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When you turn a cup/bowl of water in your hand, why does the liquid inside seem to remain still while to cup turns?
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Think of the cup and water as two different objects. You are providing forces for the cup to move, buy you are not directly involved in the moving of the water. The water is moved by a coefficient of friction from the cup. As cups are usually quick smooth, the effect of friction is very low resulting in very little movement of the water. The basis for all of this is that "an object in motion will stay in motion unless acted upon by another force", similarly an object at rest will stay at rest. Since the cup and water are two different objects, the water will stay at rest unless friction can provide enough force to move it.I can answer by asking, why should it turn? In other words, what are the forces you are applying to the liquid that should make it turn. Newton's First Law is that matter at rest tends to stay at rest and matter in motion tends to stay in motion unless acted upon by a force. So when you have water in a bowl, its natural tendency is to stay as it is in the bowl . When you turn the bowl, your hands are applying force to the bowl, but the only force being applied to the water is the tiny amount of friction between the bowl and the water touching it. This friction is not very much, so the majority of the water in the bowl will stay as it was because no force has acted upon it.
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Why do we find B.O. unappealing if it's something that occurs naturally (and often while we're relatively clean)?
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I used to be friendly with a homeless guy who hung around outside a bar I used to frequent, and despite being homeless and looking the part, and not even setting foot inside the bar, he managed to go home with women like ALL the time. It was nuts. Some girl would step outside to smoke, or linger before leaving, and he would manage to strike up a conversation with her, charm her, and they 'd leave together. Sometimes this all took maybe 10 minutes, tops. I couldn't understand it. Finally, one night I asked him about it. He told me his "secret" is that he would stick his hands down his pants, rub his groin area, and then rub that scent onto his neck, and it worked as an aphrodisiac. When I expressed my disbelief , he reminded me that we're all animals, and no matter where he was, there was always going to be a steady supply of women who were at just the right point in their menstrual cycles as to make them extra available and legitimately receptive to the smell of his dickcheese. Crazy as it sounds, I saw him go home with a lot of women, so maybe there's something to it. All that is to say, I think we 've been conditioned by a cosmetics industry selling us fragrances to believe that our natural scents are unappealing. And I think that is rooted in wealth, or at least the illusion of it. If you don't have BO then I guess it isn't required of you to make much physical effort, which means you must be rich. But if society were to crumble and we all became cavemen again, I think we 'd find natural body odors more appealing again. Just ask Dickcheese the Homeless.
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What causes sleep paralysis in our brain?
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Not exactly this, but for a five-year old, this Imagine your brain shuts down some functions when you sleep. Your eyes are closed, you're not paying attention to the sounds your ears get, and your muscles get to go into total relax mode. Normally, everything turns back in in the right order and just in time. When you have sleep paralysis, those things are starting up out of order. Maybe your brain thinks all is well, but then gets weird messages from your not-yet-in muscles that make it seem like you can't move or are being held down. Maybe your eyes aren't open or not quite focusing right, but your brain expects they are, so it seems like you're blind or your eyes are covered. Maybe your ears aren't sending complete signals, but your brain tries to make sense anyway and maybe makes it seem like someone is there or you've been converted up. This could be caused by an unexpected jump from a deep sleep it dream state into a conscious state, which can be confusing no matter how it happens. After a little while things return to normal, but the ways our brains try to make sense of things make it seem like there was trouble. Sleep paralysis manifests itself in many ways, so yours may vary.
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In the US, how are judicial gag orders constitutional?
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The First Amendment is not an absolute right. It can be limited by law, but the government has to meet a certain level of judicial scrutiny to determine whether the law limiting the right is acceptable under the Constitution. Namely, things like this where the limitation on one's right to free speech is based on the content of that speech, the Courts apply a 'strict scrutiny' test, to see if the law is to be upheld. In order to be upheld under strict scrutiny, a law must be narrowly tailored to achieve a compelling government purpose. The government must show that there is no less restrictive means to achieve the compelling objective. In the case of a judicial gag order, the government's interest is quite clear: it wishes to protect the integrity of the judicial process, trade secrets, privacy, law enforcement or military operations, etc. The courts have determined that that is a sufficiently compelling government purpose, and that telling the jury they can't talk about it is the least restrictive way that the government can go about achieving that purpose.
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Why is everything so expensive in Australia and New Zealand?
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Prices are higher on nearly all islands. When you cut out the possibility of trucking and rail shipment, costs go up. While Australia and New Zealand have some natural resources, they have to import more items by plane and boat than non-island nations. Even on islands that have bridges to them, the route is typically longer because they the trucks/trains have to turn around and go back from where they came rather than continuing on to another destination. There is also something referred to as the "[Australia Tax]" in which companies charge more for products that don't cost anything to ship, but they charge more for them anyway because traditional goods do actually cost more to ship. This includes things like digital products .There are probably lots of reasons, but I don't think transportation costs explain it all. For one thing, we grow lots of food here but food is still more expensive in Australia and NZ than in a lot of other countries. Australia has one of the highest costs of living in the world but has high wages to match. I can't speak too much for those across the ditch, but one of the reasons things are relatively expensive in Australia is the adult minimum wage in Australia . We do have to pay a bit of a premium for transportation costs, not just to Australia from overseas but also within the country . We've also had a pretty good economic run since the recession in the early 1990s. We were nowhere near as affected by the economic downturn that affected many other countries in 2008-09. Unfortunately, one of the things that often accompanies economic growth is price inflation. The other thing affecting prices are exchange rates and the cost of living in different countries. There was a report recently saying that Australians pay AUD 1.12 for what people in the US can buy for USD 1.00.
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How do scientists know that Dark Energy makes up ~70% of the Universe if they don't know what it is?
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The universe is expanding. That is to say, all of the galaxies that we can see appear to be moving away from the point where they all started at the big bang. That makes sense. Big explosion, everything gets blasted away from the middle. But, since gravity means that matter attracts other matter, the galaxies should be slowing down slightly, as they all pull on each other. Instead, for some reason the galaxies are going away from each other faster and faster. Making galaxies go faster would take a LOT of energy, and we don't know where the hell this energy is coming from. That's dark energy. Exactly what that energy is is unclear. It might just be a law of physics we didn't understand, or a new fundamental force that's the opposite of gravity. But something is making everything accelerate, and whatever it is is the dark energy.
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Why do dogs react to human voices but not to speakers (phone, TV, music, radio, etc)?
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I hate to admit it but we still have a landline. The phone and voicemail are inside the basement stairway. When someone level a message our dog goes to the door and waits for that person to come out of the basement door. Our old dog would howl when she heard my wife leave messages on itDogs have great hearing. Some are easily able to distinguish real from reproduced voices because they do sound a bit different.
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What is a stroke, and what causes it.
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Your brain requires an immense amount of oxygen and energy to continue functioning. And it requires it nearly continually. A stroke is a blockage of the blood flow to the brain. This results in the parts of the brain that the blood is flowing to to become negatively affected. Usually this is on one side of the brain or the other, which is why you see unequal movement or strength in one side of the body. As blood flow continues to be restricted, brain damage can occur, which is why responding to a stroke quickly is so important. Don't forget FAST! FACE ARM SPEECH TIME There are a few other quick checks: Have them stick out their tongue straight forward. IS it uneven? If so, it's another sign. Also, you can have them cover one eye. If they say their vision is suddenly worse with one eye, it is another sign. Strokes don't just affect older people. I've lost two friends in the last year to cardiovascular disease, and both were under 40.A stroke is when part of your brain has no blood circulation. This causes parts of your brain to die. Strokes can be caused by blood clots or other blockages blocking off the way of the blood flow or even bleeding in the brain A stroke is a sudden interruption of blood flow to part of the brain. They can be caused by blood clots or other blockages such as embolisms. Some stokes can be caused by an aneurysm, which is the bursting of a blood vessel in the brain. This causes even worse problems and is usually fatal.
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How do bugs always get trapped inside ceiling light covers?
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I don't have proof for this but I read it in an article about mooths. Many insects tend to confound an artificial light source with the moon-light which they use for orientation. And once they get in the lamp-housing its hard to escape for them, just like a bee flying in your room through a tinted window and then not being able to escape it anymore.
