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|---|---|---|---|---|---|---|---|---|---|---|
la1dgi
|
When we think about falling, why does our body feel like we’re falling sometimes?
|
This happens to me occasionally in bed. I think about falling and my body gives a sort of response to it by making me actually feel like I’m falling. How does this happen?
|
Biology
|
explainlikeimfive
|
[
"gll9ctc",
"gllikgv",
"glm5g3r"
] |
[
"For the same reason that thinking about a salty cracker can make one salivate. The body takes cues from mental processes about matters real and imagined."
] |
[
11
] |
[
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
aqn5le
|
Why has it been so slow and difficult to get voice and SMS over LTE?
|
Even as we approach 5G deployment, many carriers who have had LTE for years don't have VoLTE, and those that do often limit it to a few specific handset models. What are the challenges that explain this slow roll out?
|
Technology
|
explainlikeimfive
|
[
"egh5fhq"
] |
[
"Its primarily needs and economics based. No one is really asking for this stuff, it doesn't really change anything or meet any different needs than is already being met in the market by carriers and phones, and thus there is little reason to invest in the changes necessary to make this happen fast. If you want it done fast, its gonna cost money, but its fairly useless to start investing money into something that no one really wants or needs and isn't going to have a good return on that investment. It can wait."
] |
[
3
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
dhbe7u
|
How does the “overhead car view” camera work?
|
Technology
|
explainlikeimfive
|
[
"f3lomiq",
"f3m3thk",
"f3m5r94",
"f3n0icc"
] |
[
"Some software stitches together all of the other camera views to make a view of the whole area around the car."
] |
[
44
] |
[
[],
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
gftjiw
|
How does your skin grow back when you get a cut or injury? How does your body know?
|
Biology
|
explainlikeimfive
|
[
"fpvk0bb"
] |
[
"So when you have an injury that physically alters your body, such a bruise or cut, your body has two responses one of which is a chemical signal that calls white blood cells and platelets to move to the area of interests. The white blood cells attempt to quell any possible foreign entities from your body that may cause an infection and the platelets begin clotting the cut. The scab both helps to keep the cut closed and prevent future infection. Afterwards the cells around the cut attempt to bind back again to themselves from underneath the scab. Interruptions and different factors can lead to an over expression in younger skin cells which cause scarring. I’m sorry this is a very, almost juvenile explanation, that may not answer your question"
] |
[
6
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
9ua7xf
|
How the hell are Koalas not extinct?
|
Biology
|
explainlikeimfive
|
[
"e92rzks",
"e92rylt",
"e92x4ty",
"e93c37a",
"e92wo50"
] |
[
"There aren’t a lot of predators that eat koalas, for one. There are a lot of them in zoos all over the world, so there’s a distributed genetic diversity that would allow them to be bred back stronger if the population did start to decline. What makes you think they should be endangered?"
] |
[
25
] |
[
[],
[],
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
9fzqqw
|
How does Supply and Demand work together in Economics?
|
Whenever we graph supply and demand in a graph, I just don't fucking get how it works. I can't understand this bullshit for the life of me. Please someone provide me with an easy-ass explanation.
|
Economics
|
explainlikeimfive
|
[
"e60ee5j",
"e60h39m"
] |
[
"Low demand high supply: You sell ice cream. You spent money to buy it and want to make more money. It's cold outside and no one wants to buy ice cream. You lower the price and say \"hey. Ice cream is cheaper now. Come get it.\" I buy ice cream from you and you make a small profit. Low supply, high demand: Now its summer. Everyone wants ice cream. You don't have much left. You say \"I have the only ice cream around. If you want it, you have to pay triple the normal price\" I buy ice cream because I'm desperate and you make lots of money High supply, high demand: your neighbor opens an ice cream shop. You lower your prices so people buy from you and not him Low supply, low demand: there is no ice cream shop. You live in Alaska. No one wants ice cream anyway."
] |
[
12
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
ewy923
|
Does Britian hold any authority over Canada?
|
Other
|
explainlikeimfive
|
[
"fg562ju"
] |
[
"The UK government has no role in Canadian politics, but the Queen does hold an essentially symbolic role."
] |
[
4
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
7gynzu
|
Since we now know that atoms are made of even smaller particles, and the basis for their existence is that at some point there is a limit to how small something can get, does that mean either that there is no limit to size, or that atoms aren't real or practical terms anymore?
|
Chemistry
|
explainlikeimfive
|
[
"dqmr1gp",
"dqnaiep"
] |
[
"Is there a limit as to how small something can get?"
] |
[
3
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
9vqpc5
|
How do websites remember your password if its only secret to you?
|
Technology
|
explainlikeimfive
|
[
"e9edy3x",
"e9ed6do"
] |
[
"They run it through a machine (algorithm) that scrambles text into an unrecognizable pattern. This machine is special. It can’t unscramble, it always scrambles things the same way, and it will never scramble different text into the same pattern. So, they run your password through the machine and hold onto the pattern. You log in, they scramble what you typed in, and if those scrambles match the scrambled pattern they held onto, then you’re in."
] |
[
9
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
6n1wpo
|
Traditionally we think of batteries as having a very short life span. How are the new Battery power plants like the one in Australia by Elon Musk going to last a profitable amount of time?
|
Chemistry
|
explainlikeimfive
|
[
"dk61v7z",
"dk620kz"
] |
[
"Traditionally, the batteries we use are designed to be extremely portable, which means small, oftentimes thin, and light. This results in additional cost per watt-hour due to the smaller size, specialized, non-optimized sizing, and issues of scale. Additionally, heat is usually a concern in consumer devices. A high-capacity phone battery might be 3 inches by 5 inches by a quarter inch, and have a capacity of 11.078 watt-hours. Tesla's Powerpack 2 has a capacity of 200 kWh, weighs 3575lbs, and is roughly 18 feet by 7 feet by 11 feet. Since size isn't a concern, they can focus on making the battery as cost-effective as possible."
