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Why do our bodies wait until we're soaked in sweat to wake up when too warm at night?
Normally, they don't. Most people wake up before they're soaked with sweat. Most of the time, anyway. Night sweats are usually associated with some other, underlying problem. Could be any of a variety of things. Night sweats are a common side effect of any number of different medications, to say nothing of drug/alcohol...
Why is Rachel Dolezal identifying as black considered a negative thing? Is her racial identity that much different from a transgendered person identifying as a different gender?
Actual ELI5 answer: Every fetus has, at some point, the capacity to be either gender during development. Fetuses start off female, and depending on a number of factors, end up either staying female or developing into male. It's not hard to imagine, then, that sometimes things go wrong with this process and the kid come...
How the overall scoring for the World Cup works, and what would need to happen for the US to advance.
There are eight groups each containing four teams. During the group stage teams play every other team within their group . 3 point are awarded for a win, 1 point for a draw, and 0 points for a loss. The two teams with the most points in each group advance to the knockout stage. If two teams are tied in points after the...
Could someone explain LI5 the bends and decompression for divers?
Stodavr's pop can analogy seems good enough so I won't bother to repeat something similar. If the pressure doesn't change, you won't get the bends. This is why you don't get the bends in a submarine. A space ship would be similar. There might be some other problems due to how they deal with air inside space ships, but ...
Why do companies (Google, Apple, etc.) that have billions of dollars worth of debt not pay it off when they have the money for it?
If you're paying 5% interest on debt, but can make significantly more on investments, it makes more sense financially to carry the debt than to pay it off.
Why does plaque only build up near the heart, causing heart attacks? Why aren't kidney attacks, liver attacks, etc, more common?
Vessels can clot in other places. Vessels can clot anywhere in the body Heart attacks get attention because they're more dangerous. Heart attacks are caused by a clot in the coronary arteries which are the narrow vessels that supply blood to the heart muscle. A clot in a similarly sized vessel in your leg wouldn't be l...
Why is it so socially acceptable to drive 5-10 mph over the speed limit?
I think some of it origins from cars having not-that-accurate speedometers. You added 5-10 mph over the speed limit to actually go the actual speed limit. Then it just became a normal thing to do and as the traffic generally goes 5-10 mph above the speed limit now, it's easier to keep up with the traffic instead of obe...
In car racing, how do they keep the cars organized into a clearly defined "front" of 1st, 2nd, 3rd, etc when the cars are constantly doing pit stops?
These days, usually by GPS tracking. In earlier times with well trained marshals at key points on the circuit. On some of the older very long circuits in Europe this could lead to significant chunks of the track being effectively unmonitored - so if a driver had a crash in one, it could take ages before anyone realised...
Why do skilled NFL athletes still commit penalties?
It's tough to speak to each individual occurrence. But for every penalty that does get noticed, there's many more that go unnoticed. Face masking isn't the best example of this, more often than not, if you're going to face mask someone, you're going to get caught. Holding, however, is a much easier point to prove. The ...
Why are self-driving cars so much more amazing than drones? Why is it easier to create a pilot less plane than a traditionally easier to manage car?
Unmanned aircraft just needs a balance sensor to make sure it's flat, then it can shoop on over anywhere it wants based on calculations from that. Vehicle needs to worry about a lot things, since it was designed to operate in multiple weather conditions. It also has moving objects it must avoid safely, since it wants t...
Why are certain countries paying up to 60% less for digital PC games?
Prices are relative to the countries purchasing power, just because a gane is cheaper in russia doesn't mean it's cheaper for the average russian whem compared to the average american.
Why is throwing a glass of water on someone considered Assault?
Battery is when you hit someone. Assault is basically when you threaten someone. Also, don't feel too bad about this particular situation. It would suck if they ended up going to jail, but in a situation like a bar fight it's probably a lot easier to arrest everyone involved and sort it out later.
why the Pachelbel's canon in D works with so many pop songs?
Pretty much all western music has the following two key components: - A time signature, which tells us how many beats there are in each bar. You'll notice that all the music in both those videos has 4 beats per bar. There are pop songs in 3 beats per bar, and these won't fit. 4 beats per bar is easy to dance to, so tha...
Why can't things in small countries be replicated in large countries?