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Why do pharmaceutical commercials always tell viewers to see their ad in a magazine? Do people seriously buy a magazine just to look at an advertisement?
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It's because they can't always fit all of the legally required fine print into the commercial -- side effects, warnings, etc. Take a look at a pharmaceutical ad in a magazine sometime, and you'll find that it's probably two pages, back-to-back: Pretty drug ad on the front, and page o\' text fine print on the back. And this is called "covering your ass." The advertisers don't expect people to run out and find the magazine ad, but once they 've told them too, they can say, "Well, we warned you "
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What happens to the brain when you get knocked out? What are the long term consequences?
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Generally speaking, a knockout is when your brain is rattled against the side of your skull. Hence why knockouts sometimes don't happen with the strongest punch, but with a moderate strength one placed right on the chin. The leverage is better at "whipping" your head around, causing the brain to slosh around in there and wack the inside of your skull. Long term consequences, esp. for someone who gets KO 'd a lot, but potentially even for much less, are [CTE]. KOs are esp. bad if a concussion results . But worth mentioning while in the same realm, they're separate things. Not all KOs result in concussions*. Not all concussions come from KOs. ***edit:** After posting I want to revisit this point. According to some definitions, a concussion is any loss of brain function due to blunt trauma, regardless of lasting damage or symptoms. In such a case, any blow that causes impairment, even just wobbly legs/seeing stars, with no last effects would be considered a concussion, albeit a mild one. And a KO would definitely be one. I'm definitely using more of a "sports" definition of concussion, which starts at one that results in some actual damage. There are KOs that don't result in any concussion like symptoms, whether immediately or well after the incident . Regardless of definition used though, any KO incident should be treated as if it were a significant concussion.
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Humans produce lots of body oils. Would they be good for anything if they could be harvested?
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This really should be how baby oil is made. From those especially oily babiesHow about as a replacement for fossil fuels? When you shower, a decent amount of body oil is washed down the drain, carried through a sewer and into a wastewater treatment plant. One of the first steps - Primary treatment - is a physical separation of wastewater components. Organic solids settle to the bottom and oil floats on top . Obviously, it's not just body oils - but also cooking oils, grease and other hydophobic substances that make up this floatable "scum" . Historically, this scum was processed in the same manner as all other biosolids. However, as fuel costs have risen significantly there has been interest in studying scum as a potential source for the production of biofuels. After all, it is a lipid/hydrocarbon rich stream, and since it is technically a waste product, it can be sourced from municipalities at a very low cost. You 've probably heard of people who run their cars on biodiesel sourced from used cooking oil from restaurants - well this is a very similar idea. Unfortunately, there are a few practical hurdles but there have been several studies and trials that have been quite promising. In fact, the Oceanside Water Pollution Control Plant in San Francisco has been effectively producing Biodiesel from their scum for the past couple years. I admit, body oils are only a small component of FOG in wastewater, but I still think the idea of powering a car from your oily skin is a pretty neat concept. There are a couple other articles on this [Here] and [Here's one about Oceanside]
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Why is it that human intelligence evolved so rapidly while other intelligent creatures like dolphins remained behind?
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Human intelligence hasn't changed much , but human knowledge has. The reason we have as much knowledge of the world as we do is our linguistic ability. Most of the knowledge an animal gains over its lifetime is lost when that animal dies because most animals have no way of communicating what they know to other animals. However, humans can convey complex ideas to each other through language so they are able to pass knowledge on from generation to generation. This way we are able to build on what we already know rather than having to start over each generation. The ability to record language also helped because then you could pass on knowledge to people you've never even met.The dolphins haven't "remained behind". They just don't talk to us.Well, what would a dolphin do with increased intelligence? They're underwater, so they can't harness fire. They don't have thumbs, so they can't construct complex tools. Even if they *could* construct complex tools, what would they use them for? They already do an exceptional job of catching fish, they don't need to build shelter to protect themselves from rain, and while they do have natural predators, a pod of dolphins is pretty effective at driving off a shark. They're as smart as they need to be, and no more. Being any smarter would just require more energy to maintain a larger brain.
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How is it that an event in a dream can make me feel real physical pain?
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Because pain is in the brain. Pain receptors feed back to your brain, where it interprets them as pain. If, in a dream, you get stabbed, then your brain thinks you got stabbed, so you feel the pain.
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When your body burns fat, where does it go?
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Converting the entire fat you have into energy would make you something like 10000 nuclear bombs. You certainly are not using that much energy. So your conclusion is right, it isn't being converted into energy like that. But chemical reactions evolve energy. Some bonds in your fat have higher energy , and chemical reactions in the body, convert them into more stable bonds . The difference in energy is what you get per molecule of fat . That small energy adds up over all atoms, generating the energy you have. The more stable compound is waste, and is thrown away from your body. Funny, how cruel nature is, taking profit from unstable species. P.S : I do not claim that the entire fat cell is chemically reacted, but the resultant energy is always the product of such chemical reactions.You can transform matter into energy and vice versa, but that's beside the point because that's not what's happening in a human body. Fat is a chemical compound that has a store of energy captured inside it in the form of chemical bonds between its constituent atoms. When this compound is reacted it transforms into other compounds , whose total chemical energy is less than the energy of the fat that was reacted. The difference in energies between the reactants and the product ) is the energy that can be extracted and used. This energy is what makes your muscles move and it's what keeps your body warm . So you're not converting matter into energy, you are changing one kind of matter into another and getting some energy out of it in the processIt gets broken down into fatty acids and glycerol. Your body can then use this to create glucose , or metabolize the fatty acids directly. You're correct that it doesn't get "converted" into energy. The molecules do get broken down, however, and that breaking down yields energy. Ultimately where the "waste" goes is your breath when you exhale carbon dioxideWhen you burn fat you dont really lose the fat cells they just shrink, And surprisingly most of the mass is breathed out
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Why are the Beatles so popular?
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I won't explain why they were popular in their day, as that it obvious. The reason they are still revered to this day is because of how innovative they were. Apart from being great songwriters, they were ceasless experimenters. Never making the same album twice. Remember that a pop band writing their own songs was just about unheard of in the early 1960s, let alone a pop band that wrote very good, and increasingly sophisticated music. In a few short years they went from writing songs like "I Want To Hold Your Hand" to "A Day In The Life". The Beatles were doing stuff in the studio that simply hadn't been heard from a band before. Things such using guitar feedback in a song, reversing audio tracks, experimenting with effects units, instruments, sounds etc. Incorporating different styles and genres in to their work, treating the record as an art form in itself, something with a beginning, middle and end, not just a medium for the conveyance of songs. As a result they were very influential on how a rock band functioned. No longer were bands viewed as commodities but as artists in their own right. Bands like Pink Floyd and Led Zeppelin could not have existed without the Beatles blazing the trail. That is the reason they are treated with such reverence. That and the fact that they wrote some pretty good songs as well.
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What is new electronics smell?
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There really isn't a single answer for this as it depends completely on the product. With that said, most likely what you are smelling is the chemicals used to clean the circuit boards and such to prepare them for use. As the item warms up you are probably also smelling any remaining flux or chemicals being cooked off.
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Why do we tune out smells?
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I think it's a predatory thing, new smells means something new is arise and we should be alert. If nothing smells new, then we cool.
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How come there can be a thriving porn industry when there's an almost infinite amount of free porn? (Not that I would know)
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A lot of that free porn is ripped from the paid porn sites. Logically, there are a lot of people out there who still pay for porn, either because they are suspicious of free porn or because they want to support the porn they like.
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Can animals tell apart reality from their dreams?
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I learned from Stephen LaBerge that, from an evolution standpoint, the reason we have a hard time remembering our dreams is so that we don't get them confused with reality.
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How do Large Bubbles Form on Potato Chips?
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There is an air pocket that expands during the frying of the chip. However it does not expand enough to break the elasticity of the potato creating a bubble that solidifies when the starches cool down.
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How can I swat a fly with all my might, yet it still comes back to annoy me?
