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Why is it that a temperature like 80°F seems really hot at the beginning of the Summer, but cool by the end? | *"Homeostasis : The ability of the body or a cell to seek and maintain a condition of equilibrium or stability within its internal environment when dealing with external changes"* In the summer your body gets used to temperatures 90F+; The way it gets used to these temperatures is that your body tries to keep its core ... |
If I wake-up, have breakfast, and try to go back to sleep, my body resists by giving me fatigue, slight pain and an increased heart rate. Why does this happen? | Increased heart rate, sudden burst of energy and wakefullness is normal. You just ate and you are starting the digestion process so your stomach needs more blood for the cells to produces acids and do their stuff. Now fatigue and slight pain? I'm no expert but I don't think it's usual Discomfort maybe? If you lay down ... |
Why don't fish freeze when the water above does? | The ice above forms an insulative barrier to keep in the heat from the Earth below and in a bizarre twist the water below the ice is actually slightly above freezing. Some fish, being cold blooded creatures adapt to this situation.Antarctic icefish are a family of fish that are unique because they have no hemoglobin. T... |
Why you need to put cold water/anything cold on a burn. | Your body is a piece of meat that is being cooked and you need to stop it from cooking.Well for one it absorbs the heat from the burn, and then numbs it so it doesn't hurt as much.Just so you know, you shouldn't put "cold" anything on a burn. It should be "cool." Cold shocks the skin and makes it worse.I remember being... |
How do snipers account for wind and gravity on long-range shots? | Lots and lots of practise in differing conditions. Long shots require elevation to compensate for the drop due to gravity, also you need fire at where they will be and not where they are nowComputers. Specifically Ballistic Trajectory Computers. [Chris Kyle talks about the shot on an interview with Conan], and how much... |
Why Do Some Sites Require Credit Card CCV Numbers, and Others (like Amazon) Do Not? | The CVV2 number isn't *required* to charge the card, but it reduces the risk of fraud. If the transaction is fraudulent, the merchant might end up having to pay fees or fines to their payment processor, so merchants have an incentive to check CVV2s. But if they don't want to and are willing to risk more chargebacks, th... |
How does a torrent ever get seeders if it can't be downloaded when it has 0 seeders? | The person that starts the torrent is the first seederYou can still finish a Torrent with zero seeders. So long as all the leechers have all the separate pieces of the file, they can Voltron it up and complete the torrentThe first person that uploads the torrent is the first seeder. However, if that person is logged of... |
If 12 years of war has cost us 6 trillion dollars, what have we GAINED financially? Is there a net gain or loss? | I am unable to provide a solid explanation on the 12 year war that you are referring to but, maybe I can provide a typical ELI5 explanation on war and whats the main benefit of it. War is considered as a financial injection to a country that is one of the leading ones on the world. Why? Because every contry that achiev... |
Why is the Panama Paper's leak not being extensively covered by American news media outlets? | Because it's difficult to understand and boring. Now how about that Trump!? It's like he's sayin' whut we all thinking!", 'Americans generally dont care. Well the people who watch mainstream media dont really care, so why should they spend time reporting on it. Also, the people who run the mainstream media likely dont ... |
How can I set up a corporation to purchase my (and everyone else’s) student loan debt and then dissolve the corporation via bankruptcy? | Nice try, but that won't work. To buy up the debt, your corporation's going to need money. It doesn't have any, so it'll have to either take out a loan from a bank, or sell shares in the corporation to raise some. The bank and the investors are going to ask, "what's your business plan to pay us back?" When you as the C... |
Why Australia is protesting right now and what are they protesting over? | There are a number of issues that people were protesting, but overall it was to show that they feel that the current government is malicious and incompetent due to their policies, comments, and broken promises. This is to do with things like education funding, worker's rights, public assets, social security, and the en... |
How can the US be trillions in debt but still able to spend over 600 billion in its army? | Most US debt is owed back to whoever owns it on a set basis. The debt owners will be repaid according to a set schedule. There’s no super bank ready to foreclose on the US government or that controls all US debt. What this means is that the US has to set aside enough each year to pay its debt obligations for that year.... |
Why are you required to take the full course of antibiotics even if you start to feel better? | to ensure that the bacteria are all dead. if you take antibiotics, and stop once you feel better, that doesn't ensure they are all dead. those that survive, could develop resistances to the drugs. |
