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It's not instinctive, it's learned. We all stared as kids, all got told not to stare repeatedly. Now we're adults, we know we can get away with it, right up until they notice. It's a natural response that has been well documented in this [Wikipedia]( URL_0 ) article Primates use staring at another primate as a signal o... |
A given regular language can be represented as a finite state machine. This machine will only have so many states. However, you can have words in this language that are longer than the number of states. When that's the case, there *must* be a section of the FSM that is repeated. And if a section is repeated once, it ca... |
It takes more and more energy to constantly accelerate a spacecraft. This means that as you approach C the amount of energy that you need to go faster approaches infinity. Sadly humans do not have access to infinite energy so we can never actually reach C. Because of relativity, from your point of view on the ship it m... |
Pty = Proprietary = shares are privately held, not publicly traded. Ltd = Limited Liability = the shareholders are not personally liable for the company's finances. The general term for this is [private limited company] ( URL_0 ). In the USA the closest match would be a LLC. |
You have muscles that pull in opposite directions so you can move your limbs in both directions. When you hold your foot at the balance point between two opposite muscle groups it shakes because both side are pulling equally. Like a really quick tug-of-war with part of your leg. |
Two Words: Confirmation Bias. Basically: When you hear a song and you can't quite catch the lyrics, your brain doesn't know what to listen for, so it can't easily distinguish lyrics; especially if the song is badly mixed (the vocals are too quiet relative to the instruments), or just a background noise. However, once y... |
There is a reason. Specifically the grammar of PIE (the earliest ancestor language of modern English that we have a fair working knowledge of) marked interrogatives (words like who, what, when etc) with a prefix that sounded like 'kw'. (I'm no linguist, but I suppose this is kind of like the way English marks questions... |
When you have an open wound, the response is to inflame the area, which means to increase blood flow and heat it up to prevent bacterial growth. The signal we use (inflammatory cytokines) to do this is the same as the signal that we use when parasites latch onto us, so it comes with itching to scratch the non-existent ... |
The short answer is that your cells are "talking" to each other. Your cells communicate with each other in a number of ways including endocrine and paracrine signals, but thinking and acting are really easy ones to talk about because this just relies on your brain. Your brain is made up of a bunch of nerve cells or neu... |
It shouldn't. There is no economic reason to be investing in coal at this point, as coal is more expensive, more dangerous, more damaging to the environment (and thus to your taxpayers), and less efficient, than more modern forms of energy production. The reason Trump wants to invest in this outmoded technology is beca... |
If they have FTL travel without timey-wimey effects, they'd probably use the standard time on the home planet. If multi-racial, they would probably decide which species' system is used through war or diplomacy. If their FTL travel DOES come with time dilation, then they would probably not be traveling to and from frequ... |
A common strategy is to fire the beam through the body at differing angles, centered upon the tumor. That way, while the radiation is certainly not good for healthy cells, any one 'path' of healthy cells gets a much more limited dosage than do the tumor cells themselves. Radiation breaks DNA. Cells have the means to fi... |
The truth is, no one truly knows why we need sleep; we just know that we do. While we understand that we *must* sleep, and we understand at least some of the role sleep plays, medical science still hasn't been able to nail down the why of it all. The biggest hurdle to understanding why we sleep has been that the brain ... |
The planets are 39 light years away, so getting a probe or something over there would take quite hundreds of years or more with our current tech at it's best. Fortunately, we don't have to do that. The best thing we can do is to look for signs of the kinds of gases life makes: oxygen, carbon dioxide, methane. When Trap... |
If you are a genius, you have a clear reason to be confident: you are smarter than most of the people around you. If you are genius, you have a clear reason to be reclusive: the people around you are probably rather boring compared to your own ideas, and don't even understand what you're talking about much of the time.... |
There are two(ish) main types of captcha: 1) Computer generated word images. In this case, it's obvious why the computer can know if you've typed it in correctly. 2) Not computer generated captcha. This is the kind that comes with two word-images. Only one of these words is actually the human test. The other one is the... |