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You are using the wrong technique, boy. Might will not rid you of the fly. You need speed, agility and intelligence. You don't need to crush the fly, you need to capture him. Flies are not smart, surely you can think better than him. Use your brain, not just your muscles, boy, and catch the fly.Because its near impossible to generate enough momentum to damage a fly with your might while it is in the air. The fly is so light that it is just displaced by your might, instead of being damaged by it. You are essentially pushing it somewhere else in space instead of punching it1. the fly sees your hand coming and moves2. the air pressure even helps to move the fly out of the way Proper technique:1. wait for fly to land2. calmly position hands 6-10 inches apart above fly3. clap
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When is a plant considered officially dead?
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I don't know that there is any official legal or technical declaration of plant death which is consistently followed. Usually individuals will consider a plant to be dead when as a whole it isn't able to recover from its current state even if some clippings may be viable.
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How come when the Reddit servers are down, they can still provide the Failure message?
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The server in question is most likely the database server. When you access a page, reddit's web server needs to ask the database for the data. The database has a limited number of available connections, so if too many are currently in progress, it will refuse more connections. The web server will then get an error message from the database, and will return a simple error page to the user.ELI5: showing an error page is many times less work and easier than showing a regular reddit page, mainly because the error page is always the same for every user. So even if there are big problems with reddit, the servers usually can still be switched to show only an error page; there might even be one who does only that kind of work and is therefore simpler and less likely to break. ELI25: A big site such as reddit doesn't just have "servers" that all do the same thing, but layers of specialized servers. The first layer is the loadbalancer whose job it is to know which of the servers behind it are working and forward requests to those that are least occupied at any given time. When the loadbalancer know that all the other servers are broken/down/overloaded, it will instead just show the error page, or forward the request to servers dedicated to that kind of static conent I don't know how reddit does it exactly because I don't work for reddit. But I think the sensible thing to do when dealing with high traffic is to block all traffic if there is too much and rout the traffic to a simple page . Once traffic goes down a bit the main servers allow new connections. This to prevent actual server issues which are a lot more time consuming to resolve. TL:DR Servers "going down" don't really go down. They just block traffic and show message until they can cope again with the numbers.
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How does anonymous hack into websites and how are they structured if they are all completely anonymous?
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'Anonymous' isn't really a single group, it's a generic identity for 'hacktivists'. Anybody can claim to belong, and people that don't claim to belong might get lumped in with them anyway. How one can crack into any website or network is a lot like asking how someone can break into a building: there's a huge collection of ways, and not all of them would work on all targets. Indeed often it's more varied in the computer security world because very often it takes a string of security breaches before the hacker gets what they're looking for. The generic answer is they exploit security flaws they find. There exist companies and freelancers that do 'whitehat' hacking on contract and tell you about the flaws they find without exploiting them as a service, but many, many companies are pretty lax about their security and never bother with security audits or the like.
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How do medical examiners/other forensic analysts determine the time frame in which a person died?
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The liver cools at a fairly constant rate, as it is so well insulated within the body, so they measure the temperature of the liver and the ambient temperature of the room, and from these numbers they can estimate a time of death. This only works if it was a recent death, for longer times they have to take into account decomposition, and their estimates are far less accurate.
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One Degree of Separation for movie making
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It means always making sure every scene is directly connected to the main plot line and main character. It is a way to trim extra fluff and bullshit from your movie.
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Why can't we do brain transplants like other organs?
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When we transplant other organs, we mainly have to reconnect tubes . If we were to replace the brain, we need to reconnect the nerves which we don't know how to do on such a large scale. At least that is my current understanding.The brain is the most complex organ in the body. It takes years for it to develop uniquely for the individual body. A huge part of this development is for the central nervous system, which takes 20 years to develop. Even with our technology, it would be impossible to rewire it perfectlyMost organs work like pieces of machinery much like parts of the engine in a car; kidneys, stomach, intestines, liver all have relatively simple job to do. The brain is the hive mind of all these, it is connected to everything and controls everything and it also houses who you are, much like the driver of a car. So it is much harder to replace the controller rather than the individual partsIn the book Stiff They talk about this. Apparently, a brain transplant was performed with a monkey. Thing is, as sotek pointed out in another comment "When we transplant other organs, we mainly have to reconnect tubes " So when they transplanted this monkey brain, they didn't connect it to anything except the blood vessels in this other monkey. So it's kind of like plugging in a gaming system to a powersource and turning it on, but not connecting the monitor or the controls. The brain was "on" and alive, but no information was going in or out of it because all the nerves had been severed. They had an EEG connected to it, so they knew thoughts were being produced and the brain was still alive, there was just no way to know what exactly was going on. They suspected the monkey brain probably went insane with having no outside stimulation coming inI think what you mean is a **body** transplant.
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How can Comcast can charge me a ridiculous price for 30mbs internet but at best I get 3mbs down or up?
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Well I'm. Pretty sure you're paying for 30 MegaBits where as your download is MegaBytes . The mathematics and how it's measured or how that works is still beyond me and I'd like to know how those numbers correlate and what a megabit really is", 'Aside from the other answers, there's one more reason. It's in the disclaimers. "Actual speeds vary and are not guaranteed." Says that everywhere they promise a certain speed. It might run that way at peak hours under prime conditions , but actual speeds will vary depending on things like the amount of traffic on the network. Now, if you're consistently getting lower than rated speeds and it's not just the site , call them and complain. They may be able to reduce the cost you're paying, as I do believe they offer slower connections for cheaper than thatYou are paying for 30Mbps and getting download speeds of 3MBps. Basically, anything you download is in MB, not Mb, which is different by a factor of 8. 30/8=3.75, so 3.75MBps should be around your maximum speed. Accounting for other devices in your home taking up bandwidth and the limiting upload speeds from the servers you are downloading from, 3MBps is around what you should expect.
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Why do we remember some skills (e.g swimming and cycling) our whole lives?
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It's called procedural memory. More specifically, it's 'muscle memory' or 'motor learning' which is a type of procedural memory. Your brain's cerebellum, in particular, is very good at encoding sequences of muscle movements into long-term memory storage. Procedural memory is very robust. Even people with dementia and amnesia often still retain procedural memories for skills like playing a musical instrument or riding a bicycle without any conscious effort. Interestingly, for people with anterograde amnesia , it's still possible for them to learn new motor skills and encode them as procedural memories. In other words, you can have someone with anterograde amnesia learn to ride a bicycle for the first time in their life and each day you get them to ride they will have no recollection of ever riding before, but each day they will continue to get better and better at riding the bike.Relevant video: the Smarter Every Day guy shows a bicycle that is steered inverse of a normal bike and he learns, very slowly, how to use it .[video]This is slightly different but it is possible to unlearn how to ride a bike.This guy learns how to ride a bike that is rigged up so the wheel turns the opposite way to which you turn the handles. _URL_1_ If you watch this video one of the most interesting bits is towards the end where you can actually see his brain click and he can ride the normal bike again. 5min 50seconds for that partHaha, are you sure? I grew up swimming, in competition even, and last summer I decided to swim a lap and about drowned myself cause I had no idea how to breathe without sucking in waterYou don't "remember" them, exactly - it's more of a learned motor skill. Memories and skills are stored and saved by different parts of the brain. Your brain stores coordinated skills like walking, biking, swimming, permanently, and unless it's damaged, your brain doesn't dispose of this storage space. You may become less skilled at the ability, but you won't ever "forget" how to do it.
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why do only loans and credit cards show in your credit reports and not other types of accounts
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Information cannot show up on your credit report if it is not reported to the credit agency. If your utility company doesn't report payment history to, for example, Experian , then that information will not show up on your credit report. Most utility companies do not report this information to credit agencies. The Fair Credit Reporting Act mandates a few things about companies reporting your payment history. The two big ones that tend to present hurdles for utility companies are that 1.) payment history must be reported promptly, and it must be reported regularly; and 2.) discrepancies on the report must be settled in a timely manner. Most utility companies are either not able or not willing to meet those criteria, and so your payment history cannot be counted against your credit score. In the long run, this is actually intended to be better for the consumer.
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If Blue LEDs just have been invented (nobel price '14), how come my smartphone's notification LED can shine blue since a couple of years?
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The nobel price was awarded in 2014 for the discovery that happened about 20ish years agothey weren't invented "just now". [we know them for quite some time]. it was just delay between invention and noble prize, because it was proven that they are useful.