] |
[
8
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
6cy6fh
|
Can anyone explain why we have foods that start out on the shelf but than have to be refrigerated so they won't go bad?
|
Foods like: Ranch Mayo Ketchup Etc..
|
Other
|
explainlikeimfive
|
[
"dhyae81",
"dhya40t"
] |
[
"Most foods with \"refrigerate after opening\" have been vacuum-sealed or canned in order to kill off harmful bacteria, or heated and the package filled with nitrogen (or inert gas) in the case of dry foods. As soon as the container or package is unsealed, it's exposed to oxygen and all the dirt, spores and bacteria contained in our atmosphere once more, and so the decay, fouling, molding and/or other such degeneration processes start back up immediately. At that point, you put it in the fridge or things like mayonnaise will do what they do best; go completely rancid overnight. Effectively, the packaging techniques allow us to temporarily pause the food's expiration, until we've opened it."
] |
[
13
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
lgiur1
|
Why is Neo Classical economics still globally prevalent in policy despite having been “debunked” years ago?
|
Economics
|
explainlikeimfive
|
[
"gmrokks",
"gmrp0gu"
] |
[
"Because it makes rich people richer, and government policy largely follows the whims of the wealthy capitalist class that funds policymakers."
] |
[
3
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
avtuqf
|
Why aren't old films that can't be remastered with the old reels not just remastered digitally with algorithms or upscaling software?
|
Technology
|
explainlikeimfive
|
[
"ehhm83y",
"ehi4a3a"
] |
[
"They can be, but the technology is pretty new and still requires a lot of manual tweaking, which adds to the cost. So far it usually hasn't been worth it economically."
] |
[
11
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
7jo8ac
|
How does a penis triple in size while erect?
|
Biology
|
explainlikeimfive
|
[
"dr7vuc1",
"dr7vn3y",
"dr7wpfs"
] |
[
"Imagine a balloon. At the start, the balloon is small. After u blow air into the balloon, it gets bigger and bigger. But instead, the balloon is ur penis and the air is ur blood."
] |
[
3
] |
[
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
bup8zr
|
Why is it that people hate waking up even after getting 7-9 hours of sleep?
|
Biology
|
explainlikeimfive
|
[
"epfb4y4",
"epg6tkg",
"epfagfj"
] |
[
"It depends on what phase you wake up in during your sleep cycle. If you finish your 90 minute sleep cycle and wake up around then, even if it’s only been 3 hours, you won’t feel as tired as of you wake up in the middle of your REM cycle, even if you have already slept 7+ hours. Also some people need more sleep than others or are on a different sleep cycle (variations of naps during the day and less time at night)"
] |
[
38
] |
[
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
l5zjag
|
What's preventing temperature across the globe to reach an equilibrium since air flows freely?
|
If I open the windows in my room, which has AC turned on and it's cool in the summer, it will quickly become as hot as it is outside, why isn't it happening around the globe?
|
Physics
|
explainlikeimfive
|
[
"gkxevjs",
"gkxc5ks",
"gkxfc89",
"gkxc5is",
"gkxl3iw",
"gkxicxp"
] |
[
"We perceive air as this uniform gas that's just everywhere, when in reality air actually clumps around itself and forms bubbles and pockets. These bubbles form when air of the same temperature and density clump together. You'll get bubbles of cold air, bubbles of hot air, bubbles of wet air, bubbles of dry air, etc. In fact, wind is when these bubbles push against each other. The bubbles are so huge and so sharply determined by their heat and density and humidity, that they don't just blend into each other: they actually form a wall, or a front, and push against each other. You may have heard the weather forecast talking about a warm front or a cold front coming in. That's a big bubble of one type of air pushing another. You get wind at the line where the bubbles meet, and one bubble is pushing the other. Some airline turbulence is also caused by these bubbles, since they don't just push around horizontally on the surface of the earth but they stack vertically on top of each other into the stratosphere, too. So sometimes when there's turbulence or the feeling of a sudden drop while flying, it might be because the plane is punching through one air bubble into the next."
] |
[
48
] |
[
[],
[],
[],
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
8x1cfd
|
How do we know dinosaurs were the dominant species of their times?
|
Dinosaurs are some of the largest creatures that we know of, but just because they were large doesn't mean they were the dominant species. For example, blue whales are not the dominant species today, humans are. So how do we know that dinosaurs were the dominant species that most people believe they are?
|
Biology
|
explainlikeimfive
|
[
"e2023vp"
] |
[
"What do you mean by \"dominant\"? Here, dominant means \"abundant, successful, ubiquitous.\" Dinosaurs defined their era, in the same way that trilobites defined their era. It does *not* mean that they were the *most* abundant category of life (that almost certainly goes to bacteria) or even the most abundant category of macroscopic life (which almost certainly goes to arthropods). Nor does it mean that they were always the largest life - there were very small dinosaurs, too. But the largest living things at the time were dinosaurs. The highest level of predators were dinosaurs. The largest herbivores were dinosaurs. They were found in every environment, at every niche possible for them to fill and still be classified as dinosaurs. You also have to remember that \"dinosaur\" is a **huge** classification that includes an incredibly diverse range of animals, not one species. You're comparing an entire huge group of animals to two individual species alive today. Instead, compare dinosaurs to *all* of the mammals that have ever lived, both modern species and extinct ones. It would not be appropriate to say whales *or* humans are the dominant animals now, but you might be able to argue that mammals are. 65ish millions years from today, if some intelligent species is looking at the fossil record for the last few million years, humans will be just a tiny *tiny* piece of that. If they're looking for how to define this era, they'll be looking for a kind of animal that is everywhere, fills many niches, lives in almost every biome on Earth. Mammals fits that pretty well, as dinosaurs did before."
] |
[
7
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
iln65p
|
why do you have to spay or neuter your pets? I know that it stops them from reproducing but why do we have to (or must) do it on our pets?
|
Biology
|
explainlikeimfive
|
[
"g3tetk5",
"g3t9ol0",
"g3t9o2d",
"g3temza"
] |
[
"About 6.5 million cats & dogs enter shelters every year. About 3.2 million are adopted & 710,000 are returned to owners. The rest are either euthanized (1.5million), die in the shelter, or stay there another year. Nobody's pets need to multiply."
