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Why 100% means a whole of something? Why 100? | "percent" means "out of hundred". So "100%" is just "100 out of 100"> In Ancient Rome, long before the existence of the decimal system, computations were often made in fractions which were multiples of 1/100. For example Augustus levied a tax of 1/100 on goods sold at auction known as centesima rerum venalium. Computat... |
Why do we only define all humans as 1 species compared to animals and insects where very slight differences can define a new species | One of the main characteristics of a species is being able to mate and produce fertile offspringSpecies is simply a fuzzy term. You cannot write concrete rules to classify it, because all of the rules we come up with are bent, or broken. A lot of people say 'they can breed\' and that doesn't work for any species that r... |
What is happening on a molecular level when soap lathers? | I'll try to explain this is the best way, but I'm not the most knowledgeable with the terms. Basically when you rub soap on you,it is like any normal reaction when you rub two objects together: they will wear away slightly. In this case, it is the soap and your arm. But often times just rubbing alone won't create bubbl... |
How do they predict the life span and failure rates of new products? | Torture testing. In the specific case of a light bulb, filament failure typically occurs during the initial surge when the circuit is energized. The test would likely be repeatedly turning the bulb on and off until failure. If it fails after 20,000 cycles and bulbs usually get turned on 4 times a day, the manufacturer ... |
How was the numerical order decided? | Numbers have always existed, even before are species was aware of it. Once humans discovered what 1 of something was, they needed a name for all these numbers. |
Do foreign languages have different speech impediments? | Yes, that is true. For eg. in Hindi the letter t has different sounds. "ट" and "त\t"like . Some people cannot pronounce the letter "ट" and end up saying "त\t". the difference in their pronunciation is quiet a lot. It would be like calling a toy, "doy" |
Why is the albino gene, or mutation, apparent among so many different species? | They really aren't "very" susceptible to producing albinos. They are typically rare. The reasons they exist are typically linked to the mutations to pigment/coloration which don't have a disease state associated with them. There isn't typically a reason they aren't viable animals but they aren't very good at hiding or ... |
What is the difference between representation and promotion? | Representation is aimed at the industry -- a representative tries to sell their client to producers, directors, etc., i.e. the people who create the media -- film, TV, music, theatre, etc. Promotion is aimed at the public -- a PR agency tries to sell their client to the public -- the people who buy the media made by th... |
Why didn't NASA leave the Space Shuttle in space docked to the ISS? | The shuttles were not designed for long durations in space, the heating systems, power systems, life support etc were only supposed to last for a few weeks at a time, then be taken apart and serviced on the ground. Space station components on the other hand have to be designed to be taken apart and serviced while still... |
What makes the erasers on mechanical pencils work so much better than the erasers on regular yellow #2 pencils? | Mechanical pencil erasers are made of softer rubber. They don't last as long, but they work better. Regular pencils have a hard eraser because they're not easily replaceable, unlike the eraser on a mechanical pencil. |
How can we turn on a computer by touching the power pin with a screwdriver? | The computer case power button is a simple mechanical switch. When you press it down, it momentarily connects the two connections within it . These two wires are connected to the two power pins. The powered motherboard is waiting for that signal to turn on. When you touch the power pins together with a screwdriver, you... |
what are "period cramps?" | Period cramps is the uterus contracting to push out the lining. Why some people have worse cramps than others, well, that is a pretty difficult question to answer as there are many factors. There are some disorders that give women worse cramps but there are also a lot of environmental factors that can play a role. Stre... |
Why do I sneeze and my eyes water when I pluck my eyebrows? | I'm not a doctor, but this is because numerous facial nerves are located very close to each other so when pulling hair nearby nerves are indirectly stimulated - some water your eyes, some cause you sneeze . |
How come pictures on the Moon never have any stars in the background? | Stars *are* easily visible from The Moon, and from Earth. But when you see a photograph of The Moon, you are seeing the Sun's light reflect off The Moon and into the camera. The camera exposes for this bright reflection, meaning the shutter speed is too fast and aperture too narrow to pick up the dim, far away stars in... |
How much taxes and where do they go and what’s the reason for them if say I were to win a $100,000,000 lottery | ballpark, it's approx 50%. it's not a special tax. it's just treated same as regular income. but since most people have a regular wage income that's not comparable to a $100mil your regular income tax is inconsequential. they go to normal operations of the states gov. the reason is because taxing the people is how gov'... |