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Why do your allergies flare up when you wake up? I never recall being woken up from sneezing but as soon as I wake up it starts.
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When you are sleeping your body is producing antihistimine so it can function quietly whilst you sleep. Wake up and it allocates those hormones elsewhere.
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Are internet and cable ads confusing on purpose? Or are cable and internet companies just bad at their jobs.
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They are well thought and confusing on purpose:1) they don't want you to be able to compare their product to the competition. 2) they try to give a sense of urgency "buy now" even the product is on the shelves for a long time. They frequently create fake sales, fooling people into believing they get a great deal.3) they see that one fixed price has limitations. For example, a hotel that sold 50% of their occupancy. What will they do with the empty rooms? They gradually start reducing price in a way customers think they got a bargain. Same with cellphone carriers. They speak about deals, but in reality, they are all very much alike. Nobody is significantly cheaper than others.
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How are my headphones playing a "ghost station"?
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A nearby AM radio station is being picked up and rectified by the TV. A simple AM receiver can be made with a junction of two dissimilar metals or a metal needle point on a crystal. I suspect the electronics in the TV are performing the rectification and the headphone cable is the antenna.I have a couple of my own theories. 1) the audio from another input on the TV is leaking onto the audio jack channel. 2) the cable is acting as an antenna and picking up a radio station 3) I'm acting as an antenna and picking up a radio station ", 'Pirate radio yyarrr! This is actually normal and happens with low quality speakers. Essentially the wire in your headphones are not shielded well so they are acting as an antenna. They are able to pick up a certain AM frequency because of this. I actually was able to once get legitimate pirate music once from some old crappy speakers I had would wake me up at night.Somewhere in the headphone circuit there's a cheap half-bridge rectifier. The headphone extension is also unshielded, allowing it to act as an antenna. The AM radio signal is its own power. If the guilty circuit had used a **_FULL BRIDGE RECTIFIER_** ^^cough ^^cough ^^sorry or if the cord was properly shielded, you wouldn't pick up the station. Radio Shack used to sell ferrite donuts called Chokes to snap over cables to eat parasitised RF signals. ------------- ^
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How do interplanetary spacecraft (and in the future interstellar), protect against collisions with space debris?
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They don't and they don't need to. Space is incredibly big and empty. Despite how visuals like the one on the [Asteroid Belt Wikipedia article] makes it seem, the majority of the asteroids are very small and the distance between them is enormous. The odds of our probes to the outer planets hitting anything are astronomically slim and they have been flying directly through it without any collisions so far. Once you get out of the solar system into interstellar space the distances between things just becomes even larger.
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How is it possible for us to know if a sound comes from the top or the bottom given that we only have two ears aligned horizontally?
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The shape of your ears directs sound into your ear canals difforently based on the angle it comes in at. If you change the shape of your ears with something like play dough you lose this ablilty all togeather. Other animals like dogs aren't as good st this and so tilt their heads to get a better idea of what virtical angle the sound is coming from. Here is a great video by Smarter Every Day all about it: _URL_0_
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Why do we have morning wood, does females have something similar or not at all ?
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There are many factors. 1) Your body will give you a partial erection to help prevent you from emptying your bladder while you are asleep. 2) Your body goes through cycles that raise and lower your blood pressure while you sleep. These happen numerous times during the night and each time they happen you are likely to get a partial erection. 3) Contact on your genitals by clothing or bedding while you sleep can stimulate you enough to get an erection. 4) Erotic dreams can cause you to get an erection.We actually have several erections during the night with the last of those being the morning glory. Normally happens during REM sleep , but there's no consensus on why. One theory is that the bit of your brain responsible for your inhibitions turns off over night. Another is that it's a release of nitric oxide, which causes your blood vessels to dilate About the only thing that's agreed on is that consistently not having one is considered an issue. Women get them too, though it's less obvious ;)
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The formation of storms during the "Dust Bowl"
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A dust storm is formed when high velocity winds pick up loose sand and dirt of a flat surface and carries it over a distance. Besides the Dust Bowl, dust storms are very common in dry sandy areas and in deserts; a dust storm is the same thing as a sand storm, and they occur all the time. There wasn't a meteorological phenomena taking place during the Dust Bowl. High winds are quite common in the American prairies. In fact, dust storms still take place today. The reason why the Dust Bowl had plenty of storms was because, as you mentioned, the agricultural practices. If they're wasn't any agriculture in the area, there would have been less loose soil and dirt. To make things worse, there was a drought in the early 1930's. So, all the loose soil and dirt became really dry, and was easily picked up by the wind. TL/DR: To create a dust storm, you need heavy wind and a lot of dust. A combination of agriculture and drought created a ton of dust that was picked up by the naturally occurring wind.
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What is the difference between "Sell By", "Best By", "Use By"... etc. dates on food?
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Employer must sell this item by : dd/mm/yy ;This item is best consumed if by : dd/mm/yy ;Consumer should finish this item by : dd/mm/yy', "I reckon if you sort of recorded which things say what, you'd find different kinds of perishables say the different things. Perhaps things that are not safe to consume after a calculatable time, like milk, say 'use by', while other things may be very hard to tell how long it will last, and would say 'sell by' and just provide a less accurate, but safe date. Some beers will even say 'best after' to allow it to be sold before it reaches its most optimal state. Something complicated to do with left over yeast and sugar that happens after its bottled.
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How are built bases and platforms in the sea?
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The majority of offshore oil platforms actually float or are on "legs". [Here's the legs of one, being towed out to sea.] - in the case of these, footings or foundations on the sea bed - obviously its not that deep - are poured by highly skilled deep sea divers. One of the cool things about concrete is that - depending on the mix - yes, you can "pour" concrete under water and it sets. Although its possible that the "footings" are just level spots graded by a dredger if the bottom is sound enough . [Here's one that floats being transported.]. Once it gets to where its going, they fill the base and legs with sea-water to create ballast. There's enough air left in the legs to create bouyancy and it floats. They anchor the platform with either literal anchors, but more likely big blocks of concrete cast on land and then dropped where they need to be, and connected to the platform with cables. For bridges and stuff, your support structures have to be mounted to the sea floor. While "floating" bridges do exist, they tend to be temporary. Although [Norway is currently planning a "floating tunnel" across a fjord, where the tunnel is suspended by floating islands that ships can sail between.]*How are bases and platforms in the sea built? *How are the foundations of bases and naval platforms laid? *Is there a maximum depth that man can build? etc.
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Why do big companies care about geoblocking so much?
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It depends on the company I suppose. In many cases it has to do with marketing. If you are releasing products on a regional scale , then allowing your website, advertising, and other marketing to penetrate and build demand in a market where the product may not be released for months or years, is very counter productive. It will build popularity at a time when people cannot purchase the product, and when the product is finally released, it will be old news, the initial excitement having already passed. Other industries do it simply because that is the way they have done it in the past and are resistant to change . For other companies it may be an issue with keeping their brand at top quality. Changing a marketing campaign for other countries takes ALOT of work and time, which even when companies take the time to do it can still cause major issues. Simply releasing an unfinished product can do a lot more harm than good.
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With all the advancements in technology, how are there still places that have no service?
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Money and physics, mostly the former. It costs a pretty penny to build cell towers and expand the network, if you can't justify the cost to build it with the amount of income you'd get by new subscriptions covered by the new infrastructure, it won't be built. That is unless the government subsidizes the construction, which they have done in the past but people complain about it. From a physics perspective there are a few places where it's notoriously difficult to get service, like in a valley or in an extremely crowded cell. The solution is to build more cells, which brings you back to the point on money.Cellphones are not satellite phones. You have to put up a tower to have service within a certain radius, so the providers need to expect enough subscribers within that radius to make a profit above maintenance costs.
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If we used nuclear power for everything, how long until we run out? Could we get more uranium by then?
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Fissionable materials are infinite for all practical purposes. Uranium can be extracted from seawater in vast quantities because it comprises a significant portion of the Earth's crust.David Goodstein has written extensively about energy issues, particularly about Peak Oil. Here is an excerpt I found from an interview at American Scientist: > we should remember that nuclear fission energy is not a magic bullet that will solve the problem. The largest practical nuclear plant is roughly 1 gigawatt. It would take an almost unimaginable 10,000 of those to replace the 10 terawatts of fossil fuel we consume worldwide today. And then the known reserves of uranium would only last a *decade or two* at that burn rate. [emphasis added]. So, the answer to your question appears to be a few decades. There are other options for nuclear power, each with its own downside, but it does not appear current nuke technology can save us.
