Datasets:
Rahmaa
/
eli5_final

Dataset card Data Studio Files
xet
Community
query
stringlengths
8
249
answer
stringlengths
45
7.8k
The time travel paradox (or the hitler's death paradox)
You cannot time travel, it causes a paradox. In particular it would violate causality as in if you killed Hitler then he would never rise to the point where you need to go back and kill him, which means since you do not go back and kill him, he rises to the point you need to go back and kill him.
Why does coffee only taste bad at it's lukewarm state? But tastes amazing if it's at a more extreme temperature?
Good coffee tastes good hot, warm or cold.Shit coffee tastes ok when your taste buds don't work ie extreme temperatures.Actually just learned this in a nutrition course. Coffee and Tea get most of their flavor from a lot of different oils and compounds . One of the most notable of these solubles are Tannins. Tannins give coffee, tea, and even wine their bitter and sharp flavor. When these solubles are exposed to air they begin to oxidize which in ELI5 terms means they begin to lose flavor. When hot water is added, it pulls these solubles from the bean or leaf and dissolves them in the water, sort of "binding" the flavor to the water. However like I said above, when these solubles are exposed to air they begin to oxidize, so if your coffee sits out for a long time the flavors begin to dissipate over time.The best comparison I can make would be similar to how a battery holds charge. If you charge a battery and then use it right after full charge you'll get the most from it, however, if you leave the battery untouched for a couple days or even weeks it may have lost a fair amount of its \'charge\'.So in essence, its a mix between how the solubles that give coffee its flavor react with the elements in their environment around them over time.Hope this helps!This is more preferential. People who normally drink hot coffee may shudder when taking a sip of something that is supposed to be hot. Some, like myself, can tolerate and drink it hot or lukewarm: some only like cold or iced coffeeand why does it smell so good? i love the taste, but ohhh the smell is even better.
What exactly makes seawater salty?
There is salt naturally in the environment. Salt dissolves easily in water so any rain falling will wash it into the oceans via rivers. The sun evaporates water from the ocean but salt does not evaporate and so it's left behind. In other words, the water cycle of evaporation and rain acts to concentrate salt in the oceans.
Why is it bad to remove a flash drive without ejecting it first?
It's actually not really bad usually.But when its in the process of writing something on it and you interrupt it you can corrupt the data and the ultimate worst case scenario would be that the flash drives formatting would be f***ed up.
Is the color magenta a real color?
Does this mean there's such a thing as fake colors? Enlighten me please, because I have no idea what you're talking about.
What would be the effects of consuming equal anoumts of caffeine and alcohol at the same time?
Your senses would be deprived like you are drunk, but you would also have a lot of energy. Until you drink enough alcohol to pass out or both to vomit your guts out. They won't cancel each other out since it's depressing/upping different things. A chemical which counteracts alcohol/caffeine would cancel them. You would also urinate a huge amount.
Is buying a hybrid or electric car really good for the environment?
By the benchmarks of emissions and energy usage, hybrids and electric cars do in fact have a lower environmental impact than normal cars. There's a lot of articles that indicate otherwise, but the ideas expressed in those articles are largely based on two faulty sources, the Daily Mail and CNW Marketing, that do not stand up to scrutiny. EDIT: ~~I notice that I always get reflexively downvoted by people who don't believe me, which just goes to show the extent to which the misinformation has pervaded the discussion.~~ [Here's] a more comprehensive outline of the initial sources of the misinformation and their flaws, and a compilation of more quantitative evidence supporting my point. EDIT 2: Part of comment withdrawn
why are numbers on a Swahili clock pronounced as the opposite number?
They use standard clocks, but that's not actually how they tell time. Because they are at the equator, there's not much variation in the length of the day, so sunrise/sunset are roughly at the same time all year. Seven a.m. is one hour after sunrise, so they call it one in the morning. Six p.m is 12 hours after sunrise, so they call it 12 in the evening, and then the clocks starts over. Now, why they don't just set their clocks to tell time in the Swahili manner, I don't know
What is this greyish blob? have seen it on multiple computers when browsing reddit
It's just an image: _URL_0_ It's part of that subreddit's style.I think its a bit like the people on youtube making comments with a fake default profile image, with a bug over it. The goal is to make you believe its on your screen. Example : _URL_1_', "It is the background image for /r/creepy. Here it is on its own: _URL_2_ Not sure what the idea behind it is: it's like whoever did the stylesheet kinda forgot about it.I actually thought I had a smudge on my screen when I first saw it. So if it was made to troll people it has been successful at least once.
If President Obama is the head of the Executive branch, that is in charge of Law Enforcement, why hasn't he said anything about police brutality in the recent weeks suspects?
The executive branch is absolutely not in charge of law enforcement. That's the concern of each individual state. Also he had [this to say about Ferguson]
How do animals hibernate for so long?
I can answer the poop part of your question. Bears eat tons of grass prior to hibernation to form a butt plug. This keeps them from defecating. I'm sure other animals have a similar mechanism.
How does the modern economy work vs the previous and old systems where people traded goods for other goods, or used shells or beads?
[Try this]. Lots of commentators seem to like it.Economics works the same way as it always has. Money is just a medium of exchange. A convenience. But it has no intrinsic value. Economics works on supply and demand. Demand is anything that people value, for whatever reason. There was a stretch of 1,000 years or so when the global economy was driven by the frankincense trade. People spent large chunks of their pay on frankincense. It didn't matter how they paid, as long as their payment could be used to pay the caravan master, who paid the camel-feed guy and the frankincense farmer, who bought the pottery that was made by the original incense purchaser. A positive feed-back loop of economic growth. The economy, now and then, is sort of like an electrical grid. Money is the current in the wires. Until it's hooked-up to something that does something that people want? It's useless. Only when it changes hands does economic activity happen. Anything used for money is replaceable. Wipe it all out today? People still have wants. People still have demands. And other people can still meet those demands. Get them together? And then they haggle. Shells? Dollars? An IOU? A bag of frankincense? It doesn't matter. The economic activity is in the trade, not in the medium of trade.
M. Night Shyamalan's demise
He made ~2 good movies and then most of his later work was subpar. It happens sometimes, people get lucky and do amazing work a few times and then remain subpar the rest of their life. Also, another issue is that M. Night Shyamalan movies usually have a twist, which made his first movies interesting but after a while the twist style got old for most peopleHis first movie, The 6th Sense, was almost universally loved. I think he made a big mistake with his second movie, Unbreakable. I think it's a good movie, but he went with another "twist" at the end, and I feel like making two movies with a similar hook kind of pigeonholes you. After that, he was stuck between a rock and a hard place -- audiences perceived him as the "twist ending" director so he either lives up to that standard and makes movies that always have an twist at the end, or tells a story "straight" and people feel like they got ripped off. Even directors like Hitchcock, who tended to work within a single genre, tried to change up the hook each time. Off the top of my head, I can only think of a couple Hitchcocks that have anything close to a twist ending, and they were separated by plenty of time and films in-between. If he had directed a drama or action movie for his second and third films, ones without twist endings, and then made Unbreakable for his fourth, I think he 'd have a much better reputation.
