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Why would exercise like cardio stress my heart in a “good” way when drugs like cocaine stress it in a damaging way?
I might be incorrect, but I think I remember this correctly. The reason your heart races when you exercise is that your muscles need more oxygen in the same time. So the blood vessels grow, blood pressure drops, and heart rate increases. Drugs make your heart race for a different reason. Muscles need the regular amount...
Why does breath stink if you don't eat?
If you're talking about acetone breath, it is because in prolonged periods of hunger the body uses up all of it's glucose storages and after that starts using fats. The fats have to be broken down to ketones to be used by the brain and rest of the body, which leads to a state called ketosis. Those ketones can be excret...
Why can cats never decide if they are going out or staying in?
They can decide . . . it just takes time. Any animal that sleeps 20 hours a day is on a different temporal wavelength. Why choose between "out" or "in" when you can do both?The house painter opened our front door, painted both sides, and left it open all day. The cat sat on the threshold for hours. He was probably thin...
Why wont an Xbox dvd work on a Playstation, or computer?
Are you talking about the video games on discs? If so, they are Blu-ray now, but that doesn't matter. Your question is the same as "Why doesn't this Windows program run on Mac?", it's because they have different programming. All Blu-ray movies can play on all Blu-ray players because all Blu-ray players are programmed t...
I'm not creative at all but my dreams are incredibly imaginative and vivid - how is this possible?
When you dream, many of the critical thinking areas of your brain operate at a reduced capacity. So while you might think you, for example, improvising an amazing piece of music, that is just your brain's uncritical impression of it.It probably means that you *are* creative, but might have a hard time expressing it or ...
What is the difference between the meat around a chicken bone (thigh/leg) and chicken breasts?
Dark meat contains Type I fibers, White meat contains Type II Fibers. Type IRed fibers. Slow oxidative . Contain:Large amounts of myoglobin.Many mitochondria.Many blood capillaries.Generate ATP by the aerobic system, hence the term oxidative fibers.Split ATP at a slow rate.Slow contraction velocity.Resistant to fatigue...
Why do so many people have bad appetites, wouldn't this be deadly out in the wild?
Why? Quite simply, because they're not hungry. They live in a world in which it's ok to "not like that". When food is matter of survival, there's no choiceWhat do you mean by "bad appetites"? If you mean that people like fatty and sugary foods, foods with high fat or sugar were actually good for survival in ancient tim...
Flavor discrepencies between milk and ice cream
Ice cream is basically a custard that has air beaten into it while it freezes. Ingredients for basic chocolate ice cream would be egg yolks, cream, milk, sugar, and some sort of chocolate . You mix and heat ingredients, let them cool, add them to an ice cream maker in a freezer. The ice cream maker constantly churns th...
What kind of inventions/technology can we expect with the discovery of a pear shaped nucleus?
Not all discoveries lead to a practical use. Sometimes science is just science for the sake of science. The end goal of science isn't to make something The end goal of science is to understand it.
Why do we explore outer space and what benefits does it have to our planet?
Space has conditions that are unexpected and cause materials and situations that we would never expect. Using the old adage "necessity is the mother of invention" in space there are only needs to be found because of these scenarios. As a result, if you want rapid acceleration for technology that enhances unexpected are...
Why does a kettle get quieter the closer it is to boiling?
The lower temperature causes the vapor to recondense into liquid and the bubbles collapse, making a noise. When the water is uniformly hot and the bubbles make it to the top gradually louder, as bubble production increases, until the water is so uniformly hot that the bubbles make it to the top without popping.
Why does it seem like all Caribbean islands (Jamaica, Bahamas, Bermuda, Puerto Rico, etc.) seem to be third world countries, with terrible economies and infrastructure?
Historical and geographical reasons. Most of those islands were colonized by Spain in the 16th and 17th century and used to produce sugar and tropical fruit crops. The colonial government had little interest in improving infrastructure, education, or standard of living and many of the residents were slaves. When the Sp...
Why is it easier to parallel park in reverse rather that forward especially since it’s easier to see in front of you?
It's because of the way the wheels are set up. "Most" cars have front wheels that turn, which means that your turning radius when going in reverse is different than when going forward. Additionally, the direction of turn is swapped making alignment easier when backing inFirst you need to put the non-steering wheels clo...
Why does the current century not line up with the calendar year?