] |
[
11
] |
[
[],
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
995nw9
|
why is it most top 40 radio stations only play ~5 songs on repeat?
|
Other
|
explainlikeimfive
|
[
"e4l3ga4"
] |
[
"The answer is that one company owns almost all those stations, and has broadcast licenses for a limited set of music. They used to be called Clear Channel and rebranded themselves as iHeart Media, Inc. a number of years back. They buy up all the independent stations and turn them into part of the borg."
] |
[
3
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
5ra0b9
|
why do doctors work 24 hour shifts instead of the normal 8 hour shift?
|
Culture
|
explainlikeimfive
|
[
"dd5k9qh"
] |
[
"It's very simple, it ensures that in most cases one doctor would be able to work with a patient from entrance to the hospital to stabile/release. Tests, diagnosis, and treatment could be hampered if say the doctor had to hand you off to a changing shift and pass on the information gathered up to that point. It's possible that someone could be forgotten all together or that a vital bit of information could get lost in the transfer of your case. It also is easier to establish trust in care."
] |
[
18
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
mlpyyw
|
How do people actually die from dementia/Alzheimer’s?
|
I know that dementia and Alzheimer’s cause a significant mental decline but what does it physically do to the body? Does the brain just stop telling the body how to function?
|
Biology
|
explainlikeimfive
|
[
"gtmy1e3",
"gtmuf10",
"gtmzgvi"
] |
[
"In the end, basically for either/both, yes, the brain forgets to function key organs and the person dies. You should be aware that Dementia and Alzheimer's are not the same thing. Dementia is the decline in mental ability. Alzheimer's is an actual disease, which can cause dementia. I had a father in law with dementia and my pops has been dealing with it for a few years and is closing in. Neither had/has Alzheimer's though. If someone you know is dealing with this I cannot recommend it enough for them and their friends and family to go to therapy or group or have some safe outlet to discuss what they are going through."
] |
[
9
] |
[
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
975jxz
|
What exactly does it mean to "go down the wrong pipe?"
|
Biology
|
explainlikeimfive
|
[
"e45oofu"
] |
[
"It literally goes down the wrong pipe. Food makes its way into your air pipe and your body convulses slightly to cough it up."
] |
[
9
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
ditklu
|
Can a particle in the absolute zero state freeze a particle in the plasma state? Will the plasma particle freeze or will the absolute zero particle melt?
|
I’ve been wondering this for quite some time, and I’d like to know the answer.
|
Physics
|
explainlikeimfive
|
[
"f3yafpo",
"f3yb1af"
] |
[
"First of we cannot achieve absolute zero. This is known as the 3rd law of thermodynamics. So your question is invalid. Also when we speak about individual particles temperature and heat stop really making sense. Thermodynamics is a classical theory and to describe individual “particles” we need a quantum theory."
] |
[
6
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
czlchq
|
What is rate setting and how does it effect the public?
|
Recently there have been tons of commercials in my area bashing rate setting and saying that it will cause a shortage of medical professionals, but I'm not sure I truly understand the concept.
|
Economics
|
explainlikeimfive
|
[
"eyz65c7"
] |
[
"Instead of allowing a doctor/hospital to charge whatever they want, specific rates are established for procedures. An MRI costs $XXX and an append removal costs $YYYY, vs. now where it might cost $2000 for an MRI at one hospital and $5000 at another, but one insurance company might pay $300 and another $1000. The lack of consistency and transparency are a big part of the reason why healthcare costs so much in the U.S. Of course the businesses profiting from that will be against it, and so they pay to run ads trying to sway public opinion in their favor."
] |
[
7
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
hn1oj7
|
How do the forces of gravity and magnetism differ?
|
Essentially, how do the two forces differ in the way they attract two objects together? I understand that gravity is a relationship between any two objects with mass, and gravity's "pull" is visualized as an object creating a depression in space; the more massive the object the deeper the depression. But how would you define magnetic force in terms of the relationship between two objects? Is there a comparable way to visualize magnetic force as in the gravity example?
|
Physics
|
explainlikeimfive
|
[
"fx8rhjy"
] |
[
"Every force has a sort of \"Charge\". For gravity, we call that charge \"Mass\". In electromagnetism, we call it \"Charge\". In the strong force, we call it \"Color Charge\". We don't really have an understanding of fundamentally what these charges are, we just know that they carry force, and react to other charges. The intensity of the charges is really what sets them apart. Electromagnetism is about 10^36 times as strong as gravity. It's why a simple magnet that fits in the palm of your hand can offset an entire planets worth of gravity. One single pound of pure electromagnetic charge has the same strength as the entire planets worth of gravity. The thing is, electromagnetism has two poles (positive and negative) which cancel each other out. Gravity has only one pole, and no cancellation happens. As it happens, the strong force with its color charge has three poles. It's why we call it \"color\" charge. Much like we arbitrarily chose \"positive\" and \"negative\" to be the two opposing poles of electromagnetism, we chose \"red\", \"green\", and \"blue\" to represent the poles of the strong force, as all three together cancel out, similar to how red, green, and blue all add to make pure white. The strong force is about 100 times as strong as electromagnetism, and is responsible for keeping atoms together."