Why people don't have any memories from the first 2 or so years of their life?
the brain doesn't actually develop the capacity to store long term memories till several years after birth. The brain goes through a lot of stages in life, becoming more complex and more structured, till around 22 years old.
Why do long jumpers do weird random seemingly pointless movements before they run and jump?
There's a certain technique for each jump. Jumpers have to count their steps, and how many of each type of step they have to take before the jump. Source: ran decathlon in high school
Do deaf people get rhyming? Do they have their own poetic patters based on how they experience language?
Iirc there is a similar thing to rhyming in asl. The meaning of signs depends on many things including hand shape and position in regards to body. So a sign that includes a certain shape signed over the chest could "rhyme" with a similar shape signed over the hip.I'll add a second question. Do they sign in their head as they think?", 'BSL guy here. Yes. We have rhyming BUT the type or rhyme depends on your level of understanding of the spoken word. To me "the cat on the mat" rhymes in spoken word but NOT signed as in sign it's "that cat on mat." and phone sign is the thumb next to the ear and little finger next to the mouth Same hand position but different locations in relation to the body.) So to me I can find something funny even if it isn't intended that way. A perfect example is the way politicians avoid "flappy hands" by "shaking" or "holding" their own hands. In BSL this can mean [friend] or [fuck] or roughly "fuck you friend"', "My girlfriend is deaf and she will do things to shorten conversion. Like if we are taking about a guy name Phillip she works with, instead of spelling out Philip with each letter she will do the sign for 'fill up' which is much easier but still 'sounds' the same. They do have nuances and little tricks and puns and play on words. I'm not sure if it is different based on how someone became deaf, and I've only been signing for about 3 years", 'I'm only a level 1 signer so I know very little compared to most other signers. But basically signing isn't like standard English, so a rhyming pattern for hearing would be different to the non-hearing. In sign you would say "name my alambbb, age mine 21". Not sure if this helps at all but a little info for you.
Sometimes people on TV say "is this a secure line?" Is this a real thing?
Usually in movies it means "Can you confirm the line you are calling from hasn't been tapped?" and this is fairly easy to verify if you're using a phone no one would expect you to use, like a random payphone. As several other redditors have pointed out, for a connection to be confirmed secure in the modern era , it's impossible to guarantee complete security without at least enabling encryption on both ends but there are plenty of free apps and VPN solutions that can do it.
What is a mail order bride?
There are organizations that provide matchmaking services between American men and women in countries with less opportunity. The stereotype is that the women come from Asian countries, but Russia also appears to be popular these days. The prospective groom chooses one or more women from a list, then corresponds with them. If they mutually decide to, she comes to visit the US and they can get married. He gets a wife; she gets the opportunity to get a legal entry to the USThe "mail" portion was back when most long distance communication was done through physical mail. You would have contact with a foreign person either directly or arranged through an agency by mail. The "order" part means you will pay for all the expenses of getting a visa, travel fees, and other expenses to get the foreign person to your own country. The "bride" part means you will marry them to which grants them citizenship or at least residency in your own country.
How do you properly warm up an engine?
There is more or less 2 phases to warming the engine. First, you should let your car idle 20-30 seconds. This ensure that the oil is travelling through the engine, lubricating it. After that, you can drive normally. Your engine is still not at optimal temperature, so DON'T push the car. Dont rev too high or floor it until the temperature rises. Just drive normally and the engine will heat up", 'The way I understand it is that most engine wear happens while the engine is cold. So by driving it it will reach operating temp faster.
when commercials say "Next 20 callers will receive..." How do they keep track of that?
They don't. It's just a ploy to trick people into calling immediately rather than thinking about it first.
Why aren't countries referred to by the native word for them by the other countries?
Many languages have sounds that other languages don't. It's why many people with the same first language have similar accents in a second language . If the sound or technique used for pronunciation of a particular word is foreign, it 'd be difficult for outsiders to say. On top of that, other languages can have different alphabets, or even different symbols altogether. Ex: 日本 is "Japan" in japanese, but do you, as a native english speaker, recognize that? How is it pronounced? It's just easier to give everything a name in a way that is easy for you to say/write.[The Straight Dope] explains it a bit if you don't mind reading the article.Have a look at the [Wikipedia page on exonyms].
How do chess players guesses how many turns are left to a match ?
Usually they aren't guessing -- they are actually playing out the best possible moves in their head, and seeing that in a certain number of moves someone will win.
how does the moon work?
It doesn't change shape. What is happening is that only half the Moon is illuminated by the Sun. As it orbits the Earth you can only see the entire half that is illuminated during a Full Moon, none during a New Moon and various amounts between those 2.
why all oil trading everywhere has to be done in US dollars
It is? Do you have a link? Are you sure the USD is not just used for pricing purposes because its the world's de-facto currency for international trade? *And before the Euro people jump down my throat on this that doesn't mean the USD is superior to anyone but it is also the go too currency for defining "how much something is worth" in an international scene.Because it makes trading markets way simpler when everything is quoted in the same units and you don't need to worry about currency exchange, and the USD is picked for historical reasons. If oil became big now, the Euro would have a decent change to unseat it, but the Euro didn't exist back then. Some countries like to talk about switching currencies just to piss off the Americans, but it's not really a big deal.Virtually ever commodity that is traded on a global market is priced using a standardized currency. The U.S. dollar has been a very stable currency for a very long time, which is advantageous when pricing a commodity for both simplicity of the marketplace, but also because it prevents people from trading _currencies_ via trading your commodity.
If the Constitution protects against double jeopardy, how can trials go an appellate court?
The process that happens in an appellate court or other higher court is not considered a separate trial, but rather a continuation of the original trial. What the appellate court tries to determine is whether the first court did a good job deciding the case, not if the defendant is guilty or not. The American Bar Association has a good explanation [here] .In what way would it violate the rule? Keep in mind that the *defendant* is the one who asks for the appeal; without the appeal, he is guilty, and the appeal can't actually convict him .
Why it's possible to stop breathing voluntary but not your heart beat?
Here's the real answer: Your diaphragm and intercostal muscles are under voluntary control. Your heart is an involuntary muscle. Your heart can also become denervated and still beat relatively fine. This is why people who are C2-3 quads don't die but need to go on ventilators. This is why heart transplants work.
how can movie trailers show clips of the movie, which I assume is finished, but not be shown for another year?
I assume you're talking about the Batman v Superman trailer. They've finished filming and probably finished editing too. They're advertising for the movie so early so people know it's coming. We probably won't get another trailer like this for at least 3 months but this early trailer just gets people excited. It lets people know in the back of their minds that a movie like this is coming rather than bombard people with 3 trailers when we're a few months before the movie.I believe the trailers are mapped out in advance so the effects can be prepared for the particular scenes they want to highlight. Often the effects you see in the trailer differ from the finished version because by the time the film premieres several more months of work have been done to polish things.
Is there a limit to the “sound quality” that our ears can hear? If so, will recordings ever reach that limit (or maybe even surpass it)?