'Modern humans' have existed for 130 to 300 thousand years. Why then do nearly all modern cultures seem to stem back no more than 6,000 years in origin? | Because we spent a very long time pissing about in small little family units getting eaten by wolves and fornicating like primitive pre-civilization primates do. Civilization, or something that we could reasonably call the start of it, occurred around 12,000 years ago when humans finally stopped roaming in an area of t... |
Why are most of the world's deserts covered in sand and not just dry soil? | Soil is largely made of sand , organic matter, water, and gas. When you don't have precipitation, you lose out on organic matter and water, so you're left with minerals and rocks that form sand.Most of the world's deserts are actually covered in **snow or ice** . When deserts form, it is because of a lack of moisture. ... |
How are we making higher capacity HDDs year over year while keeping them the same size (or even making them smaller)? | Don't think of it like storing water in a bucket - water is a physical thing that has a more or less fixed size. We aren't storing a physical thing, we're storing data. Data is abstract and in theory doesn't have any density or size in physical dimensions. Because of this data doesn't have to be stored in a fixed-sized... |
What's the best way to wash blueberries? | Stick 'em in the sieve, rinse 'em, an you're done.Uhm, yeah. Just rinse them in water real quick. No need to get fancy unless you previously coated them with mercury or somethingJust rinse the fruits little zzxzzeyz. There is no need for soap, in fact that may just give you the green apple splatter.Someone has misinfor... |
Why do our mouths salivate right before throwing up? | Since stomach contents are highly acidic, vomiting can be quite harmful for the throat, mouth and teeth and salivating helps to reduce this by diluting and rinsing. Saliva is also weakly alkaline, which helps to neutralize acidYour body is smart. Vomit is really acidic and can burn your esophagus. The salivation lines ... |
Why are girls in middle school and high school almost always generally more mature than guys in high school and middle school? | They really are not. Girls tend to be socialized more so they may present the appearance of maturity more often, but they are in no way any more mature on average that boys their age are.It appears that girls' brains are typically going through an organizational stage at 10 to 12 that boys' brains don't typically reach... |
What biologically is happening inside trees that causes them to bloom after a week of warm weather? | you quite answered by yourself: Normally we have modeled the phenomenon with the [Degree day] which is somewhat the energy taken in a certain period of time. Of course the answer is much more complex of this *because* in reality there are many ways plants adopted to control the blooming, depending on where the habitat ... |
why does urinating on a lemon tree help it grow? | Hold up ..WHA?????? lol Ok I know nothing of this legend BUT i do know that urine will break down into Nitrogen, phosphorus and potassium with many trace minerals. so in that respect it is actually one hell of a good fertilizer for any plant. If the salts were an issue there would be many a dead tree in dog parks . Giv... |
Is it truly possible to make a computer program that deletes its entire self and any evidence it was there in the first place? | Remember that the executing program is in memory, so it can delete any copy off the disk or whatever it loaded from, then reboot the system, which clears the memorySure, if the evidence it was there is all stored on the computer.Yes! In fact, it shouldn't be too hard. Since you know coding, I can talk a little more lik... |
Why don't US citizens get to vote about entering Syria? | Because the United States federal government is a Republic, not a Democracy. In particular, it is not a direct democracy where citizens vote on everythingTechnically we "did" vote on it. We chose to elect Obama, the 100 Senators and the 435 Members of the House. By electing them to their positions we placed vested in t... |
Why does the post office have a key to the apt. building but UPS/FedEx don't? | depends on the building I would imagine as my Fedex and UPS guys have access to the buildings also. |
How do rappers like Wiz Khalifa who do drugs on occasion, even tweet and post pictures of their drugs manage to not get arrested? | A picture doesn't actually tell you that they're doing drugs - not even a video is actual proof. All they would need to do is say, "I have an image and I was just acting. That wasn't really cocaine/meth/weed." If it's a white powder it could sugar, flour, or chalk dust. Tweets are the same way. Just because you say you... |
Why haven't Native Americans moved away from reservations and into cities where they might be better off? | Basically since the 1850s we have pushed them further and further until in the 1890s when the Dawes Severalty Act was passed, the government paid them for land and separated tribes and what not. Well years pass, and they gradually get less land, and finally permanent reservations are established, but by this time; nati... |
Why all the planets are turning in the same direction | They dont . Venus, Uranus rotate clockwise, the rest rotate counter-clockwise. When the solar system was first forming, it was nothing but a giant cloud of dust, and because of gravity and the Sun, it had a counter-clockwise spin to it, and as the planets began to form, they kept this rotation, which is why they all re... |