Population density. Smaller developed countries tend to have a higher percentage of their people living in urban areas where you can put more doctors, teachers, psychiatrists, etc. in the area within a short distance and give you a choice between them allowing you to choose one that you prefer over one that you don't. ...
Billion-dollar valuations for tech companies that have never turned a profit (!?)
I read an interesting article that argues that every new company has two growth models to choose from: Ben & Jerry's or Amazon. In other words, low and slow or high and fast. The model you choose is based on your competition. You either have to compete on a product and brand recognition level or through a massive land ...
What happens if you put something non-recyclable in recycling?
You already answered your question there. It's separated in the recycling plants. There's countless methods to do that of course. Glass may be filmed, so that bottles with the wrong color can be picked out automatically. There's also the method of using momentum, where a conveyor will just end, causing different kinds ...
If North Korea is so messed up, why doesn't it just fall apart?
The powerful central government and harsh punishments for even the suspicion of a whiff of dissent is enough to suppress members of the public from organizing or instigating any rebellion from within. The US and other Western nations are monitoring the situation, I'm sure, but haven't decided it worth the risk and pote...
Why do white people have distinctly different voices than black people? Essentially, when talking to someone, why are you able to tell the color of their skin based solely on their voice?
You actually aren't as accomplished at this as you might think. I used to work in a call center and telling the difference between different races and sometimes genders can be impossible without different vernacular. The pitch of their voice isn't a racial thing, just genetics and its the same for everyone.As /u/doc_da...
How is the UK so prominent and how has it been such a big factor in history despite its small size?
tbh the naval power is the main thing and we the uk taking over country's. ie india, alot of caribbean, parts of africa. i mean we own a 1/3 of the world landmass at one point. not bad for a country that is smaller then several states in america. then the industrial revolution aswell
what exactly is spicy?
There's a thing called the Scoville scale, which is based on capsacin concentration in the food. But if I recall correctly, it's basically related to tasting. You can also do chemical analysis on it to actually find the concentration of capsacin, but Scoville heat units are much more common. Capsacin is a chemical whic...
Why are dogs and cats so afraid of vacuum cleaners but not other things like leaf blowers and lawn mowers?
I'd guess its because the vacuum cleaner is in the house instead of outside, where all the other noisy things live.Rev up a leaf blower in the living room and see what the cat thinks about it.
Why do fans often go from Off to High instead of from Off to Low?
It takes a good amount of energy to get the blades spinning from a dead stop. The amount of energy required to keep the blades spinning is much less than whats required to get them moving. Larger fans like those in AC units have capacitors that give the fan its initial bump to get started. In smaller fans it makes sens...
Why can't Netflix help us get around throttling by encrypting their traffic and including the decryption in an end-user plugin?
When routers handle internet traffic, they always know the source and destination. Encryption doesn't hide that. Even if it did well, imagine this scenario. Every day, I run a herd of elephants across your lawn. You get upset and say you're going to charge me for the damage to your yard. So, the next day, you see a her...
how is a space rocket aimed at a planet?
If you want to hit a moving object, you aim where it is going. The Earth is moving, but that actually doesn't matter! Imagine you're in a moving car, trying to hit a car driving next to you. If it's going faster than your car, you have to aim in front of you; if it's slower, you aim behind it. If you're going the same ...
Whats up with the "higher altitude" baking instructions on my cookie dough packaging?
At higher altitudes, water will boil faster and with less heat required. However, the process for cooking food is usually not simply he water boiling, but the chemical reactions facilitated by the water's heat. If the water isn't hot, it won't cook, even if it boils.
Why are 11 and 12 eleven and twelve and not one-teen and two-teen
In Spanish, that's *kind* of the case . In Korean, it is also kind of the case. It's just how different languages derived their counting words. French has it differently--80 is four-twenties.
I'm nearsighted. Why are reflections of things far away still blurry if the mirror is only a few feet away?
You're effectively looking the distance from the object to the mirror *plus* the mirror to your eyes. If the mirror is two feet away and the object is twenty feet behind the mirror, you're seeing it the same as something that is twenty-two feet in front of you.
why manual cars are dying off even though they're more fuel efficient and keep the driver focused
I drive a stick and often get stuck in traffic uphill. You people complaining it's hard are wieners.A number of reasons:* comfort: modern automatics are getting better and better * combination: lots of autos feature some kind of manual mode* fuel efficiency is a double edged sword. You have real life fuel efficiency an...
what's the point of runway shows with outrageous clothing?