We cannot hear sound above or below certain frequency limits. No matter how good the recording is at reproducing them, even if an electronic device can hear them, we cannot hear these notes.
Waiting for Godot, and why it's considered amazing
Waiting for Godot is a weird and meta play, but I'll give my take. Godot means "Little God" in French. So, the characters waiting for some form of savior character day after day for eternity. Meanwhile, they complain constantly about their situation or just passively accept it Neither character is doing anything to make their lives better, they just repeat variations of the same dialogue several times before going home and presumably repeating the process the next day. Needless to say, their savior never appears. The two primary characters are the "Everyman": they represent the average, everyday person in society. Sartre is criticizing both the bleak and apparently meaningless world we live in as well as our inability to do anything to improve it. I could try to explain a bit more, but that's the short and ELI5 version.
Why are some house flies loud and some silent?
This is a simple case of their genetics. Different sized flies, having different weights, require different amounts of lift to remain airborne. Depending on wingspan, and their strength, an insect will beat its wings at different rates. A butterfly, with large wings, will displace more air per beat, thus generating more lift. This demands more force, but must be done less often. Since the period of their wings' motion is below 20hz, and beyond the human hearing threshold, we cannot hear them fly. A housefly, on the other hand, displaces very little air per beat due to small wing surface areas. This, while not require a lot of force, must be done very often. Since they must beat their wings roughly 200 times a second, they produce an audible tone at a frequency of up to 1000hz. This changes depending on their flight, whether they are ascending, descending, or traveling laterally, as well as through the Doppler Effect, as they change position relative to the observer in significant time intervals.
How do home shopping tv channels like qvc and hsn stay in business?
Old people are their market. Old people hate computers and buying things they're not certain about. They see the product, and a smiling salesman, they don't have to read anything or search for it, they pick up that phone and say what they want. Edit: and if I had to guess, I'd say they don't mind paying a little more for the convenience of it.
How weather prediction works and why it requires massive computing power
We take the atmosphere and divide it into really large slabs - about 20km on both sides horizontally and about 1 km up. With each of these slabs there are some well understood equations around the amount of air that's going to flow into and out of each of the six sides. Unfortunately this movement depends on the pressure of the next door slab, which depends on the pressure of the next door slab, which depends on the pressure of the next door slab etc. etc. so to calculate how the air is going to move you need to know the air pressure in *all* of the others, and vice versa. There are two ways of solving this. Either you can form a massive piece of maths called a matrix equation and solve it. This takes giant quantities of computer power. Or you can take a guess as to how the air should move, see how wrong you were, and refine the guess until it's more or less right. This takes less giant quantities of computer power but is inaccurate. Arguably. How it works in practice is that the NOAA produce a huge world-wide model using very large slabs which they then give away. Local weather predictions are made by regarding this as "right", and running another huge calculation with much smaller bricks to see whether or not it's going to rain on your washingELI5: We know something about weather, but predicting weather is really really hard. So we just plug a bunch of stuff into a computer and the computer makes a guess. The more stuff we find out about weather the more we put into the computer, and the more complex the prediction. This is called a "simulation", and we use it for lots of things from weather to stocks to life insurance. It is always computer-heavy.
What are electromagnetic waves?
Light is an electromagnetic wave . Thus all EM waves travel at the speed of light. Light is a form of energy so different electromagentic waves have different amounts of energy. Light that contains very little energy are things like radio waves and microwaves and infrared light. We use these waves in our everyday lives. Light with more energy is visible light. These are the waves that we as humans can see with our eyes. Other than that, they are no different than any other wave. The waves with the most energy are ultraviolet, x ray and gamma rays. These electromagnetic waves have uses in our every day lives but because they contain so much energy in them they can harm our body. In the simplest sense: Electromagnetic waves are a form of energy that come in many different energy levels.
Why, in boxing, does the referee continue to count after a downed fighter stands back up?
It is called a standing 8 count. It basically gives the ref the ability to judge of the fighter is able to go on, or is he is essentially out on his feet. Also gives the fighter an extra couple of seconds to compose himself before continuing _URL_0_
Why does 76 F/24 C with the heat running feel different from the same temperature with air conditioning?
There are lots of things going on with how you think a temperature feels but the basic idea is that we don't really sense the absolute temperature. We sense differences in temperature. The simplest way to see that is being outside on a hot day vs. coming inside from a cold day. When you come in from a hot day you sense a large drop in temperature so it feels cold. If you come in from a hot day you sense a large increase in temperature so it feels hot. If that doesn't cover a case you are thinking of let me know and I can add more complications.
How does sleep restore energy and what causes your brain to signal you to become exhausted?
Sleep doesn't really restore energy, your body is actually kind of tricking you into resting by producing chemicals that make you feel exhausted. Make no mistake, you need sleep to avoid long term damage to most of your systems; feeling tired is an illusion though.
Why do some companies have different names for different countries? Like Lynx/Axe or Asda/Walmart
In the case of Asda/Walmart, Asda was already an established chain of stores - Walmart buys it to a) gain presence in the UK where it has none and quickly b) instantly gain Asda's customer loyalty and logistics In the case of Lynx/Axe, those are brand/tradmark issues. Essentially Unilever couldn't register Axe as a trademark in the UK so they had to call it something else. Brand trademarks are a regional thing. ', "There's a few reasons. - Brand recognition. Others have already mentioned that. - Brand segregation. Sometimes you want to create separate brands, with different price points. Let's say company A buys company B in another country. it may not actually be a 'competitor.' They may plan to expand operations, and can use the distribution/logistics infrastructure there, but won't actually compete. Like a Fast Food restaurant with a Health Food restaurant chain . - Sometimes 'names' mean different things in different places, or the name doesn't have a favorable image in a new location.* trademark issues Burger King operates as Hungry Jack in Australia, because there was already a Burger King* acquisitions - sometimes a big company will buy an existing chain, and want to keep its brand* cultural/language differences - different names evoke different cultural connections * market research - some names are just not going to be as popular in one culture', "Brand recognition. If one company acquires other it's sometimes easier then building whole new campaign about changing name, or creating new product. There is no reason why Vauxhall should change name to opel, it's not problematic from engineering standpoint, it's just badge.Probably copyright and marketing issues. The former is obvious, but the latter, well, if your target country does not find your name appealing, your chances to profit decrease.
How come people can use quotes in movies without citing the source and it's fine, but if you don't do it in writing it's plagiarism?
It depends on the type of writing. If you're writing a novel you can use quotes as see fit. In academic writing you need to cite anything that isn't your own original work which includes quote.
Why is there an obvious difference between girl and boy handwriting?
Handwriting style is formed during penmanship practice in grade-school homework assignments. Girls are not just more fastidious about their penmanship homework, they are notably more fastidious about all graded assignments in grade school than boys are. There are lots of different explanations for why this is more obedient, stronger identification with their teachers, more ability to focus on repetitive tasks for a long period of time but I don't think it is conclusively known.
How did we get from the "Golden Age" of Air Travel to the current state of air travel?