Year 1-100: The 1st century. Year 101-200: The 2nd century. Year 201-300: The 3rd century. Year 301-400: The 4th century. Year 401-500: The 5th century. Year 501-600: The 6th century. Year 601-700: The 7th century. .. Year 1801 - 1900: The 19th century. Year 1901 - 2000: The 20th century. Year 2001 - 2100: The 21st cen...
If black hat hacking is illegal, why are conventions not illegal?
Because of the First Ammendment/Free Speech. Talking about doing something is not the same as doing that thing.You could have a convention to talk about serial killers. That doesn't mean anyone who shows up killed anyone.
Why American's pay $0.99 for a song on iTunes and Australian's pay $1.69
Most of the mark up is done by those who hold distribution rights within your country. Interestingly with the US minimum wage it takes about 8 min of work to earn enough to buy the song. In Australia at your minimum wage it would take you about 7 min of work to earn enough to buy the song. So they are more or less equa...
If fish are cold-blooded how do they move so quickly in ice-cold water?
There are different methods depending on the fish species. Some are adapted to the colder water, their body's proteins most efficient at the lower temperature. They can idly swim and save energy for short bursts of speed when needed. Combine that with colder water often holding more oxygen and it can be quite the syste...
Negative Feedback Loops in the body.
The best way to explain it is with an example. You have a nightclub. You have people counting the number of people going in and out of the club, to make sure you aren't over capacity. If too many people go in, you close the entrance until some people have left, at which point you can open it again. In this example, you...
Airbus/Boeing Advertisements, Who are they trying to target?
They're trying to drum up public confidence. It gets people to invest in shares. Also, when you book your next flight, you might choose an airline or flight that flies your preferred aircraft, rather than the airline that flies some other aircraft. This signals the airlines to buy more of your preferred aircraft.Advert...
How do liquids like alcoholic beverages and coffee dehydrate you when they contain water?
Alcohol and caffeine are substances known as diuretics, which are substances that increase the production of urine. The major component of urine is water. When you drink beer or coffee or soda, the alcohol or caffeine exerts its effect on the body and the kidneys begin to increase their rate of filtration, pulling more...
When taking photographs why do we have landscape and portrait modes in phones when the camera looks the same either direction?
it probably has to do with optimization of viewing pictures on the phone. taking a photo in portrait makes sense if you wanna view it on portrait, as it will fill up the entire phone when the phone is in the portrait position. taking a photo in landscape makes sense if you wanna view it on landscape, as it will fill up...
I've never seen even a picture of a fuselage on the highway. Where and how are airplanes built?
Contrary to the other answers, large aircraft assemblies are routinely airfreighted around._URL_0_Holy shit my little part of Montana is relevant! [here is a story from not too long ago]. Edit: look at all you fools thinking fuselages are only flown around! HaThey build the whole thing in one factory, and then fly it o...
Why professors give exams they know almost everyone is going to fail.
The purpose of a class isn't to pass students, its to teach a given curriculum. Maybe he's just a dick, but it's entirely possible most students don't understand what the class teaches after a semester's study.So that he can actually measure the performance of the class. Giving an exam that 90% of the class gets 100% o...
Do animals experience the same emotions of “cute” as humans do?
I don't know if it's even possible to answer such a question. It's like asking whether another person sees the colour red the same way as you. You may both know that this colour is called "red", but their brains might interpret it differently than you. We probably can't even answer if your subjective feeling of "cute" ...
Why is not recommended to switch back from synthetic or semisynthetic motor oil to regular mineral oil or viceversa?
Because it's a myth. Your engine doesn't care. However, on old engines starting on synthetic might, just might, cause a leak. Moreover, it doesn't make sense to switch: why did you pay extra all those times and now you're too cheap? Just pick one and don't worry. Most people get rid of their cars long before it needs a...
Why don't doctors just use digital scales and instead use the Physician Scales
Electronic scales can't be nearly as accurate as balance scales. Why? Because the earth's gravity varies by more than 0.5%, depending on where you are. That means that an electronic scale might show you weighing 200lbs in one location and 201lbs somewhere else. Scales that work by balancing your weight against other we...
Why a hot road sometimes appears black.