They can. May not be worthwhile, though, as from what I recall the system is pretty young (possibly less than a billion years old). We can also send a signal at them directly, although it'd take 40 years for the signal to reach them, and another 40 years for their response (if any) to get back. Interestingly enough, on... |
A mirror doesn't reflect only those things directly in front of it. You're seeing your shoes because of the angle you're looking into the mirror. Think like your eyes are taking a banking billiards shot against the mirror and your shoes are the corner pocket. |
Physically, male humans develop slower because they are larger and more massive (mass wise) than females. Growing takes time, and growing too fast isn't good for the body. Emotionally/intellectually this is more challenging. But it is a fact that women(girls) mature faster than men. Girls learn to "prune" information a... |
I went from 160 to 215 last summer when I worked the pasture at my grandparents house. My grandma fed me too well (first world problems, amiright) and now I have stretch marks everywhere. I would love to know how to get rid of them and keep away excess skin while losing weight. Can't speak for what happens to the cells... |
The simple answer is yes. Modern bombs run on fusion energy, but the principle of converting rest mass into energy remains the same. Other bomb methods are converting chemical bond energy into energy, and on the scale of nuclear physics chemical bonds are weak. Really weak. How powerful? Well a modern hydrogen nuke giv... |
Toddlers fall over a lot. Having the hands closer to the face puts them in a good position to catch their relatively massive head. |
Only a guess but i know Denmark from a lot of visits. In the rural areas you often see massive Pig Farms. 1) Geographically very flat, lots of farmland 2) Pretty stable weather, not too hot in the summer and not too cold in the Winter 3) Property value in central Denmark is quite low so big industrial farming is possib... |
They probably used something like ricin, a biologically-generated poison kind of like boccilism... Even a tiny amount ingested will kill you, and an even tinier amount inhaled will kill you. The woman had it in a plastic bag or something and smeared it into his face, so he inhaled it. She then washed her hands so she w... |
You got it right. 7 planets roughly Earth-sized (+ or - about 25%), 3 of them in what they think would be the habitable zone for life like we have on Earth. The star is an ultra-cool red dwarf, which is about 8-11% the size of our Sun, and has a surface temperature about 41% that of the Sun. Because of how close they a... |
Firstly, keep in mind that as humans, we learn from experience, and we must remember our experiences to retain this. Very negative experiences or anything else that will cause a significant emotional reaction (e.g. bad news) is something we, as humans, evolved to remember very well. The emotional network of the brain a... |
Anonymity is a very powerful promoter of bad behavior, but it is not the only one. Two things that help promote good behavior is consequences and our natural empathy. On facebook there are somewhat limited consequences, especially when interacting with strangers. Tom Jones from Hawaii may be able to see that you are Ci... |
A strait is a narrow connection, usually between two "distinct" bodies of water. For example, the Strait of Gibraltar connects the Mediterranean Sea with the Atlantic. A channel is usually much wider, and is usually defined as a body of water in and of itself. Often, the two bodies of water it connects are not consider... |
I grew up very sheltered due to poverty, religion and remote location. I maintain a childlike curiosity because there are legitimately a lot of things in this world I have not seen and/or experienced- The latest fascinations have been with pneumatic tubes at the bank, hummus and air conditioning. |
On a mobile, so I apologize if this is choppy. This does happen in arid climates like the Southwest more than you might think. There are special native frogs and toads (like the New Mexico Spadefoot) that will sit underground for a long time, sometimes years*, until a heavy rain hits the area. They can stay underground... |
Short answer: money. It takes $10,000 to send 1lb of stuff to space. ISS weighs 925,000 lb and it only serves research purposes. If you would like to perform any kind of manufacturing or processing and house a reasonable amount of people (ISS currently houses 6) you can easily multiply that by 100x. And already we're g... |
Oh, something I can answer. The process you observed ("consolidation") happens in many mature industries. When an industry is new and growing, many different firms are founded and develop to exploit a new market, and new product or a new technology. Inevitably, the number of firms decreases through mergers, acquisition... |
Are we? Lots of animals communicate, build tools and domiciles and even exhibit self awareness when presented with a mirror. It's because we haven't figured out a way to communicate our higher thoughts with them, doesn't mean the don't have them... URL_0 |
