?	[ "Your thoughts and behaviors come from the patterns of neurons in your brain, like a very very complicated series of if/then triggers: IF you are hungry and IF you see bread and IF you smell bread THEN you should pick up the bread and eat it.\n\nThis happens as neurons fire and trigger neighboring neurons in uniq...
how WhatsApp prevents spammers from using the app	[ "Their main tactic is really just making it difficult to sign up for a WhatsApp account.\n\nTo sign up for WhatsApp, you need to put in a real cellphone number. They have a way of telling a real phone number from a \"virtual\" one (using VoIP), and block any attempts to sign up with one. By doing this the barrier t...
why is it that our hands feel the cold faster than the rest of our body?	[ "The body works hard all the time to keep your body at the right temperature. Most important to keep warm is the core of your body—internal organs and brains. If you’re in a situation where it’s cold and your body starts to get cold, it will constrict the blood vessels at your extremities—hands and feet, arms and l...
how are tasting notes manipulated?	[ "Basically it's all manipulated by adding stuff. For wine/whiskey/beer etc the ingredients used from the amount and type of sugar, type of grapes, hops, barley, acids, artificial flavorings, etc. How long it aged in casks, type of wood, etc. \n\nBlack coffee is an exception, it's the most complex beverage. No o...
How is water consumed differently to food?	[ "Water is absorbed by the small intestine, and the water inside what you eat gets also absorbed there. Then, the solid matter goes through your large intestine, where the proteins, vitamins and minerals are absorbed." ]
Why did my head hurt like hell after blowing my nose while holding it closed on a plane.	[ "Usually this happens when your sinuses are blocked in some way. As you ascend, the air pressure decreases in your sinuses. When you start to come back down, it starts to rise and gets trapped in your sinuses causing pressure and eye watering \"omg am I having a stroke\" levels of pain. \nYou can avoid this by usin...
Stocks	[ "Say there are 100 stocks in Apple. If you buy one, you own 1% of the company. Then say Apple makes a new iPhone that is insanely popular. They double their profit this year. That means the company is worth twice as much as when you bought it. It also means that 1% of the company is worth twice as much as when you ...
When driving a car with an open window at certain speed, why there's a noisy sound in the ear like pulsating or drum ?	[ "If you take a bottle of water, remove the cap, and then tip it upside down the water will flow out in a gurgle. Every so often the flow will stop and air will get sucked up into the bottle, then the water flows again. This happens because of pressure inside the bottle versus outside.\n\nIf you poke a hole in the u...
FAT32, exFAT, and NTFS: what’s the difference, why does it matter, and why does the size of the drive limit formatting choices?	[ "Tl;Dr: they are the same but allow slightly different maximum sizes for hard drive partitions.\n\nFull spiel: all memory is kept in paired bits of hexadecimal code. This code is the arranged into a grid, or table. A part of this table is the address table/lookup table (there are a few other names for this table to...
Why are the principles behind dieting such a mystery?	[ "They aren't. It's literally math.\n\nIf you burn more calories than you consume, you lose weight, regardless of the composition of your diet, period. It's been proven repeatedly and is an extremely basic concept.\n\n(ex., [_URL_0_](_URL_0_))\n\nThe only \"mystery\" is that TDEE differs from person-to-person. If yo...
Why can my brain recognise four objects without counting, whereas if there are five objects, I have to split them into a three and a two?	[ "This is called \"subitizing\" and is actually really cool. Basically, they're two different processes. Counting is a very manual deliberate and conscious process. Subitizing is based on your brain's object tracking systems--how many moving objects you can keep track of at once. Even if the objects aren't moving, y...
How do stabilisers work?	[ "There is a small sensor built into the device that detects movement - similar to the one on your phone that detects tilt.\n\nThe system is then setup so that when the sensor detects some movement, the motors offset it by moving in the opposite way.\n\nObviously there is a limit to this, as the motors can only move...
how does hacking work?	[ "It depends what you mean by hacking. But there are various ways that someone can do it. For example, it's very easy to send an email which appears to come from, well, whoever you want. So I could send you (and millions of other people, cos I buy a list of email addresses) an email which appears to come from Ama...
When we listen to a song for the very first time. Some of them sounds wicked and eventually you get sick of it in no time. But some of them are not great at first, but it will grow on you and you enjoy them for longer periods?	[ "Simple songs, with basic, repetitive passages are very easy to listen to - without any preparation you can easily pick out the full compliment of instruments and follow along. So a song immediately sounds good and exciting.\nThe problem is that such a song is pretty simple, so once you have listened to it a few ti...
What is the difference between state and province ?	[ "A federated state and a province are interchangeable terms. They have more specific names in some places, e.g. oblasts, emirates, etc. In much of the world the term state is usually used to refer to sovereign states unless directly talking about the US.", "There isn't really a set answer. Every country gives di...
How is community college different from normal college? Like... did the community pool money together to build that college or something? Sorry, I am not American.	[ "They're 2 yr colleges and you either get an Associates degree and transfer or stop after that or skip that degree and transfer to a state college or university. You can also go for certain certificates. \n\n\nThey get more government funding than other schools so tuition is a fraction of what it can be vs. a 4 y...