That's a mirage! The air close to the hot ground is lighter than the cold air above and causes the light to refract. [Also why people lost in the desert "see" water ahead but they can never get closer to it. It's a mirage.]
the proper use of the word "myriad"
The [Merriam-Webster] entry is pretty good: > 1 - ten thousand > 2 - a great number < a myriad of ideas > And the usage discussion is probably what you're looking for: > Recent criticism of the use of myriad as a noun, both in the plural form myriads and in the phrase a myriad of, seems to reflect a mistaken belief tha...
what's the deal with relative humidity?
It is actually quite simple. The term you want to search for the measurement of the *actual* amount of water in the air is Specific Humidity. Specific humidity is measured by Grains Per Pound or GPP. This measurement is the number of grains of water within 1 pound of air . The warmer air gets the more grains of water i...
How do websites like PirateBay and other illegal websites manage to host their websites?
One major lynch-pin was that these websites did not host illegal content. Rather, they simply allowed people who were hosting it themselves to get together. Add this to the different laws where the sites were hosted and the fact that the US doesn't have nearly as much power as it thinks it does, and it is very difficul...
What is a standard deviation and what can I tell from it?
Assuming that the numbers for which you are calculating the standard deviation represent a sample from a larger population, and that you intend to learn something about the larger population based on the numbers you have in front of you, then a larger standard deviation implies a higher uncertainty in your understandin...
Why can I buy 'made in Canada' bacon in the U.S. for $1.75/lb but no less than $5 in Canada?
Where the fuck can I buy bacon for $1.75?', "Nafta and major meat suppliers of the USA & Canada have fluctuating sales-mergers with their over produced stock. There are not only more people to feed but the US has far more successful food related shopping departments in than Canada does therefore the probability of sell...
How does a doctor or paramedic treat a cut throat or jugular wound?
You follow your usual ABCs - airway, breathing, circulation. If the actual windpipe is compromised, you can apply pressure to maintain a seal or do an emergency tracheotomy to insert a breathing tube. If a major vessel is damaged, you apply pressure to minimize blood loss, apply necessary medication to maintain blood p...
Why is it such a "Taboo" to talk about how much you get paid at your job with co-workers?
Companies don't want you to know what everyone else makes. It's harder to value your own worth when you only know what you make. When people know what others make, they might be more likely to demand more. So, by making sure only you know how much you make , the company tends to get to pay people less', "It's not, that...
How can this missile-UFO thing be only explained after the fact?
All relevant parties were alerted. There was a publicly available notice to air traffic to avoid the area. Just because nobody told you doesn't mean nobody was told.
If a novel is originally written in a foreign language, how much influence does the translator have on impacting the quality of the book?
A lot. You can rarely just directly translate a language from one into another. If there's an expression that doesn't translate then something else will have to be chosen to make up for it.
Parent button on reddit.
It's added by [Reddit Enhancement Suite]. When you hover over it, it'll display the what the comment you're reading was a reply to. Useful when someone refers to something in the comment they're replying to, which is now three pages up.
Why do I suddenly feel well again right after vomiting?
Vomitting is a natural reaction when signals are sent to your brain from your stomach detecting something that is harmful. Food poisoning, for example, causes the body to dispell everything from the stomach until the poisoning is mostly gone from the stomach and blood stream. If it's a one-time thing, then it's likely ...
Why does the sound of nails on a chalkboard drive some people to insanity, yet has no effect on others?
I once heard this has to do with high sound being used as a warning for danger. Back when we were apes, we used to scream in a highly pitched voice when in danger. Actually, we still scream as automatic response when we get scared, and your body reacts on that.I heard somewhere it has something to do with our evolution...
Why do people come to fast food places in groups rather than a steady flow?
People get off of work to go to lunch at the same times. People don't go to lunch at 10:37, they go at 10:30 and 10:45. This means that large groups of people are leaving their various offices at around the same time, with around the same distance to whichever fast food place they're going to
Is it possible to get cancer in any part of your body? Are there parts of your body that are immune to cancerous growth?
There is not . If a part of your body contains living cells, those cells can turn cancerous. You can get cancer of the bone, skin, muscles, blood, cartilage, nerves, etc etc.No one's quite given a complete answer. Technically yes, cells from any living tissue in your body could potentially become cancerous, but some pa...
Why does an extreme lack of sleep seem to temporarily change an individuals mannerisms and personality?
Mood and sleep are linked. When you are overly tired, you lose some abilities to regulate your emotions, so you feel more emotional extremes than usual. At the same time, sleep deprivation causes the same kind of impairment as alcohol intoxication. So you subjective understanding of what you are experiencing isn't nece...