Why is touching a computer screen such a big deal? | oil on fingers and all your finger shit gets on my pretty screen and I have to wipe it off. My pretty screen takes a lot of maintanence and careful wiping to keep it smudge free. Then you come in with your cheeto fingers and now there are orange smudges where my spreadsheet folder is. nerdhulk is angry but to beta to d... |
Why do we expect cats to come home after being let out but not dogs? | * cats don't have the same sense of territory that makes dogs roam and mark* cats don't pose a serious danger to people, so letting them out doesn't threaten anyone* cats can climb, jump over, or crawl through obstacles dogs can't |
The difference between HIV and AIDS | HIV is a virus, AIDS is a condition. HIV the virus destroy a certain kind of immune cells that helps make antibodies, molecules that identify and tag diseases so other cells can destroy them. So when cells die you can't make antibodies. When enough of these cells die , you are said to have AIDS. TLDR; HIV is a virus, A... |
Why aren't human races classified as species like animals are? | There is greater genetic difference between two individuals than there are between the "races", the concept of race is fundamentally superficial genetically speaking, in fact humans are one of the most homogeneous species known to exist For two animals to be considered different species, they must not be able to produc... |
Why is Contemporary art held in museums but all other art is held and shown in galleries? | I think your straw poll may have misled you the artists you describe generally have their art in museums, not galleries. For example, Da Vinci art in museums . Contemporary art can be in both galleries and museums. I believe it has to do with the intent of the art. Museums are for viewing. Art Galleries are for purchas... |
What would happen if everyone maxed out all of their credit cards at once? | I like this question, generally banks or lending institutions extend lines of credit, but use statistical algorithms to decide how much money to keep available, so it's possible Visa might run out of money, since this is an essentially impossible occurrence, for which they are not prepared. |
How do leggings keep somebody warm in the fall and winter months? | Short answer: Fashion is about making sacrifices, and its no wonder women always complain about being cold. Long answer: Its a factor of a number of things. Women shave their legs, and hair is specifically designed to keep people warm. Leggings do a number of things. first, they act as insulation, by helping to trap he... |
Why is it that anytime I'm interested/thinking about a certain thing, I find references to them in real life? | Basically you weren't looking for it before, but now that its in your subconscious, you notice and process it, giving the illusion of frequency. This is called the [Baader-Meinhof Phenomenon]. |
How do spicy foods like wasabi kill bacteria? | The active ingredient is [Allyl isothiocyanate] which is mainly to deter animals - caterpillars etc. and larger animals like grazers - from eating the plant. It harms bacteria too by damaging their cell membranes, which are the outer containers holding all the machinery inside their cells. When this membrane is damaged... |
What is my belly button currently attached to, and does it serve a purpose anymore? | Your belly button is where your umbilical arteries/vein connected to the placenta via the umbilical cord. After birth they shrivel up and become ligaments , the arteries becoming the [medial umbilical ligament] and vein becoming the [round ligament of the liver]. They don't do anything post-birth. |
How do unripe bananas develop at home? | They're fully grown before they start to ripen. The ripening process is caused by the plant growth regulator 'ethylene', and begins to turn starch in the banana into sugar. Bananas are not the only fruit to work this way . It's a common survival strategy because it lets you make sure your seeds and fruit are fully matu... |
why dont ants drown when it rains? | My understanding: First, in a rainstorm, lots of ants drown. Even being well prepared for an event like a flood doesn't mean everyone survives, and not every plan is executed perfectly. The best laid plans of ants and men, etc . . . Second, different species take different approaches. Some fire ants just link legs/arms... |
When a player gets injured in the NBA, what happens to his salary? Does he still get paid out the full amount? | > I don't really think it's fair to pay Since when did your concept of fairness enter into the equation? |
How come anti-trust/monopoly laws are no longer pursued in the United States? | They are actually enforced more than they *ever* have been. Its just a much more complex and "known" situation now, that its very very uninteresting to report on for the media, so unless you're very inovolved in how this stuff works in specific industries of business, you'll probably never hear about all of the stuff g... |
If it's illegal to not have auto-insurance, why doesn't the government control and regulate auto-insurance as a Tax, rather than letting private companies sell you a mandatory service? | The government *does* regulate and control auto insuranceIn Canada, vehicle registration includes the cost of mandatory minimum liability insurance. It works pretty well. Why not in the US? Politics. In the same way that Obamacare forces us to get insurance through private, for-profit companies, the insurance lobby & t... |