The golden age of air travel was also the golden age of family road trip vacations. The services were caused by minimum price regulations that placed a very high minimum price for a flight . Because it costs far less than $1500 to fly across the country, airlines competed for travellers by offering services. When the regulations requiring very high minimum prices were removed, airlines began removing services and lowering prices to find that most people prefer lower prices to bundled services, so they deliver the services for which the most people will pay. Edit: Corporate greed means selling the most profitable services for the most money. It's foolish and not greedy to cut services people want at prices higher than the cost of providing them.
Myspace came first, but Facebook is more successful. What happened and why?
People thought Facebook was better, then everyone switched over almost at once. MySpace wasn't first either; before that there was something called Friendster, and before that I personally used something called AsianAvenue, which was social networking for Asians. Each time, everyone switched almost at once. In fact, these switches happened with enough regularity that I'm sort of surprised that Facebook has held on for this long. source: I'm an old fart.
How come we can't change the volume of the voice in our head?
Because they are thoughts; it’s not a literal voice that is creating vibrations against our eardrums.
Going along with the trash to energy question - Why arent we using the methane produced from decommissioned, sealed landfills as energy?
we are. some outfits do this already. however this is a SMALL SMALL portion of total power output of the nation.
Why are states on the east coast so much smaller than the states on the west coast?
The states on the east coast were populated first . State lines were devised in various ways, but all dependent on much of the east coast being populated very early. In other words, there were lots of people clumped up into various areas on the east coast and they divided themselves into colonies and then states. It took longer for Euro-Americans to go further west, and when they did the populations were very small at first. So the western territories were much larger areas, with very low populations, and many of those whole territories later became states. That's actually the way it remains to this day. If you rank the states by population density, California is the only western state in the top half, and it's only #11. Little Rhode Island has almost four times the population density as California.The real question is, why are states in the west so big. Western territories were sparsely populated, and to get enough people together to create a sustainable state, you needed to draw a border around a whole lot of land.[How the States Got Their Shapes] . It's one of the few shows I actually enjoy on the History Channel.
Why can't game streamers have music playing in their videos, but there are countless music videos and songs on youtube already?
If you post a Youtube video of somebody elses song, an advertisement will pop up on the video and the ad money would go to the artist/company, not you. So basically they are claiming your video as soon as it's posted to Youtube. A stream is harder to monitor like that considering it's live and the people who own the website where you stream probably don't want to get sued. lol
Does the start/stop feature in modern cars actually save fuel or is it just a gimmick?
Modern cars with direct injection are very easy to start up. They require less RPM and are much more reliable than they used to, so it takes far less energy to start up the car, especially once it's already warmed up. This means that it only takes a couple of seconds of idling to be worth it, even though it's not very much. Cars which come with start/stop also usually come with a more reliable and more powerful ignition system, which can last a lot more cycles.
How come when we look at something bright, we can see the image burned into our eyelids when we close our eyes?
The way we see is that photons from objects stimulate cells in the back of our eyes. This stimulation takes the form of light-sensitive molecules changing their shape as a photon hits them. When they are in this changed shape, they send a message to the brain saying "I'm activated", which the brain interprets as us seeing something. Now, the fact that something is really bright means that it gives off a lot of photons, and thus it activates a lot of your cells. Now, it takes some time for the light-receiving molecules to fold back to their deactivated state; so if you look at a bright object and close your eyes, there is a time period where the molecules are still activated and sending messages to your brain, so your brain thinks you're still seeing the thing until all of the molecules deactivate.
Why do some humans feel lonely, despite having people around them such as friends and family?
Having people around is not the same as connecting with them. Lonely is an emotional response; proximity is physical.Well, it's kind of complicated, but an ELI5 would sort of be like : Some people have a few very good toys, but sometimes, they just don't like to play with those toys, or they just don't find those toys very special. Other people who don't have too many toys are very happy when they get one or two, and there are some people who have lots and lots of toys, but they aren't happy if they don't have one special kind of toy that money or fame can't buy. Same thing goes with human relationships. You may value some connections over others, or may not be able to connect with anybody, and that gives rise to a sense of loneliness.
What is the US Gun Lobby and how does it have such a large political influence?
The gun lobby is just a group of organizations and activists who believe in protecting and expanding legal access to firearms. The largest and most powerful organization is the National Rifle Association . The reason they're so powerful is because they're incredibly well-funded, which gives them deep pockets to wage media campaigns against politicians they don't like. As far as acquiring a gun, the laws vary state-by-state. If you go through a licensed store, you can walk up to the counter, pick out a gun, pay for it, and then after a waiting period of a few days and a background check to ensure you're not a criminal, you can pick it up. In some instances it might be easier to purchase a gun, and in some it might be harder. For guns to actually be banned would require a repeal of our Second Amendment to the Constitution. For that to happen, the overwhelming majority of Americans would have to come around to a change of heart and believe that guns should be banned. Even if that happened, there is likely to remain a small part of the population that would refuse to comply and give up their firearms. Whether this segment would be wiling to actually fight over it is an unknown question. A lot of people say they would go to war if someone tried to take away their guns, but we have no real way of knowing what would actually happen.
I am not an American and don't know why John F Kennedy was/is so highly thought of
Honestly, mostly because he was young , handsome, charismatic, and he was assassinated before his time. In short, he was perfect martyr material. Also, people looked to the young president as the symbol of hope for a better future. After his death, we instead got the Vietnam War and the general chaos of the 1960s. I suppose baby boomers look to him as a symbol of the future we were *supposed* to have and see his assassination as the moment when we went "wrong".1.He was a president and he died, so it's downright impossible to speak ill of him. .2. He was a very charismatic man and he managed to remain popular during dangerous and frightening times, this makes people like him more, being able to keep people comfortable during frightening times. 3. He made good speeches apparently.4. Hobnobbing with Marilyn Monroe, which would be like anyone political hobnobbing with Scarlett Johansson now, a wonderful feat worthy of a hi-5 from anyone.6. He came from a popular family, his brother also got to be president , so popularity plays a part.7. He fought in WWII, and everyone loves a charismatic veteran.8. JFK got America out of a lot of trouble with economic downfall and similar things. He brokered peace in some places, put America on better terms with Germany, he gave African-Americans their equal status .9. He died. People love thinking highly of anyone who dies and isn't Hitler.
how does drinking water coming into NYC not get dirty from the pipes?
Why would the pipes be dirty? Water utility workers will occasionally open valves and hydrants to blow sediment out of the mains, but for the most part they stay pretty clean unless there's a major break.
How can the law restrict us to so many work breaks but smokers can take how ever many they'd like?
> Why is it that if I were a smoker I would have no problem taking several breaks throughout the shift? Because your employer is treating people unfairly. There's no law about smoke breaks. This is entirely an issue with your employer's break policy.
Why do humans scream when scared?
To signal others about the danger. It's typical for social species to instinctively let out cries or other ways of warning the others of the tribe about approaching predators or enemies. Such collective defense makes both the group and its individual members safer.
What does music sound like to animals?
I actually think this is a really good question. I enjoy some pretty heavy music and I've played it around animals before. It seems to me that if you had an actual person in the room screaming his lungs out a dog or cat would respond to it, but they seem pretty indifferent toward that kind of thing coming out of a stereo. Makes me wonder if they process it differently somehow? Maybe they require a visual cue to clue in that it's actually a human voice.