Why, when swallowing tablets, does it sometimes feel like one is stuck in your throat, even if it isn't there anymore? | There is a part of your anatomy in your throat through which food passes, and sometimes if the food or pill scratches the surface, it can cause a residual sensation to persist making you think you have something there. This is also why you think that you have a fish bone stuck in your throat. It takes a while for the s... |
What's the deal with charcoal toothbrushes? What makes them better than normal ones? | Here are the claims they make. - rapidly whitening teeth- deodorizing and removing plaque- preventing bad breath- preventing harmful bacteria from growing within the brush |
How a "Developing" country becomes developed. | Usually they find a resource or commodity that means they make a butt fuck of money, then the government invests in infrastructure that raises their standard of living and pulls them out of the shit. Trade, Manufacturing, Mining of some commodity etc etc could be examples. |
Rooting and modding an Android phone, and all the steps in between. | well what phone? there is a different method for every phone. i would just google 'how to root [phone]'. usually it's putting a file in the root of your sd card or using command lines then putting a rom of your choice on it. |
How come no matter what laundry you put in the dryer the lint always comes out greyish blue? | Try comparing the lint colour from different washes, the colour does vary. At laundromats, other people's lint looks different from mine.This is simply untrue. The lint in my dryer always reflect the laundry. Mostly white laundry: white lint. Mostly blue laundry: blue lint. The royal blend of colors in the laundry: gre... |
How do relatively less educated laborers successfully execute the precise designs of highly educated engineers when constructing buildings or roadways? | This happens in a lot of industries - a typically smaller group of highly educated designers consider all requirements and outside stresses, and come up with a design that will perform under the expected load with margin. All that's required at that point is labor skilled enough to take a set of prints and/or specifica... |
How do scientists isolate and manipulate individual atoms for experiments for colliders such as the LHC? | the only way to detect something is to bounce something off of it, so finding where an electron is requires you to 'feel around' with something, like photons, until you see a chance in the energy states, typically because the electron will be excited and emit a photon of its own or whatever. In particle accelerators th... |
When receiving an injection, what determines where on the body the injection is to be administered (e.g. shoulder, abdomen, buttock, etc)? | Different injection sites are used for different things, there are 3 main types of injection Intravenous Intramuscular Subcutaneous In this order is the rate at which they are absorbed into the system, for a drug you want to be administered slowly I.e insulin you would choose subcutaneous, for steroids intramuscular, a... |
If two grandmasters of chess play each other, shouldn't it be virtually guaranteed that the player who is white wins? | Not necessarily; the problem is that the game isn't solved for all mid-game states, and that is when the magic happens. What you said is true for certain *solved* games (ie: Tic-Tac-Toe should end in a draw every time, and connect 4 should result in a player 1 win in a perfect game. But the thing is: > Assuming they bo... |
When game companies are bringing down their servers for maintenance, what are they doing? | They could be doing any number of things from implementing security fixes to adding new features to the game or updating UI. There is a great number of things they could be doing. However, when servers are brought down, it's because it's usually required for them to end all data transmissions when editing files. It's t... |
Are there any known descendants of Muhammad, and if not, who would Shiite Muslims want to be the Caliph? | There are [literally millions] of descendants of Muhammed now. After that much time has passed, the mathematics of the situation makes it likely that there are either a tremendous number of them or none at all. In this case, very definitely the former.Important historical figures like Muhammad not only have living desc... |
What are movie critics, and why is there opinion valued so highly? | It's not that they just watch movies and get paid for writing about them. Most come from the industry, are familiar with the director's style - and generally have greater insight into the artistic aspect of film, and are more aware of the subtleties in film making. It's like the difference between a musician analyzing ... |
Why do cockroaches fall apart so quickly when they die? | Well one possibility is that it's not a dead cockroach, it's a molt; the cockroach just shed its exoskeleton. But also remember that bugs are kinda . inside out compared to us. We die, and maybe if we dry up our flesh wraps around our bones and might hold us together. But their "bones" are on the outside, so as their m... |