Why does adding vanilla to boiling sugar (like when making fudge) cause it to bubble/boil rapidly? | Sugar-water has a higher boiling point than pure water, and the more sugar is dissolved, the higher that point is. So when you've got boiling syrup, it might be 230 or 240 degrees . When you pour vanilla extract onto something that hot, it's *going* to boil, since it's got an even lower boiling point than water, since ... |
Why is dip commonly used in sports? | nicotine is an upper similar to amphetamines that improve performance, and since tobacco is legal, a lot of people use it. dip just happens to be a more socially acceptable way of getting tobacco |
How does traction control on a car work? | You can think of traction control as basically ABS in reverse. When you accelerate, the car senses whether the tires are slipping on the pavement. If they are, it will automatically adjust the throttle to help them keep tractionTraction control is basically the opposite of the Anti-blocking system that almost every mod... |
Why do fan power knobs go 0-3-2-1 | Things like well pumps have electric motors like fans do. They require a capacitor to get the motor going and then the normal current can sustain it. Like how you can't start in 5th gear but you can drive in fifth gear after you get going. Fans have this configuration to extend the life of the fan. They can normally st... |
Why do construction workers use big tall tower things to pour concrete? Pic Inside | That's called a [concrete pump]. It's used when you need to inject pressurized concrete someplace rather than just pouring it. If you're filling an underground hole with concrete to be the base of a pillar, for example, then if you just pour it into the hole it might not fill every nook and cranny. Pumping it in under ... |
Why does it seem like video games from the newest generation seem to have far more bugs and glitches than previous generation games? | A few factors * New games are way more complex. This means more code, and as the number of bugs per LoC is pretty static you get more bugs.* Today it is pretty trivial to push patches to the users as they have fast internet.* Deadlines have become a bigger factor esp. when it comes to franchise titles.Video games are b... |
Why do India and China have such massive populations in comparison to the rest of the world? | I'm almost certain this has been answered before, but it's largely due to geography. India and China both have exceptionally fertile river valleys capable of supporting large populations with pre-industrial technology. Even before the world population started exploding during the past two centuries, they were the two l... |
How do people build all those machines that carve different custom details? Do they invent them every time? | A machine like the one that makes the spring in your example is a collection of different technologies combined into a new system (pneumatic arms, motorized discs, etc. "Carving" would be more along the lines of a CNC mill or lathe, a laser cutter, or water jet machine that has programmable paths. |
"this video is not available on mobile devices/in your country" on YouTube | One big factor: advertising. Say Burger King has a deal with the owner of the video that they will run an add before it every time it is played. However advertising laws vary from country to country and are very complex. For example, my country does not allow fast food advertising aimed at children. So it's simpler for... |
What the whole "Cake is a lie" business was all about. | During Portal, the psychotic AI promises you cake after the test. However, as you go through the tests and discover the depth of corruption in the facility and GLaDOS herself, you see messages from a man named "Rattman". He leaves messages saying "The cake is a lie." This just sort of caught on with fans of Portal. The... |
Can a business refuse to sell stock to a person or company? | If a company is publicly traded, like on one of the stock exchanges, they can't control who buys stock in them. A closely held company, like a family business, generally can. In between, there is lots of room for lawyers to argue.So long as the reason you are refusing service is not due to the person being of a protect... |
Why babies are capable of learning a language so easily | During early development, the brain is much more plastic, meaning making new connections, erasing old ones, and rearranging existing ones is much easier. Also, because babies don't have any language when they are born, it is believed it is much easier for them to identify and remember the vowel sounds used in a languag... |
Why are we so good at telling apart different people, but so bad at telling apart different animals of the same species? Do humans just have more variance in appearance? | We're biologically pre-disposed to be able to tell human faces apart . I'm not sure what studies have proved this to be the same in other animals, but they obviously can. Dogs can tell each other apart from their scent . I believe it's because due to natural selection, those who could tell different people apart would ... |
How is the routing number on a check used? | A check is an instruction by you to your bank: when the person named on the check requests it, pay them the amount indicated on the check, from the bank account of which the number is on the check. This means that at the end of the day, it's always your bank cashing the check. But it's convenient if the person you want... |