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If the Big Bang happened, what events preceded it?
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The honest answer is that we don't know. There are some conceptual ideas, but none with any evidence as of now. The after effects of big bang itself cuts us off from data gathering at a certain point, and going back any further than than the singularity is outside the realm of what we know as existence so we wouldn't even know what data to look for . Suggestion: A better way to ask this is "What is the origin of the singularity in the big bang and what caused it to expand?" Asking it that way will avoid people saying, "There was no \'before\' because time did not emerge until the big bang. " Most people know what you meant by your question, but some people are just difficult and don't answer what you mean, instead defer the question.If there was a cause at all, the only real answer right now is that we don't know what it was. There are some interesting hypotheses, such as the collision or intersection of objects in dimensions we can't see, but we don't have any way at the moment to investigate that.
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How are highway light pole bulbs changed?
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Tall hydraulic lifts with a guy in the basket. It really is that simple, they cone off the lane, the guy gets in his safety harness and gets lifted all the way up there in the basket with the new bulb. I knew a guy who collected street light bulbs, don't ask me why, he was a bit odd. But he showed me them and the bulbs are actually quite large and expensive.Highway lights are often done in a flagpole-style, where the lighting array is hoisted up and down through a pulley system within the main column. When a light needs to be changed, the crew just blocks traffic from the inside lane and they lower the array, swap out the big old bulb inside and hoist it back upThey are changed very late at night when traffic is minimal. Usually a lane is blocked by a large DOT truck while a crew in a boom truck works on the light.
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Why do scientists think space isn't spherical?
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First of all, we have to define some terms. Instead of spherical, it is more correct to say that something is positively curved . Hence, a sphere. A quick way to determine this is if the angles on a triangle drawn on the surface of the curvature add up to **more than 180 degrees**. Negatively curved space looks basically like a saddle. If you extend this infinitely then the edges don't actually ever meet up so it doesn't bound some finite zone. A quick way to determine this is if the angles of a triangle drawn on the surface of the curvature add up to **less than 180 degrees**. The last option is flat. That is, the triangle's angles add up to **exactly 180 degrees**. So, using the triangle idea, we measure incredibly huge triangles in space using known reference points like quasars. We have to use huge triangles because a sufficiently big sphere or saddle would look flat on a small scale. It turns out that, when you do those meaurements, the universe is flat to significantly less than 1%. That is, the angles of the triangle add to somewhere between 179.5 degrees and 180.5 degrees. That's it in a nutshell. This method works because space, on very large scales, is homogenous and isotropic. That is, it looks virtually the same no matter what direction and how far we look. So we can take those huge triangles and be pretty certain that what we're seeing is a good approximation of "everywhere".
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Why has China devalued its currency, and what will that mean for other countries?
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When your currency becomes stronger, it becomes much harder for you to export your country's goods, because your goods become more expensive for other countries. China doesn't want that because they are the biggest export nation that there is.
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Why do plastic bags make so much noise?
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Well as far as i know, its because the polymers are stretched and crystalized to make the bag cheap and sturdy. This makes it more resistant to physical manipulation and when you overcome the resistance when you change the shape, the energy is released as sound. **eli5: Sound is vibrations. Crumpling a plastic bag releases vibrations into the air.**I see a niche in the market for silent bagswhat a weird question. also weird is how I never wondered that myselfWhen you knock on the door, why does it make sound? Because your knuckles collide with the door and the collision produces a lot of energy. < < The "why" of this deserves another question altogether. Plastic is rigid. Just like door. Well not exactly like door, but if you zoom in really really really closely, you'll find out that there are lots and lots of small doors all sorta hinged together that make up the entire fabric . Now when you move about their orientation, they knock on each other and make clicks Does it have anything to do with the bonds releasing the sounds?or I wanna know whats going on the molecular level? do the bonds bending release the sound?
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How do human crushes even happen?
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You're thinking about it from the perspective of the people at the front, not the people at the back. When the people at the front reach a barrier, they stop. Seems simple. You would expect the people behind them to stop too. The people behind them will stop, and so will the people behind ***them***. But then you get to 100 rows back, and the people back there have no idea why the crowd has stopped moving. All they know is that they want to move forward and the people in front of them have stopped. They see a small gap in front of them and try to squeeze into it to get further forward. Multiply this by 1000 and you've got a huge force pushing against the people at the front. People at the front are dying and those at the back are completely unaware that there is a problem.
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How they determine the length of time to wait between airing a movie in theaters, and premiering it on TV.
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I say once they 've felt they 've squeezed as much money as they can out of dvd sales from rentals and purchases. Most likely they wait til after after a holiday event where they know they'll get alot of sales. Also, It won't go on tv unless someone wants it. If someone wants it the "industry" again get paid for licensing out the movieWe are currently in negotiations on a distribution deal for my movie. Each release window is part of an overall strategy, on a case by case basis. A distributor will negotiate with theaters, pay TV, VOD, DVD, broadcast TV, and other venues . And then the release strategy is devised, considering other factors. Genre, cast popularity, the calender , like MPAA rating, popularity at festivals, and on and on. And all of these factors are considered for all the territories around the world, coordinating with the different priorities of the cultures there, the sales agents for domestic and foreign, the filmmakers, and their future plans. For example, we are looking to protect our "brand," and continue our careers. Building a reputation might be easier with the same sales agents , so we can plan a DVD release of movie #1 just as we're going to market with movie #2 for exampleFrom what I understand there is no easy way of determining when they will release. Sometimes they will wait until a few months before the sequel to keep people invested. Other times if it is a holiday movie, they will wait until that holiday is close. Still other times they may just wait until the Christmas shopping season. It all depends basically and when they think they will be getting the most salesMovies that make a lot will be left in theaters longer, then released on DVD and when DVD sales start slipping they allow it to be shown on network.
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About health insurance, what happens when you reach the age of 26?
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Obamacare made it possible to keep your health insurance if you're insured under your parent's plan until you're 26 years of age . After you turn 26 you will no longer have insurance unless you've obtained a plan through your own employer/institution/whatever. Let's say you had a stable career by age 24, and that employer provided you with healthcare benefits, you would no longer need to be insured under your parent's plan: you'd have your own. Basically your parents are telling you that if you want to receive healthcare when you're 26, you need to find some way to get your own insurance. Finding a job that provides good benefits is the way to do it. ETA: It's never free, though. It comes out of your paycheck.Most of the time it's not "free" anymore, although companies tend to still pay the vast majority of the premium. If you really want to bum around all day you might qualify for Medicaid, the government insurance for poor people, or if you have some money from mowing lawns and whatnot you can buy a subsidized policy on the Obamacare "exchanges".
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How the "feels like" measurement of the temperature is taken?
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They take measurements of the humidity, wind speed, and temperature, then they put them into a formula and they get roughly what it will feel like. The formula and some more information about it are available [here]. I guess I could have copy-pasted it, but I'm too lazy.
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Why do people KEEP pressing the button in /r/button. Is it reward gratification or some other motivation
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People want to push it as close to zero as possible to get the rarest color. Take heart though, you had to be registered by April 1st to press it, so eventually there won't be anyone else to press it and we'll all be disappointed at the outcome together.
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why is my earliest memory not from birth or a little after birth?
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Your brain is not finished developing until further age. By the time of your birth your brain still lack the cognitive ability to store memories. It is not until further age you get some of the brain abilities that might seem obvious to you now. You should watch this video about [cognitive development among children] - Its quite interesting.It's a thing called [childhood amnesia]. Basically, your brain hadn't developed to the point where it could encode long-term memories for you to access as an adult.
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How come I get pimples everywhere except on my hands or feet?
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Pimples are caused by sebaceous glands, which produce an oil-type substance to coat our hair follicles . The skin of our palms and soles are special. The epidermis of the rest of the body has only four layers, and also has lots of hair follicles . The epidermis on the palms and soles have five layers and have no hair .
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How does unemployment insurance work?