Babies are submerged in fluid during their time in their mother's womb. Why don't they drown?
They don't breathe while in their mother's womb. All their oxygenated blood and nutrients come from their mother via their umbilical cord.
The terms proletariat, bourgeoisie and serf.
A proletarian is someone who's main contribution to the social structure is his work itself. His labors adds value to the economic system. This is basically like saying someone today is "middle class". Bourgeoisie is something that is much higher class. The contribution to the economic system is their money in general....
How is water from a well potable?
the way water flows down into ground reserves acts as a natural purification process. most often well water is naturally clean enough, but modern day wells is treated as a precaution, but prior to this, people regularly drank well water untreated.It's often fine as the ground acts as a filter in a sense. If you think a...
Why do we breathe in heavily/sigh when something upsets us?
We sigh to reset breathing patterns that are getting out of whack and keep our respiratory system flexible. In times of stress, when breathing is less variable, a sigh can reset the respiratory system and loosen the lung's air sacs, or alveoli, which may be accompanied by a sensation of relief. That might be why sighin...
Why do I have windows updates available immediately after installing all updates and rebooting?
Because some updates require prior updates before they can be installed. Can't put the second floor on before you build the first.
How is it that we can not feel hungry but still crave and eat snacks?
Two reasons: 1. Chemical needs: Cheetos, salami, both high in sodium you wanted something salty. Rice, carbs. Dal idk what dal is and am to lazy to google it. I'm guessing your proper dinner wouldn't have been a salty mass of carbs though.2. For some people eating brings an emotional high. Not a high like heroine or an...
Why have bats never grown as big as birds or pterosaurs?
Prehistoric creatures are thought to have grown so large because they had time in which to do it. Now, that's not to say that a single bat with a particularly long lifespan will ever be the size of an airplane. What's important to consider, though, is the length of time that various species had to evolve. The Earth has...
Why are competing car dealerships always so close together?
[It's called Hotelling's Law] -- essentially, if you do the math, the best bet is to be close to your competitors so that your competitors don't get customers by default for being 'closer' -- [it's better to be closer to a competitor than further away from customers]. *edit: had the name wrong*
In a video they talked about that now the best theory is that there are no particles, but what we observe are vibrations in fields. What.
They're talking about quantum field theory. It's hard to explain the difference between field theory and "regular" quantum mechanics at the ELI5 level, because at this level, you probably don't know much about "regular" quantum mechanics. But yes, in QFT what you have are fields. Each kind of particle gets its own fiel...
How do automated/self-driving cars work?
The same way a human does. Using sensors the cars can use various algorithms to determine where relevant road markings are, read signs, or otherwise get all the information put out there for human drivers. It uses this data to inform its decisions on how to move the car. It moves the car using various mechanisms to int...
Why do we want to spend our day at home being lazy but then feel like we wasted the day or depressed about it?
I don't think this applies to everyone. I love lazy days where I do absolutely nothing but drink coffee and play Xbox. I feel very refreshed at the end of one and not have a single regret.Because there are others who are way more productive than you and then compare themselves to you making you feel bad.
why do clothes shrink in the drier?
It is the slow process of them gradually eating all of your clothing. Socks are usually the first to disappear.
Why do we enjoy depressing/sad stories (movies, books, gamers, etc.)?
Yes, they help us notice our own sad feelings, which we often push aside. Looking at *someone else* being sad is sometimes more tolerable than directly confronting a sad thing in our own life that we need to notice.I've thought about this before, my ideas: 1. Maybe it's cathartic to release feelings of sadness through ...
- When it comes to short distance sprint track and field events (100m/200m), why are black athletes far superior?
At the very pinnacle of athletic performance, where everyone is training the same, has the same nutritional advice, and people are just trying to shave tenths or even hundredths of a second of their times, it really does come down to genetics. Even the slightest genetic advantage becomes a make-or-break win condition. ...
Is it possible with the current technology that we have now to make AI able to code new lines of code itself after establishing a base code around it?
Yes! In fact I have a specific example of when that's the case. Auto-written code is pretty common on really large projects. You don't need a programmer to type every line in, that'd be way too costly when you're paying them a premium! Programming is all about logic and setting up the logic in a way that gives a desire...
Why is Nuclear Energy good for us?