The South Australian Statewide power outage and upstream transmission supply of power | It means all in-state power plants are offline and the lines that bring power in from out of state are down aswell, they may physically be damaged or they cant handle that amount of power so they shut them off so they dont burn up', "An electrical grid relies on a balance of consumption and production of electricity. I... |
What is it in most animals that makes them "shut down" with a blindfold on? | You try walking around with a blindfold on and see how long it takes for you to hurt yourself. Now amplify the fear you should feel by a million because animals don't have hospitals and minor injuries can easily be fatal. Also, there are things that will eat them. There aren't things that would eat humans really. They ... |
What are the causes of the Great Depression? | The Great Depression was caused by many factors but one of the largest was a gross misuse of credit. Basically in the 1920s people began buying things on credit This was all well and good but there where no real safety measures in place and people spent much MUCH more then they actually had. The result was an incredibl... |
Why don't the radio waves used to transmit information all superpose? | They do superpose in the most general sense, but a radio receiver has a circuit that filters out everything but the frequency it wants.Like every single device on a different bandwith? That would be impossible, we don't have enough usable bandwith for that. Every type of device on a different frequency? That is already... |
Short of shutting down entire city blocks, how do they film street/public setting movie scenes without getting the crowds of gawking people in the shot? | I know the question states "short of shutting down entire city blocks" but I think the best answer is they shut down entire city blocksIn addition to what a lot of people on here have already said, a lot of it is Green Sceen, they just add the backdrop in afterwards, so they can make it look like somewhere recognisable... |
Why does my cat sometimes run around the house like a maniac? | Cats are made for a world that punishes unecessary use of energy. They sleep to save up energy for their hunt, usually hunting is done at night. In a domestic enviroment the cat doesnt "need" to hunt but its energysaving ways are hardwired. All that energy needs to go somewhere and they will handle it by running around... |
Why do we eat different foods depending on the time of the day? i.e. cereal for breakfast, burgers for lunch/dinner | It's purely cultural. Check out these [articles] on [breakfast around the world] --- people in different places eat lots of different stuff for breakfast. There are some trends --- pretty much everybody wants something easy to prepare , people in cold weather places tend to eat hot, filling things people in hot weather... |
What is a lame-duck Congress (United States) | In politics, "Lame Duck" is used to describe to period of time between an Election and when the winners of that election assume office. A President who lost or did not campaign for a Second Term in November, for example, is called a "Lame Duck President" until the new President takes office in January. A Lame-Duck Cong... |
ELIS I know it's a bit late but how exactly did the Lehman Brothers go bankrupt? | the housing market crashed happened when people agreed to adjustable rate mortgages that they couldn't afford. before these mortgages defaulted, lehman brothers bought these mortgages that were lumped in with other debt and rated higher that they actually were. standards & poor's was basically bribed into doing so and ... |
Why is fire used to make land fertile? Wouldn't the heat from the flames cause a dust bowl effect? | Fire is GOOD for nature for many reasons; you may have heard that coniferous trees will only spread their seeds when the heat from a fire melts the resins in the cones and allows them to open up. Fire is also beneficial in that, once the trees are burned, the remaining ashes contain lots of nutrients that will aid in t... |
Why is blood red but do our veins look blue? | The fat under your skin absorbs low frequency light. The higher frequency blue wavelengths are what you see while the lower reds are filtered out. Some people try to spread the old wives tale that blood is blue when it's in your veins, but that is not the case. |
Why do people's personalities change when they experience memory loss or brain damage? | Because your brain has your personality in it. If a bullet goes through your brain and damages it, you'll be missing a significant amount of pathways that were present before. |
Why isn't car bodywork made from stainless steel? | Because its too expensive. But that didn't stop DMC from building the deLorean. Thank goodness for poor business decisions.Because the cost of making the entire body from stainless steel would drive the price up out of range for most peopleSeveral reasons: 1. Stainless steel is expensive, about 50% more per pound than ... |
What would happen if all bacteria was removed from my body? | The vast majority of cells in your body are bacterial cells , so the effects of removing all bacteria would be widespread and effectively leave us unable to survive. Removing bacteria from the gut would prevent absorption of many vital nutrients. This is actually one of the dangers of taking antibiotics too aggressivel... |