What is the difference between normal light and lasers?	[ "Lasers are produced by exciting atoms or molecules and stimulating them to produce light. The major difference between normal light sources and lasers is coherence. Which is essentially how similar two waves are.\n\nWaves have two properties that are important here, the wavelength (colour of light ) and the phase ...
Why do smartphone manufacturers make telephoto lens but put less megapixels?	[ "A traditional physical zoom actually does refocus the camera lens and it makes the same quality picture regardless if you are at 1x or 4x zoom.\n\nDigital zoom is not actual zoom. It basically just crops the picture you have and zooms in on it like you can do with MS Paint. \n\nSo the more you zoom in digitally,...
Why is it harder to learn things as an old person?	[ "you know what, it really isn’t. I’m getting close to 50 and in the last couple of years i’ve taught myself fairly passable German from the Internet, I’ve recently learned how to sail and repair a sailboat, i learned how to rebuild my car’s brakes, and also how to fix many parts of a specific type of vintage watch....
What is the difference between adrenaline and noradrenaline?	[ "Two different neurotransmitters which signal in different way. Noradrenaline doesn’t have a direct action on the heart. Instead it increases vascular tone. Also, adrenaline has a methyl group on it!" ]
Why can we sometimes feel our pulse in parts of our body and other times not?	[ "Now if you can hear your pulse in your ear, mention that to your doctor. It's not typically worth an appointment on its own, but they'll want to know." ]
why a BIOS update is so much slower than copying a 16MB file	[ "The bios isn't just stored on disk. It's stored in a special kind of memory that retains its data even when the power goes off. This memory requires special instructions to update, and it's usually updated one word at a time, rather than in blocks via direct memory controllers.\n\nSince the operation isn't \"und...
I just learned that having 6 fingers is the dominant trait and having 5 fingers is recessive. If that’s so, why don’t more humans have 6 fingers rather than 5?	[ "Dominant trait doesn't mean common. It just means that it tends to express itself whenever it is present.\n\nOn an anthropological level, if 6-fingered people were more highly preferred that 5-fingered ones, then the vast majority of the population would have it, but apparently humanity didn't find it a desirable ...
why is the color green the only one that is used to edit backgrounds/things in movies? Why can't other colors be used?	[ "When more movies were shot on film, they used to use blue more commonly. This process is called \"keying\" and it involved a chemical treatment to the film to remove that specific color.\n\nThe green you see today is called \"Digi Green\", and it's color matched to the small green filters inside camera sensors to...
What exactly is sedition?	[ "It is actions that openly go against the crown/state, similar but not quite the same as to what would be considered treasonous." ]
How does the police obtain the position of a call without the phone having location turned on?	[ "They use the signal strength of your phone between multiple phone masts and that helps them narrow bit down. Its also instant you don't need to keep someone on then line", "Every phone pings to it's nearest tower while on call, they'll select 3 towers in shape of triangle , by using mathematical formula they'll...
National debt	[ "National debt is just like any other debt. When you want to spend more money than you have, you borrow it. Same goes for governments.\n\nWhy do investors/banks want to lend you money? Because they think you will pay the money back with interest. The more likely you are to pay, = the safer the debt, the lower t...
how are aromas created based on flavours we already created, such as “tiramisu flavour” without any of the real ingredients in it?	[ "Chemical engineering. First they figure out which chemical(s) in the thing contribute to the flavour/aroma, then they synthesize those same chemicals in a lab from other materials. Voila" ]
How do doctors reattache ripped parts of the body?	[ "Microsurgery, using a microscope and very thin stitch material." ]
The positive and/or negative effects of popping the neck long term	[ "Nothing happens. It is simply gas escaping from your joints. A man cracked his joints for 50 years and nothing happened." ]
Is the East Australian Current depiction in "Finding Nemo" film close to reality?	[ "It’s the general idea, but much weaker, bigger, and less obvious, but the general idea of a current underwater is correct." ]
How does a lightning 'find' the nearest spot on the ground?	[ "Before you see the bolt strike, smaller \"feeder\" lines are either working up from the ground, or down from above. The first of these lines to reach a path to the ground becomes the basis for the bolt. \n\nYou can see it here: \n\n_URL_0_", "It doesn't always go for the nearest spot. It randomly jumps around th...
Where does the stereotypical image of an alien come from	[ "In 1893, science fiction author H.G. Wells wrote \"Man of the Year Million\", where described humans becoming the stereotypical \"grey alien\". In 1901 he reused this description in First_Men_in_the_Moon. It's also the general description of the Martian evildoers in The_War_of_the_Worlds.\n\nWells was so popular...
The gut microbiome and how dehydration affects it	[ "To address the first half of your question: The gut microbiome describes the plethora of bacteria that live in your gut but do not harm you. In fact, many of them help you! (For example, you get almost all of your Vitamin K because bacteria in your gut produce it for you) The microbiome also helps prevent nasty bu...

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