Started with my own thoughts, and then added points from [this article]: **Pros:** - [Minimal] carbon emissions.- Continuous, reliable power.- Low running costs.- Uranium is readily available.- The amount of power provided per pound of Uranium is higher than other options, like coal. **Cons:** - Risk of radiation expos...
Shia Labeofs #IAMSORRY installment and the general cause of him being in the spotlight
I'm not actively following the issue. However my understanding is this. He was going an art project where he sat in a room with a bag on his head. Other people would come sit with him and they would sit in silence. The important thing is that he not react or interact with the people in any way. Many people came to sit ...
How do lightmaps work in video games?
If you understand how textures work, lightmaps work the same way. The game engine calculates a new texture for all of the static lights in a scene, and overlays that light information on top of the actual textures. Since the original textures are kept and the lightmap texture is overlayed, dynamic lights can then inter...
Are Liberals over exaggerating climate change for personal gain or are Conservatives undermining the topic for personal gain?
When over 95% of the scientists in a field accept the evidence for something , it's ridiculous of non-scientists to claim it's not real. The people who are claiming this have no actual concept of how any of the science works, just like the anti-vaxxers don't know how development or vaccines work. Many other things that...
What is the difference between something having "a following" and "a cult following", more specifically talking about movies, shows, and other media.
Generally a following just means that something is fairly popular. A cult following means that it is popular with a relatively small group of people, but that those people are diehard fans of it. For example - Firefly /Serenity . The show ran for one season, out of order, did poorly, got canceled. Not that many people ...
Is MSG bad for you?
it is all hyeteria. in a experiemnt, MSG was shown to have no effect. _URL_1_ _URL_0_', "The wikipedia article on MSG states that in rats the LD50 is 15-18 grams per kilogram of body weight. Imagine how much you would have to eat. At least a kilogram of MSG! Another study I read on rats did acknowledge health defects s...
Why did humans evolve to be so much slower than other meat-eating mammals?
One currently popular theory is that we evolved to be good long distance runners rather than good sprint runners. Most mammals can't pant when running faster than a trot, and so can't regulate their body temp. Over a marathon course, a human can keep a gazelle moving until it drops from heat stroke, walk up, and stab i...
How does my brain know to wake me up approximately at 6:30 AM (give or take 10 minutes) each morning even on weekends or when I'm up late?
Circadian Rhythm. Basically your body likes routines. If you go to sleep at the same time and wake up at the same time everyday, so long as you're getting enough sleep, your body will fall into that pattern and wake you up without an alarm! Science is cool", 'Though habit and environment. Your body is used to sleeping ...
Why is philosophy important?
All answers here will be subjective. My personal opinion is that learning philosophy is important because a it teaches you how to think critically about yourself and the world around you. Learning about what Plato or Sartre thought isn't terribly helpful, but learning about what YOU think about what they thought can te...
How does light both travel so fast that time "stops" from its perspective, but also takes a year to travel a light year?
Instead of looking at light speed, look at near light speed. If you are travelling at near the speed of light, time will slow down for you due to the acceleration you use to get to and from that speed. So, even though from an observer on earth you might take twenty years to travel from earth to some particular destinat...
Why people in Star Wars doubt the force exists when they clearly see it being used to choke people, move objects, ect.
Remember that relative to the proportion of people in galaxy, only a tiny, insignificant amount wield the Force, even during the height of the Republic before the Clone Wars. Now imagine after Vader killed most of them off. Even if they were alive before the Clone Wars, chances are most have never encountered a Jedi or...
Why do some TV show themes have a higher pitch in its' later seasons?
If they've been sped up slightly, to cut the time wasted on that noise, the pitch will be a bit higher. Think Chipmunks.
If bathroom hygiene is so important why don't we get sick after performing oral sex?
It's more a matter of frequency. If you consider all the times in a day you touch a person or touch something they touch , it ads up to a lot of exposure. If you sucked that many dicks, every day, from that many random people, you would probably get sick a lot.
Why isn't the reddit administration taking action against SRS, even though they are in violation of the new policy?
This question requires users to speculate, so it has been removed. That doesn't mean it's a bad question, it is just better suited to a different subreddit. Try /r/askreddit, the comments section [in the announcement], or another more general "ask" subreddit instead.
Why do some plugs have ground prong and others do not?
If there is the possibility for an internal wire to come loose and electrify the device itself, it is required that there be a dedicated ground prong that is connected to the device. If this is impossible, usually due to extra layers of electrical insulation between the electrical components and the outside case, then ...