You very nearly can just plug an antenna into a speaker and catch a frequency. What you're describing is a 'crystal set' and operates purely on the radio waves without the need for it's own power source. Crystal sets were popular in the 'olden days' as kits for children/introducing people to electronics. In addition to... |
Humans have selectively bred a small number of species to help provide better for human needs at the expense of the animals natural survival. Sheep are one of those species. Prior to domestication sheep would have grown a much smaller amount of wool up to the point where it served their needs, like the hair on a bear o... |
Who made it? A huge team of NASA engineers working for years and years to develop technology never seen before. These are real smart dudes who don't work for chump change. |
ELI5 Quick n' Dirty Overview on Formulation Chemistry We've got a bottle of Type A Goo. We've got a bottle of Type B Goo. We want to make a product that contains A and B because the consumers find it convenient. Both A and B turn out to be soluble in water. Unfortunately, when *both* A and B get into the same water, yo... |
If they detect certain gases in significant amounts (specifically methane and oxygen) this would be **very** suggestive of organic chemistry. These gases don't tend to stick around before turning into something else so their presence would suggest an active process that is creating them. There are some non-organic proc... |
The shape of the ears is probably important in allowing us to perceive the direction of a sound. We don't hear a sound until it arrives at the eardrum. To get there, it has to bounce around the folds in our ears and down the ear hole. High frequency (higher pitch) sounds, including things like s, t, k etc in speech, bo... |
It wouldn't. Even if we decided 40 light years was am acceptable distance for humans to attempt to colonize. Current spacecraft can travel 17,500mph, the light travels 671 000 000mph. This means that it wouldn't take us 40 years to reach the planet, it would take us 1 533 714.2857 years. Longer than homo sapiens have e... |
Fasting before the blood test is necessary so they do them in the mornings as you aren't eating at night and don't have to fast during the day. I have about as much knowledge on this as the average Joe but I'm assuming this is the reason Those tests are based on your personal clock. Tests right after you wake up(fastin... |
Communication would be limited to 40 year lag. Speed of light is an absolute max speed given our current understanding of science. Some people think that doing really tricky things with entangled particles could allow for faster than light communication. You can put information "in" to entangled particles and this chan... |
I do this thing where i say "what" as if i can't hear what someone had said but then a few seconds after i realise what they've said and laugh. One day someone asked me why i always did that and i explained truthfully. The person then responded saying "ohhhh you're just slow" i guess you can be physically slow in speed... |
To tackle this question, let's assume that light isn't the universal speed limit. (The speed limit being infinite). #We Know: It takes an exponentially increasing amount of energy to accelerate an object of mass x. Think of this as a 100m long ramp that grows steeper (as a function of mass) until it's completely vertic... |
E = mc^2 is only a shortened version of the full equation. The full equation is E^2 = m^2 c^4 + p^2 c^2, where m is the rest mass of the particle. A photon, by definition, **has no rest mass** i.e. m = 0. So it's equation for energy is E = pc. This means that higher energy photons have more momentum. Note that in relat... |
The server that the website is hosted on is bombarded with too many requests at the same time for that website. A great analogy for this is a mail room. A mail works fine when there aren't that many people sending mail. But when lots of people try to send their mail at the same time, the whole system begins to slow dow... |
Chinese government actually subsidy cost of shipping to support exporters, so that's why they can send you item you bought for 0.1$ with free shipping. Longer explanation would be that they ship in bulk with pay per volume and not per item, so they don't care it's actually one small item for one customer, but anyway it... |
It's not an act of war if a private citizen kill another private citizen, regardless of where. It is a crime, and the criminal will be tried where they were at the time of doing it, regardless of the victim being over the border. The definition of "murder" in the USA requires no reference to the location of the victim.... |
In fact most drinks are about as hydrating as water. But some drinks contain a *diuretic* ingredient -- something that causes your body to throw out a bit of water -- such as caffeine. So these are not quite as effective, though (contrary to myth) they still hydrate you. Some contain caffeine which is a diuretic, makes... |