What's with the green light under escalators? | "Escalator companies put lights under the steps near the top and bottom of the escalator in order to silhouette the edges of each step. The improved visibility is supposed to help you avoid stumbling, or worse, as the step slides against its neighbors on reaching the landing area" [Source] |
What takes more effort..pushing a heavy door open or pulling a heavy door open? | The door takes the same amount of force to open, assuming it is hinged equally. It takes more effort to pull though, because the human body is more effective at pushing than pulling due to the number of muscles involved and the higher ability to gain leverage. |
Why do pullies make objects seem lighter when they are lifted? | Pulleys are a way of transmitting work . The pulley systems effectively reduce the amount of force required to pull an object, but inversely proportionally increase the distance you need to pull. Thus moving a 10kg a distance of 1m with a simple 2:1 pulley system would require pulling 2m of rope with a force of 5kg. Yo... |
How does crappy modern art get sold? | Taxes. You can't say a television is worth 4.5 million dollars, but you can say a piece of art is, so you can buy and sell it for an amount, but you can claim to not own as much because a piece of art doesn't have intrinsic value. |
Why does facebook censor anything that resembles a nipple but not horrific scenes of violence and/or religious videos inciting violence? | Because Facebook is an American company and has the American puritanical idea that sex is bad and violence is good. It's something that is deeply ingrained in our society. |
Why do the majority of the people find cold water more refreshing than warm? | When you're exercising, or finishing your exercising, your body sweats to cool itself down. By putting cool/cold water in something that's near the core of your body, you can help cool yourself down faster than drinking something at a higher temperature. |
If I die, will my mother have to pay off my debt? | Because your post isn't asking a simplified conceptual explanation, but rather for an answer, its been removed. You should try /r/answers instead. But no, debt is not inherited, but if you have life insurance and you die, your debts will be paid out of that first before she gets any of it. "make ends meet" is the phras... |
Can you please ELI5 what the hell is going on in movies depicting underground sporting events when drunk men are shaking fistfulls of bills at each other. How exactly does that betting system work? | These scenes in movies seem to suggest a lot of side betting. Before the match people make their main bets with the bookies. Still though individuals might makes bets between each other during the event. If tony Jaa is getting his ass best by some giant white dude I could hold up a 100 dollar bill and yell 100 on Jaa c... |
Why does enamel erode from brushing too hard but isn't damaged when dentists scape your teeth? | A toothbrush covers the entire tooth with bristles and after brushing 2-3 times a day over time it may start to wear down the enamel. The dentists uses their pick tool mainly in between your teeth or very exact areas. Theirs tool are so precise that it poses little risk to removing enamel unless that's what their tryin... |
Why are soft-drinks so bad for you? And why aren't there any "healthy" soft-drinks? | Just carbonating something doesn't make it taste good, necessarily . They are usually supplemented with a lot of sugar, which necessitates adding preservatives to prevent bacteria from growing in the sugar-rich liquid. |
how long does it take for a blood cell to go from your heart, around whatever limb or part of the body it's going to and back into it? | The heart pumps about 6 quarts a minute, depending on how active you are/how fast it is beating. So it takes roughly one minute for a round trip. |
How are companies like Netflix able to spot and prove that an account is using a VPN? | VPNs provide a fairly specific set of IPs for everyone to use. Just like a company can see your IP , they can see the IP of the vpn if you are using one . They can then compare it to a list of known vpn IPs. |
Why can't game companies shut down hack/cheat websites that sell/give cheats? | Often they are hosted overseas, making legal action difficult. Cheat codes are fine, the developers put them in, I assume you're talking about more serious stuff. |
taking a second or third mortgage out on a house | Say you buy a house for 100,000 with interest of 3%. You have that loan and start paying it off,down to 60,000. Now. Time comes, and you need a new garage, because yours collapsed. that costs say15,000. You could get a loan from the bank for 15,000 but the interest rate might be 6%. So instead, you borrow more against ... |
Why do the blind learn braille? Wouldn't any raised text achieve the same effect, while being useful to both those who are and aren't blind? | Take the letters: Q O C D G, or I J L T, or F E B R P Those groups are far too similar to each other for it to be convenient. In braille, they're all recognisably different. |
Why do TV shows have different directors for almost every episode? | This allows them to work on filming different parts of episodes requiring different cast members simultaneously. They also get to prep while other directors are actively filming. Remember that a movie with a single director spends 2-5 years making 2 hours of film. TV show directors get 6 months or less to make 10-20 ho... |