How does your body keep food/drink from going into your lungs and air from going into your stomach?
There is a flap called the epiglottis that sits at the top of the split to the trachea and when you swallow this flap covers the hole preventing stuff from getting into your lungsThink of a fork in the road, food / drink goes left, air right. There is a flap that directs the incoming material to its proper section.
How can lawyers promote "no win, no fee" cases.
It's a lot simpler than you might think. The initial consultation is free so they can listen to the merits of the case. If they don't think they can win easily, **THEY DON'T TAKE THE CASE.** That way they don't have to worry about not winning.Lawyer here. As others have said, some lawyers simply won't take the case if ...
Why does (liquid) medicine have to taste so bad?
I guess if it tasted good, there would be a load of kids drinking it because of the taste and overdosing?', "Most medicines don't taste good naturally, and adding things to it for flavoring would cost more. Cherry is used as a common flavoring for a couple of reasons; first it's fairly cheap, and second it's flavor pro...
How do cell phones connect to cell towers that are far away?
It's really not going all that far, especially if you're in a major city. From where I'm sitting at right now, there's 2 TMobile towers within 2 miles . There's about 25 towers that service the entire Las Vegas metropolitan area for T-Mobile. There's other towers for Sprint, ATT, Verizon, etc.The tower has a very large...
What are the limits, or checks and balances in place, regarding presidential executive orders? Also, what are some of the most extreme examples of its usage in US history?
1: The office of the executive has no control over the purse. Ya they submit a budget request, but congress can chuck that out and write a completely different budget if they want. This means congress can go "oh you want to do what?" That gets a budget of 0 dollars! 2: Executive orders do not create law, rather they di...
What is a "nominee company" operated by a law firm?
> Company formed by a bank or other fiduciary organization to hold and administer securities or other assets as a custodian on behalf of an actual owner under a custodial agreement. Basically an organization formed to control assets on behalf of their true owner. So rather than saying "Bob, take care of this money. Ple...
The Seth Rich Story and what went down
Seth Rich was an employee of the Democratic National Committee, which is the top governing body of the USA's Democratic Party. In July of 2016, Rich was apparently assaulted and shot in an alleyway in Washington DC. He was found by police and transported to a nearby hospital, where he died. The murder is still under in...
What is the genetic significance of humans being either left-handed or right-handed?
Here's a theory I've grown to favor: A large majority of humans are right-hand dominant. The right side of the body is controlled by the left side of the brain. It also happens that the left side of the brain is typically the 'hotspot' for language production in humans, even in people who are left-hand dominant . It se...
how much sun would I need to die of Vitamin D poisoning?
You wouldn't die of vitamin D poisoning, because your body would stop producing it. Vitamin D actually requires 3 different organs for synthesis: the skin, the liver and the kidneys. The skin synthesizes an inactive form of Vitamin D and then the liver and kidneys modify Vitamin D to produce the active form. Your body ...
Why police/investigators seek motives in solving a crime?
Finding the person who committed a crime is a process of elimination. You start with 7 billion possible suspects, and try to whittle that down to the one who did it. People rarely commit crimes completely at random. Understanding who had a motive to commit the crime is a useful tool for finding the people who were resp...
Why do old glass bottles which have been underground for a long period of time go rainbow?
The effect is called iridescence. It's caused by a chemical reaction on the surface of the glass by the compounds in certain soils similar to how rust develops from the oxidization of iron. It can be removed through buffing if desired.I would guess that this is a delamination effect - ultrathin layers of glass separati...
What is the difference with Wines from Australia/Africa/France etc
Yes the ground the grapes are grown give them distinct flavors, and is of extreme importance to a winemaker. Even the same grape grown from one side of a vineyard or the other could have slightly different flavors.How to explain booze to a 5 year old It's like the difference between Kraft Peanut Butter and Skippy Peanu...
Why do we have to have different currencies?
Countries have a degree of control over their currencies, like how much money they print and where their central banks set interest rates. They use that control to match their fiscal policies with current economic conditions. Countries that share a currency have to have the same fiscal policies, and if one is having di...
how come when I twist my cup the ice stays in place?
there's very little friction on it to make it move", 'The sides of the container impart very little friction on the water which in turn imparts very little friction on the ice.Imagine you've got an empty cup with no bottom and ice in the middle, not touching the side. If you twist the cup, the ice won't move because no...