How does radiation do damage to your body? | Low-energy radiation isn't dangerous because it has so little energy. Getting pelted by photons from a lamp is like having sand thrown at you, it simply cannot harm you. If radio waves are comparable to sand then the other end of the spectrum are .50cal rounds. They impart enough energy to physically break down your ce... |
how a "stimulus package" helps out the economy. | What you have described is known as "quantitative easing". A stimulus is when the government takes out a bunch of loans and uses that money to buy things, often paying for infrastructure improvements . You may have noticed a lot of road work on the highway recently This is likely stimulus money at work. **ELI5 Part:**T... |
What are the students protesting against in Taiwan currently which resorted to them "invading" the cabinet compound of their Government? | i really dont have a good enough handle to be doing this on ELI5, but here goes: 1) the main issue at hand which most directly sparked the sit-in protest was Service Agreement with China that Gigatergar mentioned.having promised the public last June that it would be reviewed article by article, the KMT ruling party ins... |
Does laying in bed resting before you sleep actually do anything to rejuvinate your body for the upcoming day? | Sleep is mostly important to renew the brain neurotransmitters and do some housekeeping around the brain. When you think about it, sleep is mostly about shutting down your consciousness. We are only starting to understand what really happens in the brain during sleep. Conclusion: laying in bed is rejuvenating your body... |
Why does our fingernails have faint lines going up and down? | well first you should know that its normal. Evenly spaced vertical lines are never a sign of a problem What happens is that as you get older, parts of the nail matrix atrophy. They become weak and dont function quite as well. This results in the increasingly prominent vertical ridges. They're very similar in this way t... |
(Serious) Can a person get rid of their freckles? | Just as a reminder, the [Serious] tag isn't required here on ELI5. All questions here are assumed serious. /uncalled for mod |
Why do(almost) all police cars use the same car/model? | Only a few cars are designed to be turned into police cars. They have to have more powerful engines, brakes, electrical systems, alternators, plus they have to have adjustments you may not even think of. For example, my Charger has a really wide center console because standard police equipment like radios are 9" wide. ... |
When floating in space, or any zero gravity environment, would a person always feel as if they were standing upright? | You would feel as though you were falling. "Zero-gravity" actually means you are in free fall, or in a motion that imitates free fall, such as the planes that fly in steep parabolic arcs to simulate zero-g for short periods of time without having to go into orbit. Imagine you jump down an elevator shaft that just goes ... |
what happens if you leave the microwave door open and it's turned on? | Microwaves are electromagnetic radiation with fairly large wavelength. If you take away the spinning mechanism and put in something like a block of cheese, you'll pretty reliably be able to see that the heat will most be applied in certain sections. If you measure the distance between those sections, you'll be able to ... |
"Happy" music versus "Dark, depressing" music. Why do we see either as being such? What makes a certain combination of notes fit in either category? | There is a learned history involved. Music and language are very closely related. Think of someone expressing sorrow or sympathy in a western language. Often there is a sigh, which falls down slightly with the sound going softer. Now listen to the lachrymosa from the Requiem by Mozart and you can hear this sigh in the ... |
What's the opioid crisis? | I work in healthcare. The opioid crisis is this situation in America where it is seen that providers are prescribing opioids much more liberally than how they should. There are several studies that show how addictive these opioids can be and that innocent people can become addicted with a simple 5-7 day dose following ... |
Sometimes my rings feel more loose on my fingers then other times, why? | Finger tissue swelling/shrinkage. Rings will allwsys be looser in cold conditions. Somebody else wanna take the "it must be cold in here" dick joke??', "Joints swell throughout the day. We'll typically move around about half a ring size on either side of average. Everything from temperature to blood pressure to exercis... |
What happens when you "see stars"? | When you hit the back of your head, you're hitting the part of your brain that perceives vision, this can temporarily disorient you and cause little "stars" to appear in your vision', "Light takes time to travel. The light from our sun is more than 8 minutes old when it reaches us. Other stars are REALLY far away, Ligh... |
Why do our faces turn red when we are embarrassed? | Your body thinks embarassment is a threat. It triggers adrenaline to help you fight the threat. Adrenaline dilates your blood vessels so you get more oxygen and blood to use so you can fight or run. Blood rushing to your face makes you look red. |
Why are cops in the US allowed to break into your house without a warrant when there's a party? | They aren't. They do not have the lawful authority to break into *any* private structure, business or residential, in the absence of something called *exigent circumstances.* Basically, an exigent circumstance is any situation in which *not* acting creates an unreasonable risk of harm to something or somebody. If a pol... |