If I hold my pee for long enough, can I burst my bladder or will I just pee myself? | It is absolutely possible to burst your bladder by holding in your pee, although exceedingly rare. The only case I know of is Tycho Brahe, who died in 1601 of urine in his bloodstream . This came about after he went to a banquet. Leaving the table was a serious breach of etiquette, so he held it in for pretty much the ... |
why do I feel so itchy after seeing small bugs, even though no physical contact was made? | Also a thing called mirror neurons , where basically in our head we replicate what we see. Neurons fire when you touch a bug that make your skin itchy. Similar neurons fire in your head as if you were actually touching the bugs when you observe it. It also explains how you can get better at piano by imagining playing p... |
Why is the skin of our lips different from the rest of the body? And why do they thin out as we age? | The reason they thin out is that as humans age they usually have less fat in their face. This is one reason many older people of the same weight range look alike. The loss of fat/muscle slackness also leads to crepey skin, eye wrinkles, thin vertical lines around the lips, etc. Those 'problem areas' are addressed using... |
As something gets closer and closer to the exact center of a body of mass (say, Earth), what happens to the gravitational force from that body of mass? | > So say it was completely possible to drill down to the exact center of the earth. How would gravity change from the surface of earth to the core? If the Earth were the same density throughout, gravity would drop the further down you went, and would reach zero at the center. This is because of something called the [sh... |
Thanks to Calvin and Hobbes, this has bothered me for years. | The RPM is the same, because they're connected. One point can't revolve more often than any other point. But the area towards the outer edge has to move faster to "keep up", because it's got more distance to cover, in the same time. So you 've got it backwards, sort of.If you pick a point close to the center and make a... |
What determines the color the leaves change to in Fall? Do they change to the same color every year? | It depends on the mix of chemicals in the leaves before the chlorophyll goes away. [This site] has all the chemical details, and a great explanation. |
How do cellphone calls made without interfering one another | Older cell phone networks used time-sharing, similar to how landline phones work. The cell tower would assign each person connected to the tower a little slice of time to transmit its message, and then would go to the next phone. If there were no available time slots for your phone, the call would drop. Modern cell net... |
How does a fall injure and kill you? | The fall is harmless. It's when you cease falling so quickly, that body systems become damaged. |
What do people in the US military do while there is no war or military action needed? | Train. The U.S. military is the best trained military in the world. The reason they are so good when it finally comes to war is that unlike many militaries which do sit around the U.S. spends tremendous amounts of money in training, training all the time.The US Military is a war waging device, yes, however that is hone... |
inbreeding vs line breeding: how do you get enough of the same kinda dog to start a new breed? | Pure breds are poison. Do dogs a favor and always get a mutt. Like the other poster said they are riddled with genetic diseases and problems. Plus they are ugly in my opinion. Don't create dog breeds just let dogs diversify. |
Why does the "castle" move exist in modern chess and do other "chess" games have similar moves? | Castling was not a part of chess when it was created, but it was added over time as the game evolved. Originally, the other pieces on the board were weaker , and as such, the King wasn't as vulnerable. However, over time, rules were changed that made the other pieces more powerful, and the King more vulnerable. A few r... |
The different stages of cancer and what they represent? | This might make it a little easier. Stage one though is typically considered isolated to the area and usually doesn't require further treatment once it was removed. Then monitoring for reoccurrence at your doctors discretion. _URL_0_ And while this was about breast cancer the staging is pretty much the same for all. In... |
How does weather affect the quality of human hair?? | What do you mean by quality? People who have lived in warm climates for generations tend to have thick, curly hair to protect their scalp from harmful sun rays. This is why black people have the "typical thick black people hair", because they originate from the warm Africa. |
What are Tesla coils? How do they work? | There is a lot of jargon which can be used to explain what a Tesla Coil is, simply put, a tesla coil is just a wound copper coil which has a high current put into it until it discharges an electric arc through the air. Tesla's 19th century design is still used, btw. They haven't changed much. What are they useful for? ... |