How does China's Great Firewall work?
Not sure if this totally answers your question, but here goes: 1. All Internet connection provided in China is provided by the same "company". Imagine if everybody in the US only got internet from Comcast and there were no competitors. 2. The basic idea of the internet is little packets of information being sent and re...
How Putin has been in power in Russia for 15 years.
The Russian constitution lets someone to be President only twice in a row, but there's no limit on the number of times they can be President overall. After someone else takes a turn they can run for President again. Putin was President twice, from 2000 to 2004 and 2004 to 2008, and then endorsed his buddy Dmitry Medved...
How did people find out how you make maple syrup?
They first discovered the sap was edible and good either from observing bugs eating it, or chopping the tree down for use and discovering the sap. From there it is just experimentation on how to tap the trees without killing itNative Americans likely learned from bugs. Boring beetles dig into the tree and sap leaks out...
The Controversy Behind Viruses Being Living/NonLiving
I'm not aware of it being a controversy. They don't have cells or metabolisms. These are commonly considered part of the definition of "being alive," if one agrees with that definition then viruses aren't alive. But there's no inherent \'life\' quality we can just objectively detect or not detect, so the precise defini...
Does a black background on your mobile use less battery life than a bright one?
It depends what display you have. An LCD display works by polarising light which is sent through different filters. For an LCD display the backlight is always on, black areas are made by polarising the light in such a way that it cannot pass through a polarising filter, but the backlight is still on = > you are still u...
Why have there been plenty of first person shooter games that portray Germans and Russians as antagonists, but there are no games where the Israelis are antagonists?
As most videogames are made in the US and the UK, Germans and Russians are easy choices for villains due to their history of being antagonists to the US and UK within the last 100 years. Modern video games now include such antagonists as North Koreans and Middle Eastern people, the most recent antagonists of the US/UKB...
Why is the Satan considered evil when he killed 10 people in the bible, compared to the 3,000,000+ killed by god?
Going by bible logic, God doesn't consider death in this life as that bad a thing. If you go to heaven for an infinite amount of time, who cares how long you spent here? The devil is considered evil because he allowed sin to enter the world.
What is a Raspberry Pi and why is it so good at, whtever it does?
It's a small computer. The latest version has 1GB RAM, wifi, ethernet, sound output, USB ports and HDMI. It's tiny and costs about $40. It's good for whatever purposes benefit from a small, cheap computer. It won't really compete with a desktop or a laptop, but it you want to do something like hanging a screen somewher...
How does sunblock creams prevent your skin from getting burnt?
Pretty simply put, sunblock puts a shield over your skin to prevent the UV rays from reaching your body. It physically blocks it with a layer of different ingredients to keep you protected. Sunscreen on the other hand actually uses zinc oxide and titanium dioxide. It is a chemical reaction that absorbs uv rays before r...
Why do films in theatres look grainy and low-quality, even if the production value is really high?
Film is an analog medium, and therefore not perfect. Those are just simple imperfections. The black ovals are called ~~changeovers~~ cue marks. The projectionist watches for these marks. The first one warns that the change is coming up. I think it's something like a 5 second warning. When the actual changeover mark app...
Why is water either hot or cold when coming out of a shower (or tap)?
Because one pipe carries hot water from the water heater, and the other pipe carries regular 'cold' water, and the handle on the shower is a valve that allows for all hot, all cold, or mix the two
From an actual five year old, why is it when we lay on our arm for a long time, our arm doesn't die.
When your arm falls asleep from laying on it too long or whatever, it isn't actually blood flow being restricted , it's the pressing on the nerves, that's why it feels all tingly.We actually move in our sleep and these micro movements prevent injury. When the arm starts getting "tingly" we instinctively move, switch po...
why do oranges have slices?
Good information at AskScience: _URL_2_ The number of sections citrus fruits have is determined by the number of ovules the particular flower and fruit has. While ten is 'standard\' for oranges, they can have fewer or more. Navel oranges, for example, will have twice the number -- more or less. Source: _URL_0_ In seed ...
How does wearing glasses with the wrong prescription damage your eyes?
Wearing glasses with the wrong prescription or wearing glasses when you don't need them does NOT in any way damage your eyes or make your eyesight worse. At most you'll get a headache. This is just one of many medical myths that won't go away.