] |
[
7
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
6axtqz
|
How does "Login via Facebook/Google/etc" work? How can it be secure to give away my credentials to random sites?
|
Technology
|
explainlikeimfive
|
[
"dhiabgs",
"dhi872g",
"dhicsf8"
] |
[
"Your credentials are never sent or known to the random site, but your user info is. This is how it goes: 1. You want to login to random site XYZ and that means you want to prove your identity to XYZ (this process is called authentication) 2. When you choose Login via Facebook/Google/etc you are choosing them to prove your identity for you (because they already know you, you are registered there). The way Facebook/Google manages to prove your identity to XYZ depends on the protocol implemented behind the scenes (OAuth, OpenID) 3. By choosing Facebook/Google to prove your identity, you are knocking on their doors and asking them to give you a letter stating who you are and possibly a few more details about you. Before giving you the letter, you must prove that you are who you claim to be, then, Facebook/Google asks you to prove your identity at their door -- > using your username and password. 4. If your username and password are correct, Facebook/Google will issue the letter for you with a security feature like a watermark, something that makes the letter unable to be forged. 5. Then, you go back to XYZ, knock on its door, show the letter. XYZ examines the letter and because of the security feature, XYZ can confirm that your letter is valid and they let you in. (how XYZ knows Facebook/Google's security features is another story)."
] |
[
205
] |
[
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
c3gx6y
|
Why are there strong and successful campaigns to ban fur clothing and not other animal products like leather?
|
Other
|
explainlikeimfive
|
[
"erqwa6a"
] |
[
"A lot of fur items like mink or sable are killed for their fur and the rest discarded. Cows and lambs are killed for their meat and the skin is also used to make leather. One case is wasteful and pointless, the other is resourceful. Also leather is really useful, fur is seen as elitist."
] |
[
14
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
n4wljd
|
How is an animal or human able to sense where on its body something is touching its skin? I know there are topographical 'maps'in their brains, but how does this translate to an individual knowing where on its body the touch is being applied?
|
Biology
|
explainlikeimfive
|
[
"gwxyjpy"
] |
[
"The individual touch-sensitive nerves all over your skin are connected to that \"map\" in your brain. Your brain knows \"when this nerve lights up, that's my left index finger\" (or whatever) because it's got a continuous nerve connection all the way out to that physical location. Areas with high nerve density (fingertips, lips, genitals, etc.) have very good resolution...you can feel very fine changes in position. The use correspondingly more brain space to process. Areas with low nerve density, like your back, have lousy resolution because one nerve is covering a much larger area"
] |
[
4
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
kismab
|
How do scallops have such beautiful, perfectly shaped shells? They're basically just small globs of meat, right?
|
Do they find the shells lying around and climb inside them? Do the shells form from sand around their glob bodies over the course of a hundred years?
|
Biology
|
explainlikeimfive
|
[
"ggsnwj8",
"ggsoud4"
] |
[
"Here's how mollusks grow their shells from Scientific American. \"The exoskeletons of snails and clams, or their shells in common parlance, differ from the endoskeletons of turtles in several ways. Seashells are the exoskeletons of mollusks such as snails, clams, oysters and many others. Such shells have three distinct layers and are composed mostly of calcium carbonate with only a small quantity of protein--no more than 2 percent. These shells, unlike typical animal structures, are not made up of cells. Mantle tissue that is located under and in contact with the shell secretes proteins and mineral extracellularly to form the shell. Think of laying down steel (protein) and pouring concrete (mineral) over it. Thus, seashells grow from the bottom up, or by adding material at the margins. Since their exoskeleton is not shed, molluscan shells must enlarge to accommodate body growth. This pattern of growth results in three distinct shell layers: an outer proteinaceous periosteum (uncalcified), a prismatic layer (calcified) and an inner pearly layer of nacre (calcified).\" The shape of the shell has to do with the fact that scallops are free swimming unlike their oyster relatives. They swim by clapping their shell together. If the shell was not symmetrical the scallop would swim in circles. Not good for getting anywhere. Also they are more than just muscle blobs. They can even have 200 eyes over their mantle. They are pretty complex."
] |
[
11
] |
[
[],
[
"https://en.wikipedia.org/wiki/Bivalvia",
"https://en.wikipedia.org/wiki/Gastropoda",
"https://www.fisheries.noaa.gov/species/atlantic-sea-scallop",
"https://en.wikipedia.org/wiki/Bivalve_shell",
"https://en.wikipedia.org/wiki/Mollusca"
]
] |
[
"url"
] |
[
"url"
] |
7s4w0s
|
Why is it greenscreen and not any other color? and how does it work?
|
Repost
|
explainlikeimfive
|
[
"dt1zvki",
"dt204it",
"dt219zz"
] |
[
"It can be any colour you want. But you have to pick a colour that will not clash with the rest of the set, or the costumes of the actors. There has to be a decent contrast between the screen and the rest of the set."
] |
[
6
] |
[
[],
[],
[
"https://cdn.list25.com/wp-content/uploads/2011/11/217.jpg",
"https://www.videomaker.com/sites/videomaker.com/files/styles/vm_image_token_lightbox/public/articles/17026/321-C10-Basic-Training-SECONDARY.png?itok=cRAqYrT2"
]
] |
[
"url"
] |
[
"url"
] |
|
7m22pn
|
Why does cross breeding work between certain species but not all?
|
Biology
|
explainlikeimfive
|
[
"drqr4zf",
"drqr3c8",
"drrs608"
] |
[
"Your genetic code is like a recipe, a series of biological steps that describe how to make you you. Your unique recipe is created by going through your parents' recipes, and at each step choosing at random from your father or your mother. If both of your parents are German chocolate cakes, their recipes are going to be very similar and most the steps are are going to be the same. Maybe one uses a darker chocolate or has more pecans, but isn't going to matter too much which parent you get which step from. If one of your parents was a red velvet cake instead, the recipes are different, but still pretty close. There is pretty good chance you'll still get some sort of cake out of the combination, but it is going to be a pretty unusual one no one has ever seen before. But if one of your parents was a banana cream pie, those recipes are too different. When you try to combine them, you are probably just going to make a mess, and not get any sort of edible dessert out of your efforts."
] |
[
104
] |
[
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
fgcvdx
|
Why do hot water droplets feel so cold after they bounce off a surface? (i.e in the shower when hot water from the spout bounces off the wall and sprays you)
|
Physics
|
explainlikeimfive
|
[
"fk3r4al",
"fk3pqt0"
] |
[
"Water gets heated from a fire. Water comes out of the showerhead and immediately loses a lot of heat because the tiny droplets adjust to the ambient temperature. If the tiny droplets hit the surface of something, it will cool even faster because water touching an object will cool much faster than just touching air."