Software developer here, I wrote Class III casino slot machine software for 5 years. These machines are, by law and by definition, truly random. They use a hardware random number generator (RNG) to produce values that determine the outcome. The RNG is a "noisy diode", an electrical component, a semi-conductor. Diodes c... |
There is empty space between them. Except empty space is [not]( URL_0 ) empty. tl;dr There's a buch of quantum stuff in there. Now what is in between the quantum stuff? Okay... So it's hard to wave your hand through solid rock because the rock is in the way. So it's easier to wave your hand through a liquid because the... |
It's important to realize even without gadgets, powerlines, and wi-fi, you are *still* and *always* being bombarded by electromagnetic waves. Essentially every object in the universe is emitting electromagnetic radiation, including you, rocks, televisions, air molecules, toilets, corn (both harvested and unharvested), ... |
it's mostly based on the situation you're in. even if you just barely notice a balloon in the furthest corner of your view your brain could go like 'you member the time, you had that stupid little baby balloon? i member' |
It depends on the type of music and the level of synchronization needed. I assume you are talking about very accurate synchronization and not just background music that doesn't need to be aligned with specific events on screen. If the music is electronic, it's just a matter of aligning the music track with the video tr... |
half of the world can see the moon at any point in time. and half of the world can see the sun. Of course those 2 halves can overlap some, all (solar eclipse), or none (lunar eclipse). so at 10PM EST/6PMPST, if the moon is somewhere over north america, both coasts can see the moon, but only the west coast will still be... |
typically a lot of these types of food are already cooked and just need to be warmed, or more often re-hydrated. warm water is absorbed faster and thus it re-hydrates the food quicker. (as well as warming it) In addition to what /u/Lokotor said, I'll add this: Hot water is a source of heat. In fact, boiling water in pa... |
> Anyone care to explain? I feel like it has something to do with reincarnation maybe but can't nail the analogy exactly. Saving is storing a file on a permanent storage medium such as the hard drive as opposed to active memory which goes away if the computer loses power. Jesus is supposed to give people eternal life w... |
One of the leading theories deals with whether or not someone "prefers" the dopamine-heavy sympathetic or the acetylcholine-heavy parasympathetic nervous system. Dopamine being the reward center seems to be focused on outward gratification, while it's widely accepted that acetylcholine is focused on looking inward and ... |
It's unconstitutional to ban lying on its own and there was even a recent case about it. In 2005 Congress passed the Stolen Valor Act, which made it a crime to lie about receiving military honors. In 2007, a guy introduced himself at a meeting for his water district board by saying he had a medal of honor, which was fa... |
The same way you write and do math with numbers larger than 9 despite the fact the only digits you have to work with are 0-9, you chain them together. 8-bit microprocessors are designed with instructions that make doing operations with data made up of multiple bytes easy. So for example the "add" instruction included a... |
The sound is converted into a radio wave and broadcast to the receiver, which then receives the waves and converts them back into data. This data could be sound, or it could be any other kind of data you'd like to send. Anything and everything "wireless" works in this way. What makes Bluetooth different from FM radio i... |
Due to the wires having electrical resistance, which means that they resist the motion of electrons, the electrons bump into atoms of the wire, and some of their kinetic energy is given to the atoms as thermal energy. This thermal energy causes the wire to heat up. Things are made of atoms. Atoms have nuclei, positivel... |
Once you get a certain distance from those lights, they become so small they are essentially just points. When light from that point travels through air of a different temperature, it bends, causing it to twinkle. Also, some of those lights are shining through obstructions, like tree leaves. As the leaves move in the w... |
It isn't. You need to be very careful about getting too warm or cold, and manually maintain temperature with adding or removing clothing, ice packs or heated blankets. This is more an issue for quadriplegics which might not be able to sweat very much at all. |
Pretty basic. The audio plug is called a TRS (or TRRS, it depends). The connector has three leads: "left" and "right" voltage signal and ground. You can see this for yourself by counting the number of sections on each audio plug (the sections are divided by bands). The two "positive" leads (the left and right signals) ... |