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So unemployment is basically a pot of money funded by the federal and state unemployment taxes that businesses pay. The more workers a business has file for unemployment, the higher their unemployment tax rate. You don't have to contact the employer at all - the state will do that part. The rules for whether you qualify to receive unemployment benefits vary by state. You'll need to contact your local unemployment office to find out if you qualify. A voluntary quit scenario is generally harder to get approved , so you'll want to gather any supporting documentation you had
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What is the difference between an originalist interpretation and a "living document" interpretation when it comes to the U.S. Supreme Court?
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The idea is a debate about whether the founders wrote the thing to be specific, rigid, and amendable only through the amendment process or whether the founders wrote the thing with deliberately looser language to take shifting societal norms into account. For example, the 8th amendment prohibits "cruel and unusual" punishments but neglects to define those terms. An originalist would argue that we need to research what "cruel and unusual" meant to the founders. A proponent of living document theory would argue that "cruel and unusual" is deliberately vague so that the boundaries of cruel and unusual can shift as society progresses.
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Why are the players more prone to breaking out into fights in some sports compared to others?
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Certain sports are more 'aggressive' than others When the sport is physically demanding where the opponents are, in a sense, battling each other , then the aggression level of the players is heighten as if they are in war or predator vs pray…this makes the players more prone to fight where as a physically demanding endurance sport like cycling is the opposite – the endurance sport is a race from point A to B, not combative.
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How does doing more exercise give you more energy?
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Energy the body produces isn't a "static pool" that is only filled with so much water. It's like a big reservoir with an input valve and an electricity-producing hydroelectric dam , and discharge shoots for the exiting water . When you exercise, you're tuning up that hydroelectric dam. The body is getting into a mode where it is realizing "hey I have work to do here! I better maintain my energy production facility", so it knocks the rust off of the old turbines and maybe throws some new ones in there too . All that tuning and extra capacity creates more available energy during the times when you're not working outThere's a difference between energy and "energy". "Energy" refers to how you feel because ultimately, we live in our minds. Exercising has various benefits such as increased serotonin which will make you feel better. Energy is created by mitochondria, the powerhouse of the cell. The mitochondria breaks down nutrients and this chemical reaction produces energy which is used by your body to stay alive and do shit.
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Why do most US schools have children get up before the crack of dawn to go to school?
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The American workday is typically 9-5, and parents need to get their children fed/clothed/etc and on the bus or dropped off and still able to get to work on time.Couple reasons. One, they re-use bus fleets, so they can't have all the levels of school start at the same time. Two, most parents have to be at work by 9, and therefore need to have their kids off to school well before then.Because schools are not designed to maximize learning, they are designed as a baby sitting convenience so that both parents can workWhen I was a kid, school started at 8, which is hardly "the crack of dawn," though I would have loved a noon-ish start time.From what I've learned, the American education system works like when America was still a farming nation. School starts at the crack of dawn because that's when the day started for farmers, and they'd get out around 1-3 so they could get home and help on said farm.I got up at 6:45 in high school. Not that bad', "What parts of America are you referring to here? I'm not sure, but if there is a long distance between home and school, then they may get up earlier to allow for travel time. Or, they may have other duties/chores to do before leaving in the morning. I think those raised on farms in the bread basket [Indiana or there abouts] would had to have done something for the animals/crops before leaving for school This is mostly speculation, but it might explain some of the reasons", 'No kid gets up at 4 to go to school. Put the crack pipe down.
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What does the discovery of the knee's anterolateral ligament mean for us, and why did it take so long to confirm it's existence?
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Seriously! How did we just now discover this? Wouldn't it be noticed during the countless autopsies performed?
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How do military aircraft intercept hijacked commercial planes?
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Former navy, we did flight ops with helos to intercept subs and track em. Intercept is kind of a blanket term. You can "intercept" the plane or boat and guide it to a destination of your choice but that is a gentle hand approach. Imagine two bouncers at a bar standing next to you you will prob listen if they are willing to beat your ass. This is especially true when you look at US policy for hijacked planes. Tldr: shoot that bitch down. [Source] If they don't comply I am unaware of any way to take over the air craft while it's in flight. The call then is to disable it risking casualties or destroy it. Maybe some one with pilot experience can weigh in.
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What are the rules for driving off-road in America?
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It is illegal to drive on other people's property without their permission. It is trespassing and could be destruction of property if you tear up the land or hurt crops. If you own the property you can drive as much as you want and you do not even need a license to do so. It can be illegal to drive on public lands outside of designated driving paths, but it is not always. You will have to check with the park. Pulling onto the shoulder of the road, or into the culvert if you have car trouble is expected, and often required in most States and you can get a ticket for failing to get your car safely off the road. There are many places that have parking areas that are basically just patches of dirt or open fields. It is generally only illegal to park here if you abandon the vehicle, park there without permission of the owner, or are in some ways impeding traffic. But overall it varies by State, county, and city so there can be a lot of variation. Edit: Also how can you have lived in a rural suburb? A suburb by definition is physically attached to a city so is far more urban that it is rural.
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Why can light travel through some solids (e.g. water bottle) but not all?
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Some molecules have a tendency to crystal structures: if you look at a piece of material very closely , you can see that the molecules form repetitive, organised structures. A famous example of this is [diamond] . In the picture, you can see the pattern that is repeated millions of times in all 3 directions, which eventually creates a touchable diamond. Some molecules tend to form a strucure that is essentially one gigantic crystal strucure . Because all the atoms are very nicele ordened in a pattern, photons can often fly through whithout boucing off an atom.y A polycristalline structure is also possible. This can occur when the same type of atoms 'decide' to form clusters of different crystal structures, or because there are different atoms with different structures etc. In this case it is sometimes possible that the materials are still semi-transparent, but in e.g. metals light cannot pass through. Materials can also be amorphous, which means the material is just a mish-mash of unordened atoms. In this case, light cannot pass through the material . Light bouncing through will always hit an atom after a small distance. An example of this is silicon. You can compare the photons to a straight flying football going through a stll-standing batallion of soldiers in formation vs. going through the mass at times square during New Year's Eve. **TL;DR**: Sometimes atoms are nicely ordened which makes it easy for photons to pass trough the material. **SOURCE**: I have a material science course. **EDIT**: spelling
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Why isn't charging the mound in baseball considered assault?
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It's assumption of the risk. You, by playing baseball, consent to all of the risks inherent in the game. One of those things is fighting that may happen from time to time.
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How did tithing come to be a requirement for members of the church?
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Tithing goes back to the earliest days of Judaism ). However, in the earliest Christian church records, the church appears much more like a [commune] where there were few things held individually. The earliest mention of giving a tithe by a Christian is [Cyprian] who lived from 200 to 258, and argued that too many Christians were not giving 10% but were increasing their wealth. By the 6th century it was part of [Church law], and by the 8th enforced by secular lawIt is part of Jewish law, and is implied, but not specifically stated in the New Testament. It later became explicit church law, and sometimes even enforced by secular law.
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Why do stovetops measure temps from LO-HI (with numbers) instead of temps?
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The temperature of your cooking element doesn't really give you an indication of your food's temperature. Just because I set my stove to 200 degrees doesn't mean that the food is 200 degrees. Why not just use a food thermometer like everyone?
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Why are we able to see shockwaves?
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refraction changes in air density act like lenses made out of air more or less the same effect can be observed over candles, only there it is hot air and not compressed airThe low pressure portion of the wave will cause the temperature to go down. The lower temperature will cause water vapor to condense into water droplets.
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Why is it unwise for a lawyer to represent himself/herself after being arrested?
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Well, because you are emotionally invested. It is basically the same principle why a doctor shouldn't tread his own family. As a party of this investigation / conflict, you are bias, you have your own opinion that is not necessarily reflected by law, but by your own feelings toward the case. As such, it prevents you from really taking a step back and look at the case in whole, keeping your mind clear to analyse it as a professional.
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How do old animated films get digitally remastered to make them HD? ie: old Disney movies.
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They were always well beyond HD. Do you think the version that was sent to theaters back in the day was equivalent to SD? It was on a film reel that was even higher effective resolution than 4K for the most part. The film master is put through a scanner that saves the movie in a digital format. We have much better scanners now, and we still have the film master. You just gotta rescan it.