] |
[
11
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
974bu7
|
I read that some sub marines are powered by nuclear power such as Uranium for years before having to be changed. Why cant our normal everyday electric also come from Uranium?
|
Technology
|
explainlikeimfive
|
[
"e45etgq",
"e45fij4",
"e45efi1",
"e45gbp1"
] |
[
"It can and it does. Nuclear submarines, nuclear aircraft carriers, and nuclear power plants all generate electricity in the same way Some countries generate a significant amount of their power from nuclear energy. France generates 40% of its electricity from its 58 nuclear reactors. Expanding capacity is hard. New nuclear reactors are very expensive due to all the regulations and safety features that are required. The local population doesn't understand them and is generally afraid of the radiation(which doesn't get out) and pushes back against the construction of new reactors and power plants. We're more focused on expanding solar and wind capacity these days as they have far far less political push back and are significantly quicker and more cost effective in the short term than nuclear power"
] |
[
6
] |
[
[],
[
"https://en.wikipedia.org/wiki/List_of_small_nuclear_reactor_designs",
"https://en.wikipedia.org/wiki/Radioisotope_thermoelectric_generator"
],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
6swsw5
|
How does the body prevent itself from becoming desensitized from its reward system, I believe it is Serotonin but not sure
|
Wouldn't you eventually become used to the feeling and it would gradually start to make you feel less happier to the point where it is the same as hearing a sorta funny joke but it isn't really funny, so you just kinda grin and do a sarcastic and forced "hah" but don't actually laugh at all or smile.
|
Biology
|
explainlikeimfive
|
[
"dlg84dg"
] |
[
"The short answer is that you do become desensitized, but only temporarily. Depending on which area of the brain and particular neurotransmitters you're dealing with, the sensitivity slowly returns over time (how fast/when depends on a *ton* of potential factors). You become temporarily desensitized to your own reward centers in order to maintain homeostasis and prevent repetitive/addictive behaviors (ideally, anyways). Receptors on neuron cell walls are activated by the presence of their corresponding neurotransmitters (serotonin, ect) and, as part of their activation, reduce the density of those receptors on the affected cell walls (diminishing your response more and more the longer and more intensely the receptors are activated). This helps preserve the body's ability to actually use these chemicals to send information. As far as *how* exactly it returns to normal is much more complicated to explain properly because different neurons will respond to different stimuli. As I understand it, in general, most neurons seem to have a preferred 'activation level' and will either reduce or increase the number of receptors on their cell walls over time to maintain that balance. There are various stimuli in the nervous system will affect this balance set-point, though. For example kappa-opioid receptor activation will temporarily increase the receptor density of a couple other types of opioid receptors elsewhere in the body. There are also neurotransmitters that temporarily block activation or directly modulate the receptor density. Basically, the brain's fundamental mechanisms are really complicated... Disclaimer: I am no neuroscientist and this is very complex stuff that I'm not even entirely sure science has a clear consensus on. Please correct me if you see anything wrong/misleading!"
] |
[
3
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
enmf3l
|
Why are white Americans not referred to as European-Americans?
|
Culture
|
explainlikeimfive
|
[
"fe1nx5l",
"fe1nvdt"
] |
[
"First, don't put a hyphen in Native Americans. For the most part, the {location}-American term is used by those who immigrate to the US after the independence of the nation (the primary exception being the descendants of enslaved persons). However, when it comes to Europe, we tend to use Irish-American, or Italian-American, etc. if at all."
] |
[
6
] |
[
[],
[
"https://youtu.be/Ig_OuhBtUfs?t=130"
]
] |
[
"url"
] |
[
"url"
] |
|
5lxukm
|
How do the military counts and confirms kills?
|
You often hear in documentaries for example "John Doe had x numbers of confirmed kills", how do they know?
|
Other
|
explainlikeimfive
|
[
"dbzcnpe"
] |
[
"There is no formal procedure, nor an official record. It's essentially self-reporting. Most snipers operate with a spotter. The sniper says \"I killed 'em.\" The spotter either confirms (\"He killed 'em\") or doesn't (\"Couldn't see\"). This goes into after-action reports, and that's about it. \"Confirmed kills\" is basically just PR. It's not an official number. [A good Quora answer on the subject.]( URL_0 )"
] |
[
6
] |
[
[
"https://www.quora.com/What-exactly-is-a-confirmed-kill-and-an-unconfirmed-kill-How-are-sniper-kills-confirmed"
]
] |
[
"url"
] |
[
"url"
] |
659pxf
|
Why do our toe nails choose to grow towards different directions instead of straight up like finger nails do?
|
Damn you ingrown toe nails. edit: Another question: How does the way we trim our toe nail affect its growing direction? Why isn't this experienced on finger nails?
|
Other
|
explainlikeimfive
|
[
"dg8lw43",
"dg8ki47"
] |
[
"It is because you don't wear shoes on your hands. Shoes, those with narrow toes, push on the toes and toe nails. When I started to wear wider size shoes (width EEE in my case) I stopped getting ingrown toenails. Make sure your shoes have room for your toes to move."
] |
[
4
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
6a48t5
|
Why is it quieter when it snows?
|
Physics
|
explainlikeimfive
|
[
"dhbldsp",
"dhcbzk7",
"dhbp107",
"dhbn2rw"
] |
[
"Sound travels in waves yeah? Well sound bounces off of structures to get to places. Off of the ground, buildings, etc. When it snows it adds a layer of snow, which usually isn't packed tightly, so it doesn't reflect a lot of that wave back as well. It's like hitting a baseball with a wooden bat verses a pool noodle."