The soldiers do whatever any soldier does when not deployed. Training, exercises, equipment checks, more training, guarding critical areas, more exercises, etc. However the service time is usually shorter then a more active military. Instead of having a big part of the able men in the nation on standby all the time peo... |
The basic idea is similar to baseball, softball, rounders, and so on. One team bats and tries to score runs, the other bowls and fields and tries to get the batters 'out'. Cricket games owe their length to one simple aspect of the rules: *the batsman doesn't have to run*. They can face ball after ball from the bowler, ... |
Some colors cannot be perceived by our eyes, but we can trick our brain into "seeing" them. An easy trick that work for most people is to rely on "color fatigue" (after watching the same color for a while, your brain will adapt to it and try to compensate by shifting your perception toward the complimentary). This can ... |
Nope, it's nowhere near enough pressure. The pressure at the bottom of the mariana trench is nearly 16,000 psi. The pressure required to make diamonds the natural way? 750,000 psi. You'd have wet coal. *EDIT: The longer this post has been up the progressively weirder the replies have gotten. They moved from scientific ... |
The moon is the closest large object to earth in space, so going to the moon allows us to develop and test a lot of technology related to landing on and moving around on solid, non-earth objects. Mars would be better to colonize for several reasons (atmosphere, temperature, soil, similar hours in a day, etc.), but we d... |
I've had migranes since i started puberty. I'm an adult now and they have changed over time. I no longer get pain with my migranes in about 95% of cases. What i do get are some of the other effects of a migrane. [holes in my vision]( URL_1 ) disruption to [proprioception]( URL_0 ) which is the sense that keeps track of... |
The problem is that it's doing the calculations in binary and can only store a limited number of digits. 0.1 can't be stored exactly in binary, in the same way as 1/3 can't stored exactly in decimal. You get rounding errors similar to the problem you'd have dealing with 1/3 in decimal: 1 - 0.333333 - 0.333333 - 0.33333... |
It was CGI and is, by no means, easy. There's a reason you didn't see much of young Ford. There's also a certain sci-if movie out that did this with an actor who was actually deceased. They hired someone who looked a bit similar and could do his voice, and then painted over his face to match the actor's face. But proba... |
Opening a door into a hallway when you can't see anyone coming is not very safe. Besides you just washed your hands so you shouldn't be leaving germs in the handle. Now think of all the other handles you touch that day. Lol Fire code. If something falls in front of a push to open door, you cannot open the door. If some... |
You'd think that an ant falling from three feet is like a human falling off a skyscraper. But this isn't the case because of the square-cube law. As it relates to tiny things, the smaller something is, the more resilient it is to stresses. What the law means is that as an object's surface area increases by a power of 2... |
What sorts of malfunctions are people experiencing? I'm not trying to be snarky; I honestly didn't realize there were problems with the products. We (my family) bought 3 iphone 5s in December ~~2102~~ 2012 (thanks, /u/naf623, for pointing out my error!) and haven't have one bit of trouble with any of them. 4 years of c... |
Someone will probably come along and give you a longer more detailed explanation but the TLDR version is: Bulldozer cores were designed for high frequencies and multithreading at the sacrifice of ipc(instructions per cycle). Bulldozer's IPC was actually considerably lower than AMD's previous architecture. It's a common... |
Poverty is a moving target. As a country's standard of living increases, the standard for what is considered poverty also increases. Poverty is often defined relative to national averages, which means mathematically it can never be eliminated. Have you heard the expression "give a man a fish, and you'll feed him for a ... |
they are the most dominant traits. there are some people with slightly different eye colors. (yellow and even purple have been found on occasion.) but primarily we have brown blue and green as the most common as they are the traits which "overwrite" other eye color genes. your eye color is determined by your parents ge... |
This isn't a complete answer, but it might help. A big organizations isn't like a house hold. At home, you're in charge of your budget, and it's up to you to give money from eating budget to the home improvement budget if you need to buy a new lamp for example. You hold all the power, so you can take and give as you wa... |
SHA1 is a hash algorithm. It takes some data, runs it through complicated math, and gets something like a fingerprint. You always get the same fingerprint for the same data, but you can't get the data from the fingerprint. SHA1 only produces a fingerprint of 160 bits (1's and 0's). That's like 40 hexadecimal numbers lo... |