I think this has already been said but those clothes aren't meant to be worn. It's like going to an art gallery. This is what is possible with clothing and it's meant to be interesting to look at for all sorts of reasons.Clothing is practical as we get cold. Anything beyond the necessities is just self-masturbation, po...
Why doesn't the world adopt a universal currency?
Explaining this like your five: Currency= Dicks Economy and market = Vagina's Lets say Africans all have **small dicks** and every one in Italy has pretty **average dicks** and everyone from Sweden all have **huge dicks**! now for this example to work all the women need to have accordingly sized vagina's. I.E African m...
Why is internet in Australia crap ?
95% of the English language internet is located off the island. This means they need transoceanic cables to connect to the rest of the world. It's a long distance, there's a small population & there not any other major developed countries nearby so there's not a lot of money in laying new cables. Since there's shitty c...
Why does air travel (especially US airlines) have such a low rate of failure?
Imagine every time went for a drive, you spend 30 minutes inspecting your car, and if you found anything off, you called a mechanic over to look. Every few weeks, you had a mechanic inspect it. Every few months, you had a mechanic do a full diagnostic. And every year or two, you had the engine and transmission rebuilt....
What happens to a condo that someone owns if a building becomes too old and collapses?
Presumably you'd sue the condo association for failure to keep up the building. Your insurance would also likely cover at least part of your damages if the building fell down.
How are the photos "shot on iPhone 7" not pixelated and blurry when enlarged to billboard size?
Viewing distance. If you could get close to them, you'd see the blurriness. You need 5000 pixels for an image to be sharp at any viewing distance *that allows you to see the entire image in your view*. If you get closer, you'll see the pixels and/or the blurring done by processing to hide the sharp pixel edge, but if y...
How do TV game shows tax people who get cash on the spot?
There have been documentaries on this, specifically related to the Price is Right. Surprisingly the fact that you have to pay taxes on lottery winnings and tv show prizes isn't as common knowledge as you'd think. If you win you have to fill in paper work and deal with the original vendor that donated the prize. Contest...
How do clocks become fast or slow over time?
Your watch likely uses Quartz, which resonates at ABOUT 32,768 Hz. Hertz are a measurement of frequency and time. 1 Hertz is [This]. Your watch basically counts the cycles and knows that after 32,768 it needs to move the second hand. Quartz has a clock drift of about .5 seconds per day. Your phone uses GPS timing, whic...
Why don't animals and pets menstruate everywhere, if human's cycle is so messy?
I take it you have never had a female dog that wasn't fixed.I had two bitches that were half sisters. The smaller one bled a lot but the larger one only spotted. I suppose it differs from dog to dog.Because dogs and cats can lick themselves in places you can't.
Does health insurance really pay $1,000 for a piece of equipment that retails for $150?
My mom had some health issues and needed a special bed. Her insurance paid for it, but she had to make monthly co-pays of $25 each then after 12 months she would own the bed. I was dealing with the insurance and bed provider. All in all they charged her about $10,000 for the bed and mattress. You can buy a very similar...
is candy really harmful to children?
Children can't be allowed to choose how much candy they eat, because they will choose to eat too much. However, educated adults can choose to give children candy in moderation. In these small amounts it isn't harmful, or going to make them obese. Too much of many things, including candy or salt, is harmful to the healt...
Why are measuring cylinders and container vessels cylindrical?
It's because when you're measuring such relatively massive quantities, you only rarely ever need to be extremely precise. Most applications that require 100cm^3 of anything are okay if it's 99.6cm^3 or 100.4 cm^3. If not, you wouldn't fill it up to a visible line on the side of a fat container, instead you'd use someth...
Why is it rumored that we can be harmed by standing near a running microwave, but it's perfectly acceptable to eat food that was cooked INSIDE of it?
Oh Oh! Studied this in physics class! How microwaves work: it's a bunch of waves that heat up water. Thus any foods that have water in it will get heat up. Thus if you insert something with absolutely no water particles in it, will not heat up. Now these microwaves are harmful to the body but the microwave is designed ...
why can't software companies make an update/download/install status bar that moves evenly and accurately reflects the percentage of the task that is actually complete?
Let's forget about the computers for a moment. You're driving down an unfamiliar road with nothing but a map and a bunch of boxes you need to deliver to various houses. How do you estimate how long this will take you? The short answer is that you can't definitively say how long it will take, because you don't know enou...