] |
[
108
] |
[
[],
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
6gpe77
|
Why is the age of consent in some countries such as Japan and Mexico so low compared to countries like the US?
|
Culture
|
explainlikeimfive
|
[
"dise2p2",
"dis88cr"
] |
[
"I live in Mexico and I do think the age of consent should be higher (currently its 18). Most teens start having sexual experiences around the age of 15 (mostly on poor neighborhoods where there are gangs involved) thus, leading to low education and complicated family scenarios."
] |
[
3
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
5wwcbr
|
How does a police officer prove his radar reading was specifically for your car when there's hundreds of cars whizzing by on a busy highway?
|
Technology
|
explainlikeimfive
|
[
"dedbcwe",
"dedkpzc",
"dedkq5d"
] |
[
"They point it at your car. They can observe you are moving faster than the other traffic and they stop you under their own judgment. In court their judgment is generally considered to be reliable evidence that a particular motorist was behaving incorrectly."
] |
[
21
] |
[
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
aeeupe
|
how can someone under 25 die of heart disease while appearing healthy?
|
Biology
|
explainlikeimfive
|
[
"edovam0",
"edownz3",
"edovajx",
"edp0w0n",
"edp0wn5",
"edp137r",
"edp43o9"
] |
[
"A condition called Hypertrophic Cardiomyopathy (HCM). Basically, your heart works and pumps blood powered by electrical signals running through the muscles in its walls in **regular rhythms**. This depends on healthy size of the heart. In HCM, the walls of the heart - particularly between chambers called 'ventricles' - thicken. This obstructs filling of the heart and can later cause other bad changes such as increasing pressure in the heart. Many people with HCM live normally, but in rare cases, the thickening and damaging changes to the heart can result in sudden death because the heart is working too hard and the thickened muscle and changes disrupt the electrical signals. This causes a very dangerous rhythm called 'ventricular tachycardia' and loss of heart function. Anytime you hear of a young athlete (think college or high school) dying during a game, HCM is a common cause. As for what causes it, 50-60% of HCM patients have an inherited mutation in a heart structural protein, other causes include high blood pressure and simply unknown causes. Young people (40s or younger) who get heart attacks also might have inherited disorders that cause very high cholesterol levels. They usually wont appear healthy though and have symptoms like yellow spots on their skin from cholesterol depositing there."
] |
[
147
] |
[
[],
[
"https://peterattiamd.com/tomdayspring1/"
],
[],
[],
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
jijj2i
|
Why is depreciation considered an expense in accounting?
|
No matter how many times I google this, I can’t truly understand it. I simply don’t get why you would consider the lost value of an item over time to be an expense. If I buy a machine for $500,000, that’s clearly an expense. Because it cost me $500,000. But if nearly the entire value of the machine depreciates over time, and I sell it for $1 many years later, how would that mean there’s another $499,999 expense for depreciation. Isn’t that just part of the original $500,000 expense?
|
Economics
|
explainlikeimfive
|
[
"ga6tvtf",
"ga6twij",
"ga7f42x",
"ga7hvid"
] |
[
"When you buy a $500,000 piece of equipment, you trade the the money for the equivalent value of equipment. The company still has $500,000; it's just been converted from liquid cash to a physical asset. But when the value of that machine begins to depreciate, your company has lost \"money\". You no longer have $500,000 worth of assets. That lost money is an expense."
] |
[
174
] |
[
[],
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
evugsc
|
How can a ships anchor prevent a ship from drifting away, but can easily be redtracted at the same time?
|
Engineering
|
explainlikeimfive
|
[
"ffy2akz",
"ffyh9ny",
"ffy7sr4"
] |
[
"The anchor can be retracted when you are over it. When the anchor is holding the boat you should have 5-7 times the depth of rope or chain out to keep anchor embedded [ URL_0 ]( URL_0 )"
] |
[
10
] |
[
[
"https://youtu.be/Xc96Kgbv5w0"
],
[
"BoatUs.com",
"https://BoatUs.com"
],
[]
] |
[
"url"
] |
[
"url"
] |
|
8y6huy
|
what will happen with the student loan situation in the US when few people can afford to pay them?
|
Economics
|
explainlikeimfive
|
[
"e28oxj9",
"e28jmqx",
"e28w8ck",
"e28oma6"
] |
[
"It will be similar to when the housing bubble popped. Thousands, if not millions, of education's will be repossessed"
] |
[
18
] |
[
[],
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
9cugof
|
How does Netflix continue to produce more movies & shows and increase their profit without ad revenue?
|
Other
|
explainlikeimfive
|
[
"e5datg1",
"e5ddvcp"
] |
[
"You pay netflix every month to watch it. It costs about $10 / month. That money is used for expenses, including movies and shows. Netflix has a lot of subscribers. It gets almost 1 Billion dollars / month that way."
] |
[
12
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
7i688l
|
What exactly is a watershed and how does it work? For instance, we live in the Chesapeake Bay Watershed area. I have attempted to read on the subject, and consider myself a smart gal, but this just confuses me all day.
|
Thanks
|
Other
|
explainlikeimfive
|
[
"dqwcz16",
"dqwcj2q",
"dqwrr0s",
"dqwn6zn",
"dqwi9bd",
"dqwrbea",
"dqwzjlk",
"dqxbnpw"
] |
[
"Pick a spot on the ground. Imagine that a raindrop falls on that spot. Imagine that it doesn't soak in, but it runs downhill. Which way will it go? Trace its path. Eventually, it will flow into a stream. That stream will flow into a bigger stream, which will flow into a river, which may flow into a bigger river, and so on, which will eventually reach the sea. The last river will have a name; let's say it's the Mississippi. That means your original spot was part of the Mississippi watershed. Sometimes large watersheds are divided into smaller watersheds named after the various rivers that flow into it; for example, the Mississippi watershed may be divided into the Ohio watershed, the Missouri watershed, and so on."