> Is there a governing body that specifies the prices of each of these products? No > Are there any regulations as to how these products need to be priced? There's sales tax in some places. Couple things going on: 1. This is presumably shipped all the way from India to the US, that isn't free. 2. Wages are higher in th... |
Perhaps, but we are still far off from that point. Our brains are wired to notice all kinds of details about lighting, things that tend to be computationally intensive to simulate. Hair is still very hard to render believably in real time, for another good example. |
[US] Lottery winnings are generally funded from the sales of tickets themselves. No new money is being created. |
Earwax is a lubricant, just like beeswax or tallow, and it helps to keep nasty things out of the ears. |
because of how electronics work at the basic level. everything is synced to a metronome called the processor clock. the entire orchestra of several billion transitors operates on the processor clock's conductor timing. when processor clock says your data's ready to read, then read, not before. at the electrical level, ... |
It depends on how you define random. If you define it based on someone's relative knowledge, then you can easily have things that are random because people don't know enough to predict them. For example, you may be able to know how a coin will land if you have all the information about how I'm flipping it. However, an ... |
Artistically maybe they wanted to show a "clean" screen without a bunch of menu options on it. But there's really no technical reason to have one. A bunch of games boot directly to the main menu. A better question is why are there unskippable splash screens? And the answer to that is that the game is loading in the bac... |
Back when the U.S. military was developing MREs, they were trying to figure out how to get troops to eat the same handful of meals over several weeks. They realized everyone loved heavily spiced food at first, but got burnt out on it quickly. Meanwhile, they had no problem eating bland foods day after day. Since breakf... |
You're moving along with it. So to you, it is stationary. It's not accelerating or decelerating (much) so there's very little change for you to feel, and the atmosphere is (mostly) rotating with it, so there's no 1000 mph headwind. The same way you don't 'feel fast' in a car moving at a high, but constant, velocity. Yo... |
it's more about your eye muscles disengaging and driftng out. Technically, I guess the brain in ignoring the double vision, which usually is a catalyst to respond by keeping the eyes focused |
Because more of their costs reside in the packaging and distribution than in the chocolate itself. Think about buying sand in giant 200 pound bags or individually wrapped grains, how do you think the price would change per pound? |
A score is just a numeric quantification of your credit worthiness, often provided as part of a paid service to consumers. Most lenders do not care about a score per se, they look at everything to determine exactly what terms of a loan they will offer. Being "on good terms with banks" isn't a precise statement. Banks a... |
Originally it was Woden's day lots of the days are named after Norse gods Thor's day Freya's day or Moon day and Sun day. |
All your internet traffic is sent through a device called a router. That router keeps logs of what IP address (a unique identifier for each computer on the network) performs what actions and what traffic goes through it. If a known viral program is accessing the internet through your computer, we get alerts. If you're ... |
I think steroids they were using back then were legal in competition. I've seen interviews where he talks about using them quite openly. Also, back then was a bit of a 'Golden Generation' for bodybuilders. Arnold was a celebrity and he lifted (see what I did there) bodybuilding into the mainstream. Nowadays every man a... |
100% accurate collision detection is extremely processing power intensive work for a computer so much so that it's not an option for real time video games. There would just be to many checks that would need to be made to see if things are colliding instead game so devs use extremely simplified collisions shapes ( like ... |
Military jets generally aren't allowed to fly at supersonic speeds over the United States, outside specially designated "High Altitude Supersonic Corridors." These jets are perfectly capable of flying slower than the speed of sound. (How else would they take off and land?) The Concorde, as far as modern aircraft go, wa... |
They're already cooked and just need to be rehydrated. Think like a chicken breast...You can boil it and it'll take 20 minutes to cook, but if it's already cooked you just need to warm it through and it takes 5...Same concept different medium. |
Not at all possible. There is currently a 0% chance of a successful revival after being cryogenically frozen. The technology just doesn't exist yet, if it ever will. It's impossible to predict when it might. There are levels of science involved we still have no idea how to overcome, such as the formation of ice crystal... |
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