What does it mean to be an offside player in soccer?
A player has crossed the other teams defensive line, past the last defender before the ball has. So there is an unfair advantage, it prevents goal camping from the offenseA player is in an offside position if they are past all of these lines: 1. Half way line2. Line of the ball3. Line of the second furthest opponent However, an offside is only given if all of these are met: 1. They were in an offside position when the ball was played by a teammate2. They are interfering with play3. The pass was not from a throw in, corner kick or goal kick
Why does earthquake depth matter
AHA! I *knew* my oceanography could help someone! The Earth is unique among a lot of planets due to our *plate tectonics*. This is basically stating that Earth is like a giant puzzle, with HUGE pieces constantly being moved, where they are pulling apart/sub-ducting under/grinding against one another. California rests on the North American plate, which is currently clashing with the Pacific plate. The Pacific plate subducts under th e North American plate. You don't "feel" the plate moving all the time because the when one plate subducts under another, it isn't a gradual process. Tension builds, builds, builds until it finally *snaps!* And energy is released from this event. Now, all this information has been leading up to answer your question; if a subduction event happens closer to the surface, it will almost always be more powerful and destructive. The deeper the depth, the less intense it will be. The closer to the surface, the more you'll wish you were either out at sea or in the air. This is because of how energy "dissipates" or scatters out as it passes through matter. If energy didn't dissipate as it traveled through matter, then earthquakes that happened in Tokyo would be felt over here! Every single earthquake would be a catastrophic event!
How does calorie counting make you lose weight if you eat the extra calories gained by exercising?
Wow - you seem confused. First of all: Check out _URL_1_ Second: Work out your Total Daily Energy Expenditure here: _URL_0_ If you want to lose weight, then eat 500kcal below this value CONSISTENTLY. Note that the TDEE calculation takes exercise into account. You can absolutely lose weight without exercising, I will just not be very healthy. Then you'll just be a thinner person, not necessarily a healthier person.
Why does cheese taste so much better when it's melted?
It doesn't. You just like it better. Also, 'cheese' is not all the same, there are probably hundreds of varieties ", 'Matter of opinion my friend. My opinion is melting cheese makes it oily, almost plastic in texture. Not something I wish to put in my belly. :D', "I'm guessing for you it is more texture and temperature preference than taste. You crave it a certain way not because it tastes better, but it oozes, seeps into other foods and blends a little better. If you have a cold slice of cheese on a burger it does mix with the meat, you just chew it separately.
Why does my 21 inch LED monitor support 1080p but my 32 inch LED tv only does 720p?
You are meant to sit closer to your monitor than you are to your TV, therefore resolution matters more on a monitor than it does on a TV. That being said, there are several models of 32" TVs that support 1080p perfectly fine. One that only goes up to 720p is a cheaper model, or several years oldIt has to do with the size of the "dots" used to make the image. Ideally, the dots are so small you can't see each individual one the bigger a TV gets though, the more spread out the dots get, so the more likely you are to see them, which is why it matters what resolution your TV supports. 1080p means that there are 1080 rows of dots. 720p means there are 720 rowsThe pixels in your monitor are much smaller then those found in a TV. Try turning on your TV and sitting as close to it as you do a computer monitor and you will see the difference. Thus your computer screen be a higher resolution despite being smaller dimensions wise.
Why do all artificial flavors taste the same, e.g. watermelon, but nothing like the actual fruit?
Not a complete answer by any means, but banana flavor is actually super interesting. The current banana we are all familiar with has zero genetic diversity. In fact they are pretty much all genetically the same plant. They can't even be grown from seeds any more since, well, when was the last time you found a seed in your banana? They're all grown by transplanting parts of existing plants. This means though that bananas are very susceptible to disease and way back a few decades ago there was a different type of banana that got wiped out and we never changed it. This was the banana that artificial banana flavor is based on and is why banana candy tastes nothing like the bananas we are familiar with.
What gives milk its white colour?
The white stuff it contains: * [Butterfat], which is a bright yellow color* [Lactose] , which is white.* Proteins, mainly [casein] which is rich in calciumThe white color of milk is because milk contains particles of a protein called casein. These casein particles are not dissolved in milk like a sugar or salt, but rather suspended in it as very very small particles . One of the features of colloids is that they scatter light. As a result, milk simply scatters the light falling on it into all directions within it with a diffuse "glow", causing it to appear white. Here is this effect Other substances in milk may provide it a yellow tinge like fat and other proteins. Lactose sugar is colorless when dissolved. It is incorrect that the lactose contributes to the whiteness of milk.
How was hydrofluoric acid contained or used before plastic was invented if it eats glass containers?
It was held in glass bottles that had a coating of wax inside. *”And, like many other acids, it also reacts with metals, so storing it is a bit tricky. Where do you put something that eats through its container? Well, these days it’s stored in special plastic bottles, but in the 17th century when it was first discovered chemists had to use glass bottles coated inside with wax, and hope the coating was a good one.”* [source]wax bottles. I know the previous answer was glass coated in wax, but when I started teaching in 1991 i disposed of an old bottle of HF, that was completely wax. With a wax stopper. I have no idea how old it was. The teacher I replaced had been there 30 years
Role of Food preservative. How do some processed food claims 0% preservative added, and yet they could be used for a whole year?
That food might naturally be that shelf-stable; the only claim is that they don't *add* preservatives. It's like how fruit juices advertise "no sugar added" because all the sugar came from the fruit themselves. Of course, without a specific example this is just guesswork.
How does someone with the name 'Jose Torres' become a white supremacist?
I know, right? I was wondering that, too. I guess we're products of our environment. Throw a Jose in a pack of white supremacists, and he can turn out racist too
Why do i dream more when i sleep after I have been reading?
Actually, you dream about the same amount every night ; it just depends on how much of the dream you remember. Memories are kept more often if they're important, vivid, or recent. Considering books are only successful if they satisfy both former characteristics, then your memory will contain more recent and memorable memories from which your dreams grab, making them more vivid and interesting, making you more likely to remember them.
How does a woman's body know to sync menstrual cycles with other women that are frequently around?
This doesn't actually happen, though it is a commonly cited myth. Multiples studies have shown that there isn't much truth to the "menstrual sync" hypothesis, though it can *seem* that way. In any group of adult women, chances are that 1/4 of them will be bleeding at any given time. If they're living in close proximity enough to notice each other's cycles, it's easy to notice overlap with each other and it can easily seem like you are moving in some sort of synchronized fashion. But you don't ever get a case where all the women have moved to be on the same cycle, like they're jumping rope together. That just doesn't happenThey don't sync to each other. Menstrual cycles start and last "irregularly" in the sense that they do not always start on the same day each month or last for the same amount of time every time. The little variances means that eventually any two given females will eventually start on the same day. It has little to do with proximity and more to do with physiological variations.
Why are knives and swords curved?