sprouted bread and other sprouted stuff | You're right that flour can't sprout, but wheat grains can. Usually you 'd take the grains and mill them finely to make flour, but when you use sprouted grains you soak those grains in water and let them start to grow into a wheat plant. You don't let it go too far towards a full-blown wheat plant though, I think the A... |
why are police officers allowed to lie to someone they are questioning? Wouldn't that invalidate the conversation? | Questioning isn't a "conversation". It's "trying to get as much useful information out of the suspect as possible"I think what you mean is wouldn't that make anything said by the defendant inadmissible as evidence? And the answer is, no. There's no law against lying. Specific sorts of lies can get you in trouble, like ... |
how does an electrical-ground-wire work? | If you have a faulty appliance that becomes live, the current from that will try and find its way to earth in the easiest way it can. If the appliance isn't earthed , the easiest way for that current to reach ground might well be through you, which would give you a shock and possibly have worse implications. Earthing i... |
How is it that I go to sleep fine but wake up sick? | Your body continues to function while you are asleep. Then, you add on the fact that you are not actively suppressing the symptoms and you wake up feeling worse than you went to bed', "You are probably already sick when you go to sleep, even if you feel fine. The malice that people feel after waking up seemingly sick w... |
What is cyber harassment? How are people prosecuted for it? | There are a couple of differences. First of all, neither verbal arguments nor arguments online are necessarily crimes. *Sustained* attacks over a period of days are a crime, whether verbal or online. The next difference is evidence. Even when you do something wrong, the police might not arrest you, and probably won't p... |
Why are there fractal patterns all over the place? | Because they're easy. Apply a rule, and then apply it again only smaller and so on. Turns out to be much simpler than having a set of rules which are conditional on scale. |
Why does sunlight bleach/lighten things? | The rays, especially the ultraviolet ones, are breaking the bonds of the molecules of the colored compounds. So they lose their color. It is the more energetic photons, the higher frequency ones, which do this best.It's because of the radiation from the Sun, which is more popularly known as sunlight, which is a mixture... |
what are the basic differences between The FBI and The CIA | The biggest difference is that the CIA is not allowed to operate in the USA.The CIA is responsible for gathering intelligence on other countries. New dictator in power in the Middle East? The CIA are the ones rifling through his sock drawer looking for his secret plans for world domination. Unless they're the ones who ... |
Why is it that when you look at water, sometimes it reflects light, sometimes it is see-through, and sometimes it is just it's own color? | It's because water has a refractive index that varies depending on the purity and temperature of the water, and it's significantly different from the refractive index of air . Depending on the refractive index, the source of light, and the position of your eyes, you could see water as reflective, transparent or with di... |
How was Frank Lloyd Wright able to design a large number of homes, in relatively unknown neighborhoods, in an era that had limited means to communicate with others? | It wasn't as "limited means" as you may think it was. In the late 1800s, when Wright was producing houses, folks with money would all be reading the same national newspapers and magazines, and many of them would travel to big cities like Chicago or New York and want to bring slices of cosmopolitan, modern experience to... |
did David Bowie's voice change? | [Well he did smoke] He also did various other drugs, which can affect your voice are well, and he also changed his musical style a lot. And the voice does tend to lower with age. A good comparison would be Sting. [here] with The Police, and [here] solo just a few years later. Still singing fairly high, but the timbre h... |
What's the deal with the mesh in men's swim trunks? | Swim trunks tend to cling tightly to the body when the fabric gets wet. The mesh prevents the swimwear from clinging tight to men's "junk" in 2 ways: - first of all, since it's just an inner layer, the inner layer can cling without having as noticeable an effect on the outer layer - the holes in the mesh help prevent t... |
Can a black hole suck up another black hole? | Yes. Black holes aren't really holes. They are extremely massive objects which have collapsed under their own weight. |
Why is typically considered worrisome when a baby doesn't cry/make noise after being born? | When the baby is still in the mother it floats I'm a sack of fluid and breaths that fluid in. When they are born they need to get that fluid out so the baby can start breathing air and doesn't drown since they are no longer receiving oxygen from their mother. Crying is a sure sign of breathing so if they are not crying... |