] |
[
1219
] |
[
[],
[],
[],
[],
[],
[
"http://www.bbc.co.uk/schools/gcsebitesize/geography/water_rivers/background_rivers_rev2.shtml"
],
[
"https://www.stuffyoushouldknow.com/podcasts/watersheds.htm"
],
[
"http://www.ijc.org/en_/",
"http://www.mnwatershed.org/index.asp?Type=B_BASIC&SEC=%7BD2F10412-CF57-45F8-B6D0-6DF55C8A1608%7D"
]
] |
[
"url"
] |
[
"url"
] |
5vfwwj
|
Feudalism and governance
|
I am a bit confused about Feudalism. How it worked, was it a form of governance or something that happened alongside something like a monarchy. ELI5 Feudalism?
|
Culture
|
explainlikeimfive
|
[
"de1tua9"
] |
[
"Feudalism is both a governmental and an economic system. Say you've declared yourself King. You've got a lot of money, and a lot of dudes willing to crack heads, and a pretty good fort. From your fort you can effectively govern the area immediately around your fort. If anyone steps wrong, your dudes ride out and bust their head. You charge all the people living around your fort rent \"for their protection.\" It's a pretty good racket, but you're ambitious. You want more lands and more rent money, but you can't effectively control land far away. People Over There aren't scared of your dudes, because your dudes are far away. Sure you can ride to Over There once in a while and bust some heads, but you always have to go home eventually. It's frustrating. So you come up with a plan. You find a local dude from Over There who is a little ambitious himself. You tell him you'll send him some money and a few dudes, and put him in charge as Lord of Over There. If he plays ball and pays you a portion of the rent he collects you'll back him up with your dudes if he gets in trouble. If he gets uppity and stops paying his taxes, you'll ride over and burn down his nice new house. So now you're a King, you've got a Lord, and feudalism is happening! Do this in a few more places and you have a nice little kingdom going. Just be careful none of the Lords start getting ideas about how maybe they should be King..."
] |
[
6
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
70ll2b
|
How does a single microphone pick up sounds to send to a surround sound speaker system?
|
Technology
|
explainlikeimfive
|
[
"dn434m2"
] |
[
"That isn't how it usually works. There are usually a bunch of microphones that are recorded onto many tracks then mixed down for your surround sound system."
] |
[
15
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
94veki
|
Why can the sound volume of commercials on internet TV be double the actual show's volume?
|
Technology
|
explainlikeimfive
|
[
"e3o4ezj",
"e3o4p2q",
"e3o3vf5"
] |
[
"The commercials are allowed to be as loud as the shows. That means if the show has a gunshot, or an explosion, or a big dramatic music swell, then the commercial is allowed to be as loud as that. Thing is, the loudest sound in the show lasts for a few seconds at most, whereas the volume in the commercial is as high as that for the whole 30 seconds."
] |
[
22
] |
[
[],
[],
[
"https://en.wikipedia.org/wiki/Commercial_Advertisement_Loudness_Mitigation_Act",
"https://consumercomplaints.fcc.gov/hc/en-us/requests/new?ticket_form_id=33794"
]
] |
[
"url"
] |
[
"url"
] |
|
8f9g1o
|
How does Ink stick to paper?
|
Chemistry
|
explainlikeimfive
|
[
"dy1ugzt"
] |
[
"The ink doesn't stick per se. At a smaller scale, the paper is a bunch of wood fibers that are matted together in a sheet, almost like cloth! Here's an image of paper under a microscope: URL_0 & nbsp; When the ink touches the paper, the paper absorbs the ink into the gaps between the fibers, much like cloth absorbs water. After the ink dries, the water disappears, but the pigment remains trapped between the fibers."
] |
[
15
] |
[
[
"https://imgur.com/r/MicroPorn/UBlsXe8"
]
] |
[
"url"
] |
[
"url"
] |
|
cxnjhi
|
why is it that when your hands are covered all in snow , it gets to the point where they feel super hot all of a sudden when you are still out in the cold
|
Biology
|
explainlikeimfive
|
[
"eymbazb"
] |
[
"It's called the Hunting Reaction. When you're cold, your blood vessels all contract in order to help prevent the loss of body heat. After about 10 minutes, your blood vessels dilate, which is what causes the high temperature of your fingers. Basically, your body decided that it needs to warm those fingers up before you get frostbite, so it's going to pull some of that heat away from your core and into your extremities. This cycle repeats itself every 10-20 minutes or so."
] |
[
9
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
e7yc7m
|
How exactly does a seizure kill you?
|
Partially inspired by the news reports of Juice Wrld dying (who I never heard of before today), but also because I nearly died of a seizure two years ago, and didn’t think to ask a doctor.
|
Biology
|
explainlikeimfive
|
[
"fa7fs6o"
] |
[
"Seizures can block your airways and stop breathing. They can also rarely cause a cardiac arrest"
] |
[
7
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
ibtr1l
|
What is a "Gut Feeling" and why/how does it happen?
|
Other
|
explainlikeimfive
|
[
"g1y6jcx"
] |
[
"Intuition is your minds way of quickly presenting valid problem solving decisions by drawing on similar experiences. It’s a good way to avoid having to use logical reasoning and higher functioning for all your decisions. Basically, if you have this “feeling” that you should do something, it’s because you’ve had previous experiences which were somewhat similar in which that was the proper course of action, and you mind is drawing you to take the same course of action. Sometimes you have to suppress your intuition when the stakes are higher or there’s new information, because the similarities are not enough to rely one."
] |
[
12
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
exlraq
|
why are todays cctv images still kinda crappy?
|
Technology
|
explainlikeimfive
|
[
"fg95692",
"fg98fnj"
] |
[
"Because the goal isn’t to get a perfect image, the goal of cctv is to continuously surveil. It would take way too much space to properly store a consistent stream of super HD video, therefore the video quality stays crappy!"
] |
[
18
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
n9eodq
|
Why does some cheese melt smoothly but others get crunchy?
|
Chemistry
|
explainlikeimfive
|
[
"gxnhzey"
] |
[
"There are a lot of variables but the two biggest are that there are 2 ways that cheese is made. 1. Enzyme (rennet is used to make the curds) made cheese (i.e. mozzarella, swiss, etc), which will melt gooey. 2. Acid based (some type of acid is made to change the PH of the milk or whey and denatures the proteins which wrap around the fat molecules to make the curds) cheeses (i.e. feta, cottage cheese, ricotta, queso blanco, etc) which will soften with heat, but not melt. So the acid based cheeses will never get melty and gooey, but the rennet based ones will, though the additional variables which will contribute to how the rennet based cheeses will soften and pull are how much moisture content they have, fat %, how they are aged, and few other ones."