It gives the blade a point to drive forward, if that makes sense. Imagine you have a big juicy steak in front of you. You grab your fork and knife and get ready to cut a bite. Your knife is perfectly straight from the handle to the tip. As you try to cut your steak, the tip of the knife keeps stabbing at the meat and it's taking quite a lot of energy to get through the meat. So you set down that knife and pick up a slightly curved one. Instead of the straight downward pressure you used before, you can now start with a higher angle and drive the curved edge through the steak with ease. The same goes for swords. You're in a war and you're running at your enemy with a sword. It's got a straight sharp blade. You swing it at him and you land a nice deep cut, but your blade got stuck. You struggle to get it out while your enemy swings at you. Now imagine the same scenario with a curved blade like a scimitar. You swing and hit your enemy; although you may not have landed quite as deep of a blow, the curved blade had less of a chance to get stuck.There are a number of reasons. Take the Berber Arabs, they used curved swords because they often rode into battle on horseback and the curvature helped to stabilize attacks and balance weight so that they can be more easily used. In a more generic sense, curvature also assists in damage since it forces more of a point and the business end of the weapon, making attacks easier and more effective. Rather than having to run a straight knife along an object, swinging a curved sword will kill two birds with one stone, it will chop _and_ slice.When a blade is curved, any cut you make is going to be a slicing cut as well as a chop. With a straight blade, you'd have to actually move the blade along its length to slice something, which is not ideal.
How do planes avoid collisions above the Atlantic where there is no radar?
There are airplane “highways” usually separated by 10 000 ft. East you fly odd and west you fly evenplanes have their own radar plus the pilots have windows and, as others point out, there are standard flight lanes/rules you follow to prevent collisions', "Any plane that has a 10 person capacity or greater is required to have what's called a Traffic Alert and Collision System which does warn pilots of nearby air traffic and sounds an alarm when a plane is within a certain distance and on a collision course. You can read more about it here: _URL_0_", 'People are talking about TCAS a lot but that is a second-tier defence against mid-air collision. Traffic is managed over the Atlantic and other oceanic/remote areas simply by planning to fly a route and altitude that doesn’t conflict with others. At regular points along the route reports of position, altitude and speed are made to ATC. Entry points and times into the area are adjusted as is the route and altitude as needed to maintain separation. On top of that there’s SLOP in which aircraft will offset their track to the right by 0,1, or 2 miles at the commander’s discretion. That reduces the risk further. Over some remote areas where ATC is unreliable, frequent blind transmissions to other aircraft in the area are made. The other aircraft note the position, altitude and route of the aircraft and assess any conflict. If proximity is possible, the crews decide a course of action. It’s very rare as over places like Africa there’s very little traffic for the size of the sky. If there’s a mistake made then TCAS may come into it.They have an instrument called a Traffic collision avoidance system which detects other aircraft's transponder which is a mandated by international regulations. It can provide approximate direction and distance as well as other information provided by the other crafts transponder. It wouldn't help if there were a plane flying without a transponder though.
Why do flies and most flying insects seem to intentionally keep bothering you after swiping at them multiple times?
That's a bit like asking you why when it's hot out three days in a row you don't just move to another UNIVERSE. They aren't smart, their worldview is about 1 bazillionth of a second in front of them and a foot around them. They are running on auto-pilot and the auto-pilot programmer was a mouse, who was in a coma.They are attracted to C02. Then you move around you breathe more.
Why does healthcare in the USA cost so much more than elsewhere, is it better than treatment elsewhere?
In the UK everyone contributes to healthcare via taxes. More people contributing to a communal pool means lower overall costs for everyone. In the US everyone has to buy their own insurance and many people don't/can't. Smaller amount of people contributing to a communal pool means higher overall prices for everyone. Added to that people with insurance are technically covering those without because it's illegal for a hospital to turn down patients. If someone comes in with a broken leg or gunshot wound or whatever, the hospital is required to care for them. If they don't have insurance the hospital has to write it off as a loss and the prices for everyone else's care goes up as a result.
In the Star Wars Universe, are lightsaber duels decided by whoever is the stronger force user or is it more of a skill based battle?
It is a mixture of the two since the force effects your reflexes, physical strength, focus and predicting your opponents moves. Rey may well have been just as strong in the force as Kylo but she also likely had some skill with physical weapons based off the fact she carried a staff most of the time leading to an even-ish match up.
Why do we feel sleepy in warm temperature rather than cold temperature ?
I learned at least one of the reasons for this from a professor last semester. He's a kineticist and very into endurance running -- and he told us just exactly why the perfect running temperature is what it is: Pyruvate kinase Essentially, the heat outside actually interferes with the body's ability to make ATP, the energy molecule, out of the food we digest. This happens because pyruvate kinase, a crucial enzyme in ATP synthesis, is concerted mostly into a biologically inactive conformer at around 85 degrees F. This conformer is present in some portion at 70 degrees, but it's mostly the active form that dominates. After about 85 or so, you have a 60/40 ratio of the inactive to active forms. TL;DR heat slows down your metabolism and you run out of energy.I feel sleepy in warm weather but can’t sleep in warm weather. Sleep like a baby in cold weather as-long as I’m under a warm blanket I’m defective
why do ebooks cost more than paperback?
I have never seen an eBook cost more than a physical version of the same book. What makes you think this is a thing that happens?', "You're absolutely right.I think that has more to do with the demand of physical books having gone down.More people find it easier to just download an e-book and so the demand for that is more. It may not have anything to do with storage/logistics, etc as you'd expect.
Why do most toilets have handles and not pedals?
I believe this problem has been erradicated with the installation of, the bathroom sink, in which to wash your hands afterwardsHandles were designed to be a lever to lift the rubber/silicone stopper that holds the water in the tank. traditionally its placed higher on the tank to facilitate easily being able to reach it, but also hygine actually DID have a thought in it. Pedals, are hard to reach or press down, also things can roll under and jam them shut. Realistically, a pedal is going to be much more hygienic yes at first, but people miss simple thing.When toilets were first designed hygiene wasn't really a big concern like it is now
If the House always wins, how come most casinos go broke?
Casinos have tremendous fixed costs. They are in A+ locations that require huge loans for land and building. They have to purchase furniture, televisions etc. They also have to purchase gaming tables, electronics, and systems. They also have to pay more labor than most service industries. There is cleaning staff, management, floor staff etc. Casinos are heavily regulated by the government and their winning percentages are recorded. They cannot for example 'tweak' the electronics for higher payouts. Everything is done on percentages and casinos win more than they lose but not by much. People have to feel like they can win. Customer acquisition costs are tremendous because a customer can simply walk out the door if they feel like they are losing. To entice gamblers to stay and reduce customer turnover they provide costly amenities like low priced food and free alcohol. As casisnos age they become less popular. Customers are often attracted to newer, better, larger aspect of casinos. A new casino down the street can easily pull a large percentage of customers from older casinos. Considering that they need to be remodeled frequently and heavily advertised. Often whales define a casinos profits. Those gamblers that can come in and drop large amounts of money at a time. A few whales a month can make or break an operating statement. This is why they comp rooms and roll out the red carpet. They are also seasonal in nature. The ELI5 answer is that they spend more than they bring in.