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how are movies like the Parent Trap made when one actor plays multiple roles and their faces are seen together in the same shot?
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One way of doing it is to shoot the scene twice without moving the camera. The first time, they shoot the scene when the actor plays the first role, the second time the second role. These two versions of the scene are then blended over each other. Another version uses blue-screen in which one of the takes are shot in front of a blue canvas , which is then replaced by a real background. In these cases, the actor never touches the other character because it's, well, impossible. There is, however, techniques that allow this. One way is to compose the picture in a way that cuts the arm , and another actor is touching the character. The blend-over scene fades out the fact that there's just a "magic hand" there.
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How does someone like 50 Cent go broke?
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As /u/Dieniekes pointed out the other day in another thread he isn't exactly broke, he filed for Chapter 11 bankruptcy and not the common Chapter 7. > This filing buys him the time he wants/needs to pay his debts. He's not "bankrupt" in the typical usage of the term.He's filing chapter 11 bankruptcy; this is not bankruptcy as most citizens know it. The bankruptcy that most people know is Chapter 7 bankruptcy and is a total reset where you are left with no assets and no debts. > Chapter 11 bankruptcy is typically known as a "restructuring" bankruptcy. Given the lawsuits they quote in the article, I would assume he does not have immediate access to the liquid assets necessary to pay his immediate debts. This filing is to protect his investments while his financial team develops the most appropriate plan to pay his lawsuit debts. Paying $20mm is not an emergency for someone worth $500mm; paying $20mm in the next 30 days for most people of significant wealth is an emergency--most of their wealth is in investments. Think Zuckerberg here Net worth of ~40 billion. 24 billion of that is in Facebook stock. It's not easy to free up mass units of stock for their fair market value because selling off large units of stock tanks the stock value.
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Why do we sometimes flinch in our sleep?
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If im reading the question right and you are talking about that jerk right before you fall asleep. The theory behind it is that it's a basic instinct that we learned when were we less evolved than we are now. It was for when we slept in trees and we felt a falling motion we would be jerked awake to try and grab a branch to catch ourselves before we hit the ground and got hurt. And from the studies I saw this has even been recorded in infants you can watch lunge their arms/hands out as if they are reaching to catch themselves. So when we fall asleep our brain thinks we are literally falling so we get a basic instinct that kicks in to help us even though its just a false positive. Edit damn autocorrect
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What is the difference between fuel grades at gas station pumps? What do the more expensive ones provide?
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Higher grades of gas have a higher octane rating, which is important because octane is less volatile than cetane . High compression engines or forced induction require higher octane ratings to prevent the fuel igniting earlier in the cycle than it's supposed to ignite. For engines with lower compression, there's essentially no difference .
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Why are news headlines in the present tense and not past?
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It's all about conveying the sense of immediacy and urgency. When you read a headline it conveys the feeling that this is fresh news.Because the recent past is considered the present linguistically most of the time in English, and the News is primarily reporting of recent or ongoing eventsIn English and in french it is supposed to convey a sense of immediacy. Using the present tense will stress the urgency and the importance of the matter. Interestingly enough, turkish, which used a totally different tense system based on the difference between witnessing and not witnessing an event, will not do that at all and use a tense called "story past".
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The Federal Reserve has kept interest rates low for several years to stimulate economic growth during the Recession. What benefits are there to them raising the rates ever if low rates strengthen the markets?
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Raising rates can prevent a boom or bubble, where previously cheap interest rates would allow people to borrow money cheaply on high risk speculationRaising rates slows inflation, which becomes an issue if rates are too low and the economy is doing well.
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Why does no other animal have their own language like humans?
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Some do, mostly whales and dolphins are thought to have some of the most complex languages other than humans. Bottlenosed Dolphins for example, have been shown to have "name clicks," sounds other dolphins use to get their attention. Human researchers have reproduced these sounds and can still get the same dolphins attention.
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Putting down animals in zoo
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Did you read the rest of the article? They explained exactly why they did it. They didn't have the money to relocate the animals, and the new animals they were getting would have killed the old animals -- euthanasia makes a little more sense than a zoo snuff show. It's more important to look at the population of the species as a whole than any one individual animal -- with regards to the species as a whole, the zoo was doing exactly what it should.
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Trademarks: How can there be a DC comics and a DC shoes?
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They're in two completely different lines of business. DC Comics isn't trying to sell shoes and DC Shoes isn't trying to sell comics, so there's not likely to be confusion between customers of the two companies. So if you wanted to trademark McDonald's and sell, say, cement, you could, but you couldn't sell food under that trademark. The key question is whether a consumer is likely to be confused and think that one XYZ company is affiliated with another. XYZ Widgets and XYZ Books aren't likely to be confused. XYZ Clothing and XYZ Lingerie probably would be.
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Why is international calling so much more expensive than domestic calling?
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Let us assume you have to send a note to your friend in another country. There is no postal service. So what you do is pass it to your friend who is travelling to the city to take it up. So your friend travels to the city and there he sees another friend who is in fact travelling to the other country your friend lives in. So when this person reaches the other country, what he does is gets one of his people travelling to the town your friend lives in to deliver the message. So now imagine if you have to pay a penny to each of those people who helped you out. Wouldn't this be more expensive than asking your friend to deliver it to someone in the city? Something similar happens in case of international calling. Your network does not have a presence throughout your country. So when you have to call another country, they connect your call to a network who links to a partner network in the other country who in turn pass it to your friend's network. Since this is business, each of them in the chain has to make money and there you have the expensive rates.
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Would there be any downside if it was daylight 24/7?
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We would turn into a copy of mercury. Baked in the sun with no water or life. Imagine the moon under a lamp hot enough to turn it to glass, or burn it down to the core/bare rock. Nothing good.You mean other than being slowly baked to a crisp by a lack of cooling time and having no use for those Night Moves you've been working on since 1982? Can't think of a thing.
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What do nurses actually do specifically? Why does it require an advanced degree?
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Nurses do pretty much everything. They are typically as knowledgeable as the doctors they "assist" and often perform the tests that doctors prescribe. Plus nurses need to be able to help patients, which requires knowing a great deal about medicine. New doctors out of school are usually advised to listen to their nurses. Odds are high they will know more than they do, even with their fancy degree.
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Why is stem-cell research so hated and funded so little?
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The controversy over stem cell research is essentially an extension of the debate over abortion--one source of stem cells for research are aborted fetuses. Naturally, people who oppose abortion are opposed to research methods that profit from it. The results and concept are not that controversial, just this particular source.
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Why sunglasses makes someone looking more charismatic/elegant/cool?
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Since not had any responses, a few reasons I would rationalise it down to: * Positive association - it's used in a lot of films/movies/books as a way of signalling that someone is cool. As a result it's now associated with coolness * Psychologically it might add a bit of 'mystery' to the person - you don't know where they are looking, you can't 'read' them as easily * At a basic level it can just hide tired/saggy eyes, thus lifting the face and making it look better
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Why can't we make batteries that hold dozens of small batteries, then make high amperage chargers to charge them in seconds?
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Batteries are made up of smaller batteries or cells. The problem is regardless how you make a battery, you need to deal with heat when charging a battery. The only way to overcome the problem is to spread the cells out further apart so what you have is a very large, low capacity battery. It's better to have a very dense small battery that takes longer to charge.
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Wouldn't one third of something go on forever?
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No. You've fallen into the trap of thinking that base 10 is the only way to measure things. We count in 10s because we have ten fingers. But imagine that humans had evolved with five fingers on one hand, and only four on the other. In that case we'd count in base 9, and then your question becomes simple to answer, as one-third is simple to calculate in base 9. In that kind of world nobody would cut out 3/10th of the pie, throw away 6/10th, and repeat the process with the remaining 1/10th, because it would be as pointless as us trying to cut something into 1/11th. A pie can be cut instantly into perfect thirds. It's only our numbering system that doesn't fall easily into perfect thirds. If we choose a different numbering system, thirds are perfectly sane, rational, and simple to create.
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Why do doctors have such bad hand writing?