Why is so much of the ocean unexplored?
It's really big, empty, and hostile. The comparison to space is apt, since exploring the ocean floor requires equipment on a scale similar to what is needed for space travel, due to the crushing pressure and whatnot. Unlike space, the visibility underwater is pretty much nill and submersibles can't stay underwater for ...
Does traveling faster than light mean i´m invisible?
Nothing can travel faster than light. It's the absolutely speed limit of the Universe. So it's terrifically difficult to answer this question.
How do people in India know which caste I am?
As an Indian born in India and having lived 80% my life in Canada . No one will care if you're travelling and living with your family. Avoid the conflict areas, and travel with someone and not alone, since you won't know the area either. If your gonna be travelling alone, no one will really give a shit about your cast ...
Why do we need stock markets?
They help firms fund their companies. It was designed to create a system where you can invest into a company for profit. You give a company a sum of money and they give you a percentage of the company. If it didn't exist it would have a drastic effect on how the businesses we know today formed and the market would be m...
How can the sun set at the same time in two time zones?
Today in Rochester NY sunset was 4:45 pm and it's in the same time zone as Miami. But the cities are very different latitudes as explained by others.
If I chew the skin off my lips, am I more likely to get cancer because I'm forcing my body to make new cells faster?
Your assumption that chewing the skin off your lips causes you to make more cells is somewhat flawed. Assuming you're not physically mutilating your lips, what you're actually chewing off is already dead and replaced by healthy cells under your skin. Basically you're exfoliating your lips. Now, lets assume that you wer...
why is it so hard for the US to get 5%of the vote to a third party candidate?
Mostly it's because the two-party system is the norm, and the assumption. The news is focusing from the beginnings of the presidential cycle on 'both' candidates or 'both' parties' respective nomination races. The debates include both presidential or VP candidates, newspapers and TV run endless comparisons of both cand...
Why did the guitar become such a staple of modern music?
Because of acoustics. If you look at all the music traditions of the world, they all relate directly to the environments they were intended to be performed in. That's why tribal music is so drum heavy and lacks harmonic content, and it's why gregorian chant sounds the way it does, and so on. Jazz sounds amazing in shit...
Why do slugs dissolve/turn to sludge when exposed to table salt?
It's called [osmosis]. Imagine you have a bucket half-full of water. Divide the bucket in half with some sort of barrier - metal or plastic or whatever. Pour a bunch of salt into the water on one side of the divider, and only a little bit of salt into the water on the other side. This gives you highly concentrated salt...
Why has the African continent experienced such chaos, corruption and strife over the years?
So your kindergarten class is broken up into groups. You don't get to pick who's in your group, the teacher has someone who isn't in the class split you guys up. Well, there are already a few groups of friends in your class and the groups don't like each other. But the person who split up the class put some people from...
What holds fingernails in place? How far under the skin do they go?
To add to this why don't fingernails hurt when they grow? Shouldn't they tug on the skin underneath?
Why is circumcising boys routine while circumcising girls is illegal?
I don't think anyone is really suggesting that circumcising boys is as bad as circumcising girls, but that's not a great reason to keep circumcising boys. It's like saying being stabbed with a knife is better than being stabbed with a sword. It's true, but it's not a great argument to let someone stab you with a knife.
Why is red bull so expensive, isn't it pretty much just a soft drink with a couple extra ingredients?
Its more about how they market and sell it than what the ingredients are. You can buy a generic energy drink with the same ingredients for half the price.Most other energy drinks are distributed by other beverage companies, like Coke or even distributed by beer and liquor wholesalers. But here in the USA, Red Bull is s...
What is turbulence and is it something to worry about when flying?
From my brief research, a commercial plane hasn't been crashed due to turbulence since 1966, and in that incident, the pilot was being a stupid jag off and doing something he wasn't supposed to be doing - he thought it would be a good idea to bring the plane and his passengers on a sight seeing detour over Mount Fuji. ...
Why does sleeping for a longer amount of time (i.e 12 hours per night) make me more tired than sleeping normally?
Your body has cycles it goes through. REM sleep, and deep sleep are the highs and lows. When you're awoken from a deep sleep, you'll feel tired and groggy. If it's during REM sleep, you'll most likely feel great. I pulled an all nighter, took a 2 hour power nap before my morning class and felt GREAT.