What do radical terrorists hope to accomplish? What draws people into such groups as Al Qaeda?
Actually, Al Qaeda had a published 20-year plan. It called for engaging the infidel in countless small conflicts, dividing their forces and wearing them down economically and in public support by attrition. It hoped that the government would become oppressive in the face of the threat, resulting in more Muslims rising up and joining the cause, and more loss of support from the general public. And so on. Wow. Lucky for us that TOTALLY didn't happen, eh?
Why is a recent (less than a year) prescription required to order replacement contact lenses or glasses when it's OK to wear existing lenses or glasses for over a year?
I get my eyes checked every year and because of my health insurance, I only pay a small copay for new glasses/contacts. You should be wearing the best corrective lenses for your eyes so if you have not gone to see your ophthalmologist in over a year, you should. Its not really OK to wear existing ones if your eyes have changed in that time as they can lead to headaches and damaging your eyesight even more. Which is why you should make it a point to get your eyes checked at least once a yearThis is presumably your eyewear shop’s policy and not a universal thing. I regularly buy glasses online with a 5-year-old prescription that I should really get around to updating. A cynic might suggest that the eyewear shop’s policy is trying to drum up business for their on-site ophthalmologist but you really should see an eye doctor regularly anyway.
why did detroit fail?
In the 50s and 60s, the United States was the only country producing reliable, quality vehicles meant for a middle class population. BMW existed in Germany, and Rolls Royce in Britain, but neither company made affordable vehicles. In the 70s and 80s, however, this changed as Japan and South Korea finished rebuilding and Toyota and Honda started producing reliable vehicles themselves. In response to this competition, Detroit did nothing. In fact, their vehicles steadily decreased in quality as Asia's improved. The behemoths of Michigan were arrogant, and thought they would always have a market, no matter how inferior their products. American consumers proved them wrong.
How prominent does a person have to be for killing them to be assassination rather than murder?
Assassination is murder but murder is not necessarily assassination. Assassination is usually connected with killing someone for cause not personal or even necessarily related to the killer in any way. It tends to be a job usually done for others. The term "assassinated" is usually used with the killing of people of public notoriety or fame. An assassination is when the victim has been selected for the express purpose of achieving a political aim. There is a difference, for example Tupac was shot and that was murder but Archduke Franz Ferdinand was assassinted.
Why do passengers have to open airplane windows during takeoff and landing?
It's so the flight personnel can see the engines/wings to ensure no issues. However, I've never heard an attendant say to open windows for landing/takeoff.
Why do servers crash during a big launch? Wouldn't the company have countermeasures to prevent that before the launch?
It can be really hard to correctly estimate how much strain a big launch will put on servers. How many people will really be playing? If you could accurately predict that for each major launch, you have a very lucrative skill. Mostly it cannot be done. Oh, companies can get rough figures but you never truly know until you throw the servers online and it actually happens. And because servers costs money, management especially will be prone to lowballing the figure as much as they can. Might that lose them some customers? Yes, but it is harder to prove the value of the customers lost, than to prove overspending on servers. Additionally, you have the issue that it isn't necessarily a smart business move to be able to handle every peak if that means your equipment will go unused most of the time. Look at Reddit at their servers. Yes, sometimes you will get a 'server not available' error if everybody is posting all at once. And yeah, that can be a bit obnoxious. But for Reddit, financially, it is better to have those short periods of annoyance, than to buy many more servers and have those sit idle a lot of the time because normal usage lies far below those rare peaks.
Why don't American coins have numbers?
So back in the day a dollar was a silver certificate that you could exchange for a dollar worth of silver. Coins used to be made mostly of silver, so a quarter had 25¢ worth of silver and a dime 10¢. There used to be a half dime, but it was deemed to impractical because of how small it was, so the nickel came out in a larger size made with cheaper metal.[Three of them have numbers describing their values.] One cent, five cents, and quarter dollar. The only one that doesn't fit that is the dime, which describes itself as one dime.They are different sized, thicknesses, and have their names on them. There is no need for numbers. As to the sizes of the coins, that has to do with the time that they were actually made of precious metals. That a penny was 1 cent worth of copper, a nickle was 5 cents worth of nickle, a dime was 10 cents worth of silver, a Quarter was 25 cents worth of silver, etc.
Why did something that costs $45 dollars at Walgreens cost me almost $2000 at a hospital?
You're not just paying for materials. You're paying for a whole host of services. For one thing, a medical professional was available for you. Having a staff of residents, nurses, doctors, etc. isn't cheap. After all, they're not like potential cashiers or janitors where anyone can perform the job. Rather these people spent decades of their lives and hundreds of thousands of dollars to get where they are. Hiring them isn't cheap. Not only that, but they're available around the clock. If a hospital employs professionals to be on call at 3 in the morning, that's going to call for even higher salaries. Additionally, there is maintenance of the facility itself. Hospitals have to deal with utility costs . However, unlike a Walgreens, they also need to keep the building extra clean and certain things sterile. Not only that, but you used up a room in the building for some period of time. Another relevant aspect of an ER is that people must be treated regardless of their ability to pay. As a result, the hospital gets screwed over whenever an uninsured, poor person has a medical issue. To make up for this, hospitals recoup money elsewhere. The last thing I can think of is malpractice insurance. Simply put, lots of sick people who don't recover sue the hospital. This costs hospitals lots of money. There are probably other factors as well. In short, it's expensive to maintain an ultra-clean building, treat patients regardless of their inability to pay, and have trained professionals available 24/7 year-round.
Why does hot water feel significantly hotter on my face than on other parts of my body?
A more sensitive and dense pattern of nerves and minute vascularisation in your face. Your back/thigh/arm doesn't have the same amount or type of nerves as your face. Your head is highly vascular as well, and is the warmest appendage from the core. You regulate your skull temperature quicker to keep your brain in its happy stasis. Feeling hotter heat on your face is a sensory warning to protect your noggin.
If illicit substances such as drugs were legalised, what would become of the black market? Would there be demand for something else?
If there is way to make a profit the black market will find it. Take cigarettes, they are legal but because of the high taxes placed upon them it is possible to buy them in places that have low or no taxes and then sell them to retailers in areas with high taxes making profit for the black marketeer and a little more profit for the retailer. Legalized drugs would likely fall into a similar situation. If there is a way to make a profit there are always people willing to skirt the law or openly break it to take that profit.Nope. Demand already exists for goods. Changes in legalization wouldn't change demand for OTHER illegal and unrelated goods. In fact, demand for illegal guns would probably drop, given that dealers no longer have a stash to protect.uumm whatever is illegal will become or still is the black market drugs will turn into a grey market where people selling might or might not pay taxes on selling drugs
In theory, could an object with the mass of a grain of sand hitting the earth cause the same damage as a huge asteroid, if it were traveling at a fast enough velocity?