The reasoning behind Mormon polygamy. | For what it's worth, here's [the Church's official explanation]. Consider the source, obviously, but you sometimes see claims of one official reason or another and this is the only real official answer I suspect you'll find.Short answer: Joseph Smith wanted to have multiple wives and he was in the position where he had... |
How do we forget? | First let's look at how we remember things, then we'll work backwards. Remember in class when you were asked to make a "brain storm" where you would draw a circle and write something in it? Then as you came up with more ideas you 'd draw more circles, and you would connect them with lines? Memories kind of work the sam... |
Why is haggling something that just doesn't happen any more? | Market efficiency in action. Used to be if I wanted to buy something, I didn't have a lot of choices. There were no supermarkets or shopping malls, and I was pretty much stuck with wherever I was willing to walk to. If a seller was charging more than I wanted to pay, I couldn't just go somewhere else. Luckily, the sell... |
Why are computer and calculator number pads in the opposite order of phone keypads? | The original calculator had a 1x9 column of number buttons for each digit, with 1 at the bottom and 9 at the top. To make an 8 digit calculator you had 8 "5" keys in a row. When calculator people figured you could use one "5" key if you did numbers in order with a "0" key, they folded the 1x9 up into a 3x3 grid with a ... |
Why are autopsies almost always definitive? How come they can give answers when biopsies and other medical procedures can't? | Sometimes, trying to cure a living person is like working on a car while it's still running. There are a lot of limits to what can be done without being too invasive. When the car is turned off you can delve endlessly into researching the engine, taking things apart and so on without being limited to what you can do wi... |
Why do some people get incredibly grumpy when they are hungry? | It could be an effect of hypoglycemia . Take a look at this list of symptoms on the wiki page: _URL_0_While many factors contribute to this "Hangryness", it's believed that a large part of this aggression is caused by a droop in [serotonin levels.] Serotonin is what is called a neurotransmitter, a specific substance th... |
When was the 'first' Monday? | As pointed out there is some vagary in your question, but I'm going to go with "some time around the first century AD". This is when the Romans started to switch from the 8 day week to 7 day a week, and moved from using simple letters to denote days of the week to using celestial bodies. This is when the second day of ... |
What should an adult do if they are being assaulted by a minor? | Flee or defend themselves. You can defend yourself against anyone, minor or noti read that he spit on your car etc etc. the simple answer to your question is this:you may only enter combat after all other options are exhausted. example: leaving, backing away, saying please dont assault me. and even when it is ok to def... |
What makes the F-14 so loved and the F-35 so hated? | F-14 takes you on a highway to the danger zone F-35 will not.The F-14 wasn't an important step in aviation history; it was just a very large, expensive jet that was very capable; it was to the Navy as the F-22 is to the USAF today. The biggest difference though: The F-14 came about during the Cold War; the USSR was a r... |
why do we feel energized after shower? | Hot showers relaxes muscles and releases oxytocin -which eases stress-. Cold showers, on the other hand, put the brain on an alert state, thus "waking" or "energizing" -as you said- the body. I believe you refer to the latter. EDIT: As mentioned by u/Weaponomics, cold showers also stimulate blood flow.I don't know abou... |
How does an Etch-a-sketch work? | The inside of an etch-a-sketch is filled with a very fine powder that clings to the transparent screen at the front, the 2 knobs direct a small stylus to scrape the powder off of the screen, allowing you to draw. By shaking it, you redistribute the powder and fully coat the front of the screen again. |
Didn't we know there was water on Mars? | The Martian "ice" caps are actually frozen CO2, not H2O. The Curiosity rover has found H2O on Mars. |
Why couldn't artists 500+ years ago achieve the same level of detail as artists today? | I heard it had a lot to do with the invention / discovery of the camera obscura. This helped people understand perspective / proportions / etc better. Here's a quick article I found about it - but there are a ton of others, videos, books, etc that talk about it in more depth. _URL_0_", 'What do you mean? [This looks pr... |
What makes some humans generally considered more attractive than others? | It is just a tool of evolution. We are programmed to seek out optimal mates for reproducing, and we can dicern more than just physical attributes from looks. Just over 200 years ago, being obese to morbidly obese was considered very attractive, because it meant their family was wealthy and could afford to eat enough to... |
Can a piece of toilet paper absorb the same amount of water after a cycle of wet-dry-wet? | Probably not. Toilet paper is designed to break up in water. I would expect the gaps in the fibers, the gaps that hold the water, would collapse as it soaks, leaving less volume for water retention after drying out. |
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