Why, if I shower and wash my dick every day, is the bottom half of my cock darker than the top half?
It's from being circumcised. The lighter skin near the head is from the inside of your foreskin, and the darker skin is penis shaft skin.
Why does a banana brown so fast after you tear it from a bunch?
Ethylene gas is released as the banana ripens, and as it is damaged by picking it from the bunch. In fact that gas is used by companies to ripen green bananas when they're transported to the store. More info at _URL_0_For the same reason you should be careful about leaving a fruit bowl near a vase of flowers. Bananas a...
Why do certain franchising companies limit intentionally limit their geographic distribution? (i.e. why is there no Steak N Shake or In N Out in the Northeast?)
In and out doesn't use frozen beef. Because they deal with only fresh beef, their locations have to be within a reasonable distance from the meat processing plant.
Why is 0 divided by 0 undefined? Doesn't it make sense to have the answer also be a 0?
I haven't seen anyone describe it this way yet, but this is what makes the most sense to me . If you look at it using limits, when you divide something by zero it's like you keep dividing by smaller and smaller numbers. 1/0.1=10 1/.001=1000 You can see as the number in the denominator gets smaller, the overall number g...
Why is it that every-day people can not borrow money for mortgages directly off of the government at the 0.5% rate, but instead have to go through banks and pay 5 times that rate?
The bank can ensure that it will pay the money back in full, so that the central bank doesn't have a risk when handing out the money. But when they give money to corporations or private citizens, they always have a risk factor. If the debtor goes bankrupt, they lose the money. Think of it this way: Instead of taking a ...
Why do some people get pee shy?
Personally, I need to relax a little, and that's difficult if I know I'm being watched or if it's a noisy environment.
How is it possible for an atmosphere to form?
A second point is that a planet's star will produce a solar wind, which blows away gas from the planet. So the planet also needs a magnetic field, to deflect the solar wind and protect the atmosphere.
How the US came to be a current world superpower
Does anyone on this site actually enjoy being an American? This was a legitimate question from someone that wants to know, not a set up for your inane ranting about the horrors of the American government and its policies. Go somewhere else to spout your anti-government rhetoric. Hell, I agree with you on some level, an...
. Why is it adults don't roll off of the bed ?
Most humans have a feature called *sleep paralysis* that prevents us moving more than a tiny bit when we are asleep. So when you dream you're walking around, you don't actually walk around — or roll out of bed.
Why do women hate the toilet seat being left up so much?
This is not an argument that happy, healthy people have. This is an example of the petty nitpicking shit that they end up arguing about when they're full of spite & want to fight about something. It's quite possibly the most cliched and trite of all pointless arguments. It's almost the exact same thing as arguing about...
Are "perfectly straight teeth" (like after braces) better for eating than more uneven teeth (in general)?
It has to do more with the alignment of your bite. With perfectly straight teeth, each of your top teeth is aligned with your bottom teeth so that the flat surfaces of your molars directly contact with each other when you bite down. This means that the force of your bite is evenly distributed among all the teeth. With ...
How does a computer generate random numbers? Or how does a computer pick random things?
> I could imagine there is something counting something like button presses and playing time or anything else, then summarizing it and then multiplying it by a number or anything basically things like this, they take values that change and do some math to make a number. It's often said that they are no *truly* random n...
Why did the USA and USSR kept building nuclear bombs, although they had enough bombs to erase each other completely several times?
After certain point the bombs stopped getting bigger. The idea of a nuclear weapon was to make something so destructive it would wipe out everything indiscriminately, because once it falls from the plane it's not that accurate. With computers and missiles, the bombs could be placed within feet of a target. On top of th...
What is actually happening to a person when they are stuttering and is it possible to get rid of it?
I have been stuttering since I was a little kid. From what I can tell personally is that my mind is already on the second and third sentence before the first sentence can actually be spoken. Certain sounds in words can also get my mind broke :). But mostly it's just not taking the time to say whats on my mind first ins...
g2a, how it works, and why there's so much hate towards it
Aside from other things people have said I had very bad experiences with all of the games I've gotten from them. I have. Ever purchased another one and don't plan on it.
Why does ICE need a criminal conviction in order to deport illegals?