How do people like John Oliver and Jon Stewart not get sued for defamation/libel? | * what they say is often true* when what they say isn't true, it is pretty obviously parody or satire, protected forms of expression", 'Parody and satire are protected forms of speech. Also a libel/slander suit for something said about a public figure is incredibly hard to win.It's not defamatory or libelous to tell th... |
Why are some of the best athletes injury prone? | It can be reasoned that those who are the best at their sports are those who push themselves as much as possible to attain that goal. As such, they are also much more likely to injure themselves. If an athlete "plays safe" and doesn't strive for being the absolute best, they won't hurt themselves - but they won't *be* ... |
How can an odometer be accurate when our speedometer isn't? | The short answer is that it isn't, but probably isn't inaccurate enough to really matter. That said, if your speedo is off by that much you should have it adjusted by a mechanic. |
How is Monster Energy allowed to claim some of their drinks contain zero calories, yet there's 4g of carbs per can? | The FDA allows numbers on Nutrition Labels to be rounded to the nearest whole number. If those 4g of carbs amount to less than half a calorie per serving, then the manufacturer is going to take advantage of the situation and put 0. & nbsp; As for the erythritol, the regulatory definition of what counts for the purposes... |
Definition and meaning of 'inertia' in a simple way. | If you put something in motion it will maintain that motion until something stops it. Most of the time what screws us up is friction, but if you could get rid of friction, once you got your automobile up to speed, it would continue at that speed, in that direction, forever, unless something pushed against it to make it... |
Why does a helium balloon lose its ability to float after a couple of days? | My understanding is that the helium molecules are small enough to slowly leak through the rubber of the balloon like a sieve. Therefore, after a few days, the helium is not there to keep the balloon afloat!This is generally due to the rubber used to make most balloons being semi-permeable to gases. Over time, the heliu... |
How does a scissor cut a sheet of paper? | [What scissors do is break these fibers apart.] You're confusing atoms with molecules. The atoms can be relatively the same size however molecules can be infinitely different in size. I don't know much about the properties of paper to go into how the bonds interact specific to this question. What's happening is the pre... |
What exactly is that 'clearheaded' feeling? | You seem to be talking about alertness. It's just awareness of your surroundings, and it feels good partly because in our species\' history we were safest in that state. When that *really* mattered, *not* being in that state was a mortal threat. It's probably not the actual state of being alert and aware that is pleasu... |
Why are there different ethnicities? | Until 100 or so years ago, we didn't have TVs, radios, or airplanes. People just lived in one place without ever really leaving. When you have groups of people that are cut off from each other, their language, customs, etc. will drift apart. If there's some genetic differences in the starting populations or differences... |
Why is Bruce/Caitlyn Jenner such a big deal? | > Why is Bruce/Caitlyn Jenner such a big deal? Because she's a celebrity? > Transgender people are, to my knowledge, not denied gainful employment opportunities because they're transgender. Yeah, a quick web search shows that's not the case. Transgender people are denied gainful employment opportunities because they're... |
Why is Weed affiliated with the number 420? | "The most credible story traces the date to Marin County, Calif. In 1971, five students at San Rafael High School would meet at 4:20 p.m. by the campus’ statue of chemist Louis Pasteur to partake. They chose that specific time because extracurricular activities had usually ended by then. This group—Steve Capper, Dave R... |
How do laundry dryers collect lint? | Hot air is blown in through a vent in the drum, the air exits the drum by a second vent which has the lint catcher placed between the drum and the rest of the exhaust system. Since the hot air has to travel though all your clothes, it picks up the lint and is blown towards the exhaust vent and lint catcher |
What does fire consist of? Fire itself is energy thats being released I suppose, but the visual element of fire, what makes us able to see it and what is it? | The first is from the chemical reaction itself. Combustion is an oxidation reaction, where some element combines with oxygen. In a candle, this results in a pale blue flame close to the wick caused by "molecular radicals" that are excited, and emit light as their electrons fall back down to more stable orbitals. The or... |
How do helical grooves in the gun's barrel cause a bullet to spin? And why is it important for a bullet to spin? | The rifleing in a rifles barrel is tight enough that for the bullet to pass down the barrel groove marks get cut into it forcing the bullet to spin. As the bullet leaves the barrel it still has the spin, because of angular momentum. Because the bullet is spinning any irregularities in it's surface that would change it'... |