First of all, > Energy = Mass times Acceleration This is wrong. Force=mass *acceleration. Energy = 1/2 mass *velocity^2 . To answer the question, if you were to ignore the atmosphere, *maybe*. In real life, earth is surrounded by an oxygen rich atmosphere. As soon as that grain of sand hits the atmosphere, it would compress the air a lot, immediately start burning, and then be gone. Super-high velocity very small meteoroids hit the atmosphere like this all the time. If they're bigger than a baseball, you see a neat little flash and call it a meteor. Smaller things just flash and gone. If the earth didn't have an atmosphere, then the answer is maybe, probably not. When the difference in size between two objects colliding gets to a certain point, you stop getting a collision and start getting a penetration. The result would be similar to shooting a bullet into the ground, there's no big "smash", it just drills a grain-of-sand-sized hole at the point of impact.
why can company's like U.S. Cellular claim to have 4G coverage everywhere but in reality, only have it in very few places?
They absolutely never claimed that. That would be a complete lie. They always publish maps showing where they have 4G coverageCan you provide a little more evidence of that claim? Verizon/AT & T have been at war over this issue and use slightly different terminology to make their claims, but I 've never seen U.S. Cellular claim LTE as coverage "everywhere". Their website pretty clearly states it is available in select cities while they continue the rollout.
Why are so many Americans afraid of having voter id laws?
Some 10% of Americans don't have photo-ID, and that group tends to be the elderly and the poor
What does a runny nose actually do for recovery, like from a flu?
It prevents additional viruses from entering. As the immune system is busy handling one virus it leaves the body open to attack from another virus. To prevent this there are several other defense mechanisms that turn on like increased mucus production, lack of hunger and tiredness. The flu virus and influenza virus does take advantage of this as it spreads though mucus that gets airborne after you cough. So it will also stimulate mucus production.It's like lining the floor with towels and buckets when your roof springs a leak. Mucus catches the stuff coming into our bodies from the surrounding air, so a runny nose is like dumping the bucket or wringing the towels so that the floor doesn't get damaged while you fix the roof.
Why do we no longer use supersonic commercial flight?
It's not profitable. This has been discussed several times today -- if you want more info, the search bar will help you out.
How do DVD players remember where you left off on a movie you haven't had in your DVD player in years?
Some DVD players have storage. They basically save a unique identifier that is tied to a specific disc image and time point in the film. If that disc is played again, the player knows what point to resume play from. It's not really a matter of how long it's been since you last played the disc, but rather how many discs you have played since. Your average player can remember about 10-15 discs at a time. So if you stop one halfway through, then proceed to watch 15 different movies, you won't be able to resume the first one anymore. Then you get to more specialized players such as gaming consoles, which are computers with DVD drives. They have way more storage space/capabilities than a standalone player, so they'll store playback info for just about every movie you've ever played.
Is it bad to hold back sneezes? Like pinching your nose to block the sneeze etc.
Every time I hold in a sneeze I almost shit my pants. I literally can picture the sneeze working in reverse and trying to come out the other end.
Positions and Payouts in The Big Short
Michael Burrey ended up walking away with $100 million personally and $700 million for his investors which worked out to a 490% return on their investment. The small guys, Geller and Shipley, turned $15 million into $120 million. Mark Baum and his crew turned $100 million into $1.5 billion. At the end, Mark Baum discovers that Morgan Stanley had been issuing Credit Default Swaps, the investment vehicle he was using to short the housing market. Essentially, Morgan was on the losing side of the bet. Mark was mad because his firm was a subsidiary of Morgan and now Morgan was going to lose billions and ironically could cause his firm to collapse as well as many of the banks who issued him credit default swaps were collapsing and might not be able to pay out what they owed Baum. In the final scene, where Baum finally gives his guys to ok selling the position, he has a financial and a moral dilemma. On one hand he is mad that the banks are only able to offer a fraction of what they owe him, but ends up settling for what they offer, still making over $1 billion. The moral dilemma is that he was becoming what he had always hated, a Wall Street fat cat making billions off the suffering of the general population.
How were the lights synchronized in Lady Gaga's halftime show?
The drones use Intel's realsense technology combined with infrared LEDs, allowing the drones to know where each other are and form a sort of wireless mesh network. Once the drones know where they are and where they are supposed to be, you can program them. Example of drone formation from 5 years ago: _URL_0_
Why two signals at different frequencies can coexist?
It's just like sound. If you press two keys on a piano, you hear a sound that is different from the sound either key makes by itself. The combined waveform has components of each note's frequency. A more selective receiver, the kind that only hear's one note, like the kind your radio uses, works differently than your ear. It internally generates a signal with the one frequency it detects. It uses a circuit called a phase locked loop to align itself with that frequency even when it's mixed with other signals. Once it syncs up, it can detect when the signal is there, what it's amplitude is or measure small chages in frequency .
How many color combinations are possible with choosing 4 out of 7 colors if colors can be repeated and which formula is applied in this instance?
7^^4 = **2041** of possible combinations Someone correct me if I'm wrong, but this should be it E: Wrong, it's **35**, see below
What causes alkaline batteries to leak when mixed with other types of batteries?
All batteries of the same size pretty much always put out the same voltage regardless of what they're made of, so I think it may be a case of the other batteries may leak and they just copy-pasted the same safety warning. Those cheap "Heavy Duty" batteries you see in dollar stores are I believe Carbon-Zinc or Zinc Chloride batteries, an older, cheaper battery technology that has a lower capacity, and, more importantly, leaks when it is fully discharged. If you mix alkaline cells with these cheaper ones, because their capacity is lower, they will deplete first, but because the alkaline batteries will still have power left, your TV remote might still work, but one of the batteries is rotting it's guts out and is a out to spray acid all over your lap because, of course, you lost the battery cover. Its most likely a warning because if you mix battend types, one type may start leaking when it dies, but you won't be warned by all the batteries running downAlkaline batteries will eventually leak even when used with identical alkaline batteries. A better question might be "Why do alkaline batteries sometimes leak?" ', "As the batteries discharge or their contents expire, their internal chemistry changes and this process produces gas. This gas builds up inside the shell making it swell and eventually it fractures, leaking its non-solid contents. The leak is due to the overall build quality of the battery. Ideally it should occur long after its depletion and disposal. I'm not sure if mixing with other kind of batteries would speed up this process. But mixing batteries with different levels of charge will certainly cause problems. As Cheetawolf said, you could have one expired battery while another one keeps your device working, in which case you'd fail to dispose the depleted battery before it leaks.
If I fall asleep at 12:30am and naturally wake up at 6:30am, will I be better or worse off then getting 2 more hours of sleep, but waking up to an alarm?
I heard it's best if you get up the first time you wake up naturally. It's your natural cycle. Majority of people need around 8 hours but there are people who just need 6. some might need 10, it depends. I've noticed myself that I'm less tired if I get up the first time I wake! You should try it :)
How do computers remember the time even after they are shutdown/ plug pulled?
Tiny battery in a component known as an RTC, or real time clock. These components use so little power the battery will usually last the lifetime of the computer.
How can they tell how many people watched certain TV show?
They use Nielsen ratings. Certain households, called Nielsen families, participate in a program where they log everything they watch. These statistics are extrapolated to the whole country. So the viewership numbers you hear are estimates based off the number of Nielsen families that watched that show.