They don't *need* a criminal conviction. However, they have limited resources, and need to prioritize how they use them. Also, deporting illegal immigrants can be politically unpopular. Convicted criminals are both easy to find and no one will get too upset when they get deported.Because we still want Mexicans here to ...
Charcoal is made from wood, and wood is a renewable resource, so why can't we burn charcoal for energy instead of regual coal?
Coal is much more efficient to burn. Also trees absorb CO2 and burning wood releases the CO2 into the atmosphere. Not that coal doesn't release CO2, but it makes more sense to burn coal.Its a very dirty way to make fuel. Anthracite coal is dirty, charcoal is worse.
Why are different elements so different?
A lone carbon atom or a lone nitrogen atom doesn't really exist in nature For example diamond, and graphite are both only made out of carbon atoms. One is a precious stone, the other comes in pencils you can buy a box of for two dollars. The key here is that the atoms are forming larger molecules. Each carbon atom can ...
What are the "sensitive electronics" inside a passport?
And, indeed, it contains your whole passport information, including a photo, a temptation that identity thieves may find it hard to resist. There now exist plenty of shielded bags in which to keep your passport when not actually displaying it to some appropriate official. Failing that, wrap it in kitchen foil. Don't be...
Why is testifying under oath a big deal?
> I don't see how this oath thing is going to stop these politicians from lying again. Lying under oath is a criminal offense. If they are caught lying then they can be stripped of office and go to jail for a long time.Because lying under oath is called perjury and its very illegal. Meaning if someone says a provable l...
Why is it 'bad' to give kids soda/sweets?
While orange juice has a lot of sugar, it also has a lot of vitamins where Coke has almost none. But there's a more important point: kids given healthy food as children are more likely to eat healthier food as adults. If you're raised on processed, salt-laden food and soda, as an adult you are much less likely to eat a...
Why has Europe, historically, always been at war with itself?
Too many nations close to each other leaves land locked nations that needs a strong army to protect itself since it does not have a navy. This leads to build up and eventually invasion when they realize that nations with ports hold alot more economic power. Having access to the sea/ocean really allows you to bully land...
Why does mixing drinks, give you a worse hangover???
My fraternity had a university professor come out and discuss drinking with us and did a Q & A. A large part of the Q & A was about hangoversBasically they don't really know what causes hangovers, but there's three suspects. Dehydration, Sugar, and some chemical that makes alcohol dark My guess is the sugar, and maybe ...
Recreational use of Marijuana. (Washington State)
if its anything like the other states to legalize, any person 21+ would be able to purchase marijuana only from approved retailers, who have already registered with the state. You wouldn't need a card, except for your photo ID, even out of state ID's should be fine. As for jobs, they can definitely still fire you for f...
Why are software companies shifting to subscription packages rather than outright purchases?
A lot of responses say 'money' but if you break it down, companies that upgrade regularly [may actually end up spending less]. Adobe, for example, have priced Creative Cloud in such a way that three years subscription is approximately equivalent to the old CS6 Design Standard . The operating costs for Creative Cloud ar...
how does a TV cable carry video signals for 200+ full-motion, many of them HD and digital channels simultaneously?
cable can go to nearly 1.5 Mbits/s on a good day. HD channel are averaging 600-800k/s, SD channel about half of that, its also why it takes longer for a HD channel to load than a HD channel keep in mind ''HD'' is thrown around very loosely these days, ANYTHING higher than 480p is now called HD basically. for video : HD...
Why is everyone banning Uber?
When I had tutu get a taxi ride to the airport I could of actually had access to who my driver was, what his driving record was like, and how long he's been driving a taxi. On top of that more than 1 person know of who I was and where I was going. If something were to happen to me or the driver then someone else knows ...
Why are school buses and city buses shaped differently?
School buses don't look any different to any other bus in Australia, so it must be a North American thing. Some laws or regulations that say school buses must look different. Outside North America they just use charter buses or city buses for school bus routes.School buses have been standardized by law, as their are sp...
How come when I slap the crap out of a fly, ROCKING its world, but it doesn't get KO'd or get a concussion?
I have the same problem. This is what I use. _URL_0_ Bonus: if the Hellgates are opened you're ready to battle demons. Source: supernatural seasons, 1-9", 'Your hand has a air "force field" in front of it from moving so fast, fly swatters #wreck the fly because the holes in the plastic part that you hit them with allow...
if what were seeing when our eyes are open is a reflection of light, how are we "seeing" things when our eyes are shut, like when under hallucinogens for example?