Why are some children more energetic than adults despite receiving less nutrients and having to spend a lot of bodily energy on growth and learning? | A two-year-old typically consumes about 1000 calories / day. So, about half what an adult consumes. Meanwhile, the two-year-old has only 1/5th the body mass of the typical adult, so it requires much less energy for them to move at a given speed.Feeling exhausted doesn't mean you are incapable of another go. Notice that... |
The difference between this sub and the Ask****** subreddits | This subreddit works best if you already have an answer to your question, you just need it explained to youPeople around here try to break down answers to a level, where they are very easily understandable. We try to avoid technical terms and if there is some complex part that is hard to get, most people here prefer wr... |
Why does scratching an itch temporarily relieve it only to trigger more itchiness afterwards? | When you scratch at an itch, your nerves transmit pain signals to the brain. This blocks this itching sensation temporarily. It's like you are distracting your brain and causing it to pay attention to something else. The brain responds to pain signals by releasing the neurotransmitter serotonin. A study done at Washing... |
What is the female equivalent to the random erections males get during the day? | In terms of a physiological response we can't control but are embarrassed by, I'd say hard nipples. It kinda sucks to be out someplace and realize your high beams are on.It is really hard to compare because our sexual organs are so different. I guess the closest comparison would be random vaginal wetness for absolutely... |
Why do spacecraft need to travel to space using rockets instead of just using a jet engine to rise at a gradual incline like an airplane? | Jet engines, by design, requires air from the atmosphere to work. Rockets work by bringing oxygen in tanks, so it can burn in space. Having two types of engines, would add lots of additional weight, requiring even more fuel to lift it offJet engines require a constant flow of oxygen from the atmosphere to be mixed, com... |
If Drive-In Movie Theaters were so much fun and so many fond memories were had there, then why isn't there a resurgence in them? | There hasn't been a resurgence, you're right. Living in inner-city Houston, I had to drive 45 minutes to get to the nearest drive-in and I loved it. It was cheap, you got to see two movies, and you could smoke, eat, or drink in your own car listening to the movie over the radio. Still, they were only open on weekends, ... |
Honey is the only food that never spoils. Why? | Honey can spoil if you add water to it, that is how we get mead. But in it normal state it has relatively low water content which makes it hard for micro-organisms to live in it, and it has anti-microbial properties that kill micro-organisms making it even harder for them to live there.Should also point out that honey ... |
What's the alt-right... and is it as bad as everyone on Facebook is making it out to be? | The alt-right is a catchall term for right-wing conspiracy theorists, neonazis, generic racists and xenophobes, certain hardline religious groups, climate change deniers, some of the less sane Libertarians, and other groups like that. They don't all believe the same things, and they aren't necessarily terrible people. ... |
Why does nicotine enhance the realism of dreams? What are some other things that may have this effect? | Vitamin B6 [certainly does] . I also happen to be wearing a nicotine patch to quit smoking and also take B12. Wow. This combination has added a realism to my dreams like none other. As to why nicotine aids in this, I can only find anecdotal reports in dream-related forums that because it has been shown to increase focu... |
Why there is an initial moment of no pain before the pain hits after stubbing my toe. | Sometimes it can take a bit for the "pain signal" to be registered by your brain, in other scenarios / injuries, the brain will actually prevent you from feeling pain as a fight or flight mechanism until you're "safe" |
Why are teachers exempt from the overtime laws/changes? | Teachers aren't paid by the hour. It's as simple as that. The way it was when I knew the way it was, was: Each school district has a pay scale, like a matrix, that tells what the base annual salary is for a teacher with X years experience and Y credits. Add to that a fixed fee for coaching, or mentoring the math club,... |
engineers of reddit. What was the technical thinking behind the penny farthing bicycle? | The problem was gears; for one revolution of the pedals you needed to move a reasonable distance. Until they added gears the solution was a gigantic wheel. |
Why do people think chunky drinks are gross? - Isn't it the same concept as soup? | I think it is more finding an unexpected chunk in something that you weren't expecting it to be in. With soup, you are expecting it, with drinks most people are startled by it. When you have a fruit smoothie, chunks of fruit or whatever is in the soup are to be expected. With a protein power, theoretically, everything ... |
Who pays for what is done on reality TV shows and how these shows make a profit. | Reality shows, like game shows, are super cheap to make. A top show like *NCIS* is paying millions of dollars per episode in actors salaries alone, not to mention writers, sets, and a huge production crew. $100K in remodelling is cheap by comparison. |
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