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Here's my 2 cents from a med student's perspective. I've always found the handwriting thing strange. I personally think I have crappy handwriting, but compared to some of my classmates mine looks like a work of art. Any yet compared to others mine is horrible. I don't know if there is an actual explanation for it but I've heard many things tossed around and this is probably my favorite - we have to take so many notes in class that in order to keep up we don't worry about making the writing nice. After doing this for a couple of years we just get stuck with the bad handwriting. Now, I don't know how true it is any more because most of our notes are powerpoint handouts but its at least a theory. Also, to comment on the shorthand thing .. even after learning the shorthand some Dr's handwriting is still impossible to decipher.They don't, it's just they write in abbreviations, which can look strange to the uninitiated. So when the doctors write "Rx cipro 20 mg po tid wf" is read as "take Ciprofloxin twenty milligrams by mouth three times a day with food". If you know the abbreviations, reading is pretty simple.It's called [shorthand writing.] It's just faster for doctors to write dosages, drug names, and other info needed.
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Why do some things taste good to some people but bad to others?
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Basically taste buds differ in density in each person. This impacts how the brain reacts to taste. Each body is unique.
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How come when I poop my legs go numb, but I can sit at a desk or in a chair for hours with no problem?
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I'm not sure, but maybe you could carry out a control experiment by pooping at your desk. EDIT: Like, maybe the descending poop compresses a nerve. I was being serious, guys!", 'You should try pooping more than once every two weeksI think toilets are lower than chairs. Just a guessLess of your rear is being supported on a toilet seat than a normal chair. The seat concentrates body weight onto a relatively small area of the legs. That puts pressure on nerves and causes the numb legs.
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What causes some people to be more tolerant to extremely cold or hot temperatures?
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Some of it also has to do with what you are used to. Here's an anecdote I am from the frozen part of the northern midwest. In the winter, it rarely gets above 15 degrees F, and wind chills are often below zero. I lived in this area for 13 years before I went to college in the mid-south . During the first January I was down there, there was a light dusting of snow - not even measurable by our northern standards - and the temperature dipped down to about 35 degrees. I walked to class that morning in shorts and a sweatshirt because the warmth, to me, was glorious. I got about a hundred crazy-stares of people wearing snow pants, heavy coats, gloves, stocking caps, boots all kinds of stuff. It truly wasn't cold to me at all. Caveat: I was slightly overweight in college, though I know plenty of people around here that break out the spring/summer clothes the moment it hits 40 degrees.
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Why can't you tickle yourself successfully?
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A "tickle" is a pain response which is created by the brain when the nerve sensors receive unexpected stimulation, and it is generally impossible for you to do something unexpected to yourself, and thus normally you can't tickle yourselfWhat about the roof of your mouth? Lightly flick and rub your tongue around on the roof of your mouth and it tickles like a little robot ElmoThis was asked two months ago, and at other times. _URL_0_
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What's so special about the money printing process that can't be replicated?
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There are quite a few anti-counterfeiting measures for US money that make it hard to replicate bills at home. To start, bills are printed on paper that is about 25% linen and 75% cotton. You could obtain paper like that, but paper for bills also has tiny red and blue fibers embedded in it, which I don't think you can buy. There's also a security thread that has the currency amount printed on it and which glows red under UV light. On larger bills the treasury uses color shifting ink, which changes color depending on the angle you view it from. The treasury also uses microprinting, which is where some lines are printed in such small bits that they appear solid without magnification, but the tiny printed components can be seen when viewed under magnification. While it would theoretically be possible to replicate all the security features, it would take a lot of expensive machinery and a place to store it. Buying the machinery would probably raise some flags. And printing enough money to pay for the machinery would raise even more flags. What some small-time criminals do is take five dollar bills, use solvents to wipe all the ink off of them, and then use an inkjet to print them as $100 bills. This makes sure that the paper is the right type and will pass the pen test, but you still have issues with matching the exact colors, microprinting, and the security thread.In theory it is absolutely posible to replicate it but the government add many different steps that makes it very dificult to replicate. And even if you would suceed in backwards engineering how to do it, the combination of rigorus controls and hard sentences for falsifying mony makes it dificult to set up such a complex manufactory without getting busted or raising suspicion. Additionally it nowadays become less and less comon with cash transitions, especially for larger sums of money that you would raise suspicion if you say try to buy a car or a house in cash. And it is probably not worth the risk if you still only can use it for smaller purchases.
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Why don't girls go bald?
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Testosterone is the culprit which makes men go bald. One anti-baldness drug acts by decreasing the amount of available testosterone. Since women have less testosterone they don't go bald as often.
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with skyscrapers being built so high, is the air inside them pressurized? And what happens if a window is broken?
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No the air is not pressurized, some of those windows even open. You have to go significantly higher than the worlds tallest building to have pressure be an issue. Its not even an issue on most mountains. Cold is a lot more of an issue. But no they are fine.I don't think that any building reach a height of 1000 meter. But let's take that as a value. 1000 meter is the height of high hill and/or valley in mountain area . Last week-end I was hiking between 1000-2000 meter it's still accessible for everybody. With my little alpine experience I start feeling the lack of oxygen over 3000 meter . So there is no need to control air pressure in a skyscraper. The only reason why they lock the window is to prevent suicide
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Why does urinating feel different when you are sick?
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For a multitude of reasons, among them: + When sick your system is generating different chemicals from the immunologic system fight, which generate different contents, pH and even smell for your pee, the different contents and pH can irritate the urethra and be painful+ Your sensibility usually is higher due to the disease, so you can not only feel more intensively the urine pass, but also the above mentioned irritation+ Your urination frequency messes up due to the sickness and you end up going to the bathroom at unusual times, which can also feel different
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Why are they called "Checks?"
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As in a cheque? There have been suggestions that the word chek comes from ancient Pahlavi language which was used in the Achaemenid Empire in Persia. It may have spread from there to Arabic where saqq means a promise to pay a certain amount of money for delivered goods.I kinda thought that the word might have come from the word "Exchequer". Probably from the Parthian word "chek" that the Achaeminid Empire used to describe the same thingHmm, I don't know how helpful this is, but here are excerpts from the OED: > 2) A draft form having a counterfoil. Obs. > This was apparently the sense in which Tucker used checked paper . Cross Reference: > 1768: A. Tucker *Light of Nature* I. 621 "If I have an account with the Bank of England..if I have no checked paper along with me, I cannot draw for a single sixpence to buy me a little bread and cheese.") Which leads us to our modern use of the word "cheque": > 3a) A written order to a banker by a person having money in the banker's hands, directing him to pay, on presentation, to bearer or to a person named the sum of money stated therein . **ETA:* Okay, that doesn't actually explain anything, but it's still interesting . /u/TheSweetSnazzoo seems to have gotten this one!
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Explain Quantum Entanglement to me like I'm 5.
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When you flip a coin, you know that whenever you see a heads come up, the bottom of the coin is tails. Similarly, when you see a tails come up, the bottom of the coin is heads. Similar to how you know the two sides of a coin have opposite faces showing, physicists can make two particles that have opposite properties . We refer to these pairs of particles as "entangled" - they aren't free to take on any value they 'd like to. Just like the bottom of a coin can't be tails if the top is, the spin of one particle can't be clockwise if the other particle is spinning that way too.
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We've had photorealistic CGI in movies since the early 1990s ("Jurassic Park," etc). Why don't we have photorealistic video games yet?
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Video games have to render the image in real-time, since your input determines what the next frame has to look like. A movie, by contrast, can take as long as it needs to get the image quality up to photorealistic levels, taking hours for a single frame, because they only have to render everything onceEven with modern high-end machines the time it takes it pretty amazing. It took 10-15 hours to render a single vfx frame in Gravity. Improving that to 30+ frames per second is gonna take some big improvements in computing power.
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NBA Free Agency and the Salary Cap
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The NBA has a soft cap meaning that you can exceed the maximum salary under certain circumstances. If you go too far over you are penalized with a luxury tax. This page has a list of the exceptions _URL_0_ . These exceptions were created to help teams keep players year to year. A hard cap would cause more player movement, like in the NFL, and the NBA doesn't like this because there are so few players per team. The Amnesty provision was an exception created during the last CBA. It basically allows teams to get rid of one player without it counting against their cap. This can only be used one time and most teams have already used it.
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