When you're tripping on a psychedelic substance and you are seeing different things while you're eyes are closed, you are not seeing those things with your eyes. When your eyes are open and you are looking at an object, your eyes are essentially interpreting the different reflections of light and sending that signal to...
Why do most aeroplane hangars have curved roofs regardless of their size?
Dome is indeed stronger that arch, its also significantly more expensive, longer, and harder to build, while the need for such extra durability is aren't exist. you gonna need so many stuff in order to build a dome hangar such as extra heavy lifting, extra precision, and extra professionals help. While arch just need l...
The difference between Information Technology, Computer Science, and Software Engineering degrees
Computer Science - How a computer works. For example, processors, ram etc. Very mathematical The best way to compare IT and software engineering is like this - A software engineer builds a car while an IT person uses the car. EDIT - There is obviously a lot more detail behind it but i'm not sure how much detail you wan...
the argument that rape is about power, not sex
It's based on 1970s feminist theory. It's a theoretical way of trying to show how devastating rape is to a woman who experienced it and to women in general. > Beginning in the 1970s this scientific analysis of rape as sexually desirable for victims was challenged by feminist writers. [ ] Feminist theorists [ ] emphasiz...
If lava can melt rock, how do volcanos hold the lava?
They don't technically, they form when lava breaches and cools rapidly. This makes them into mauntain shapes, they erupt when pressure from Laval build up is too great, and since the newer rock at the top is less hard than the bottom rock it explodes at the top and repeats that cycle
Why aren't premature ventricular contractions a thing you should worry about?
I'm also interested in this. After having a loop recorder implanted two years ago for what I thought was A-fib, I was told I have PACs and PVCs. When it happens, I feel like my heart is being crushed and am afraid it won't go back into rhythm. Why does my cardiologist not seem worried?
Why is there a separate league for men and women in chess in the year 2015?
I might get down voted to hell for this, but it is 100% a case of 'we want gender equality when it suits us'. Logically there is no reason why a woman is worse at chess. A woman can be number one if she is good enough. Less women play chess though, and a smaller pool produces less top tier players, so they get their ow...
Why are so many things that feel good bad for us?
I think that ,just like with sugar, liking those things distracts us in the moment. We do what we like and we do what's comfortable. Other bad things aren't as much an issue because we don't like them. It's liking them that causes the issues.
How bad is coke for you?
It just has a lot of calories for a beverage. 3 cans is about 450 calories, which is 25% of the daily amount needed for an average, healthy adult. If you eat less to compensate, you'll be fine. Also, the acidity is bad for your teeth. You should rinse your mouth out with water after drinking it and/or brush 30 minutes ...
What was Portugal like before they legalized drugs? What have been the effects, both positive and negative? Can similar policies be adopted by other nations?
I don't have a ELI5 explanation, but I do know of some good articles that have been written on the subject. Hopefully it helps someone else sum it up, but generally it's been a good thing. [Spiegel's] Portugal, 12 years after decriminalizing drugs [Washington Post's] Why hardly anyone dies form a drug overdose in Portu...
Why can't anxiety disorders be cured?
The problem is that the brain is complicated enough that we can't figure out what causes anxiety disorders or other mental disorders. Today's technology can treat individual symptoms, but that's it.
How to thrusters in space work if there's no air resistance?
It works by conservation of momentum. When the fuel is ignited, a certain mass of its combustion products are ejected out of the back of the rocket, at a certain speed. So the total momentum of that mass is -mv, taking the rocket's forward direction to be positive. Therefore, the rocket must increase its own FORWARD mo...
How much would the Mona Lisa be worth?
Exactly as much as someone's willing to pay for it. Because the Mona Lisa has never been sold*, we don't know that figure. But the Mona Lisa has been insured for $100 million in 1962 . So that's a rough approximation of its market value. *the painting was sold in the 1500s to King Francois I of France for 4000 ecus
What causes a motorcycle "death wobble" and what can be done to prevent it?
Change your valve stems regularly even if they look fine. My stepdad and mom were at 65 on the interstate when the back tire suddenly deflated due to deteriorated valve stem. Bike started wobbling and ended up wrenching the front wheel fully sideways resulting in a tail over nose roll that catapulted my Mom. She was in...