] |
[
6
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
8gcgwh
|
How do flying wing-type aircraft, such as the B-2 Spirit, fly without a horizontal stabiliser?
|
Engineering
|
explainlikeimfive
|
[
"dyalxij"
] |
[
"There's nothing in principle necessary about a horizontal stabilizer. It is useful because it reduces the amount of force necessary on the control surfaces to provide the same torque that makes the airplane pitch up and down. If you can provide the same amount of torque (e.g. through bigger elevons - combination elevators/ailerons) through wing devices, there's no problem. That said, you do lose the passive stability generated by a separate horizontal tail. The real tough part about losing a tail is losing *vertical* stabilizers - which is why you see a lot of delta-wing planes with no horizontal stabilizers, but not a lot of planes with no vertical stabilizer (example: the F-117A Nighthawk has elevons and no horizontal stabilizer, but two vertical tails). The vertical stablizer has tremendous value in preventing flat spins (the aircraft just spins like a top) which have historically been a major way people crash airplanes, especially maneuverable ones. The B-2 has split ailerons - one that can go up, the other goes down - to provide yaw control. They act as speed brakes, causing one side to slow down. Deploy the split ailerons on the left side, the plane will yaw left. As /u/lithuim mentioned, the control requirements for a total flying wing are pretty complicated. There are many planes that have been flown without automated computer control that don't have horizontal stabilizers. There are much fewer that have flown without vertical stabilizers, and they have all had control problems associated with the difficulty in performing yaw control manually without a vertical stabilizer. It's also worth mentioning that even early flying wings in the '50s and '60s had autopilots that helped maintain stability, though not to the same extent as later computer-controlled autopilots."
] |
[
6
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
8vg1fo
|
How are nude shots in film and television (specifically western, and more specifically cable and broadcast) accomplished?
|
I was always under the impression there was some sort of suit, but I think I may be wrong.
|
Other
|
explainlikeimfive
|
[
"e1n4hpw",
"e1n4jnu"
] |
[
"It can depend on the director and the actors in the scene. For example, some actors and actresses have a no nudity clause in their contracts. In that case, it's usually a body double for closeups. In some cases, it's the actor or actresses own body, fully exposed. In other cases it's entirely CGI, and in yet others it's combined with prosthetics or pubic hair wigs, cock socks (don't mean to be crude, I believe that's just what they're called), and so on. Cable and broadcast have specific limits of what can and can't be shown or what eating it would acquire, so camera angles and cutting scenes is usually important."
] |
[
10
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
7v2r4v
|
Why was England immune to the development of different languages within in, as it occurred in other European countries?
|
Culture
|
explainlikeimfive
|
[
"dtp1fd8"
] |
[
"There are actually many languages spoken in the UK to varying degrees of popularity, such as Scots, Welsh, Irish, Gaelic, etc,., and quite a few accents/dialects of the English language itself even within one city in the UK."
] |
[
6
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
iwdqau
|
How do animals learn to have sex?
|
Biology
|
explainlikeimfive
|
[
"g5z7qau",
"g5zph3z",
"g5zdayw"
] |
[
"Instinct. The happy chemicals in their brain say if you do that it’ll be good. But learn isn’t the right word rather than know"
] |
[
8
] |
[
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
aypgf3
|
Why are certain municipalities burning recyclables instead of actually processing them?
|
Other
|
explainlikeimfive
|
[
"ei2c20y",
"ei2gyfb"
] |
[
"Recycling is expensive. It requires cleaning and sorting the waste. On top of that, there's not always a lot of demand for it, since recycled materials are usually of lesser quality. So most of the time, recycled materials are mixed with fresh materials, and some products can't be made from recycled material at all. For example, clear plastic bottles can't be made from recycled plastic due to impurities. Likewise, most recycled paper and glass products have some fresh material mixed into it in order to get a reasonable quality. So no matter how well you recylce, there's always going to be excess. But even if they have to burn it, it is not wasted: Paper and plastic contains a lot of energy, so they can be used to generate electricity or help in incinerating regular garbage. The article talks about dioxines from the incineration plant: This is most likely because the plant in question is very old. Dioxins are created during incomplete combustion, if the temperature is not high enough and there isn't enough oxygen present. This can be avoided almost entirely by better designs."
] |
[
13
] |
[
[],
[
"populationmatters.org"
]
] |
[
"url"
] |
[
"url"
] |
|
cji447
|
How does sunscreen work?
|
Chemistry
|
explainlikeimfive
|
[
"evdnghv",
"evdnpwr"
] |
[
"The part of light that burns you is called UV, or ultraviolet light. You can't see it, but it's part of the light we get from the sun. Sunscreen reflects and scatters the UV rays or absorbs it instead of your skin absorbing it, depending on what the sunscreen is made of."
] |
[
6
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
82n2qt
|
Why is it when you eat hot/spicy food your chest gets "cleared up"?
|
Biology
|
explainlikeimfive
|
[
"dvbgstv"
] |
[
"A chemical travels up your nose and causes a bunch mucus to be produced and that causes your airway to irrigate."
] |
[
3
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
9tjnq8
|
Why exactly do you feel tired/fatigued when you are sick?
|
Usually it's answered with "it's because you are sick", but I'm curious what bio-chemical processes cause us to feel fatigued when we are infected by bacteria or viruses.
|
Biology
|
explainlikeimfive
|
[
"e8wrcl1"
] |
[
"Someone else may be a better answer, but I think the main reason is simply that your body is diverting a serious chunk of it's energy and resources to fighting the disease, leaving you running on empty for anything else. Since your body's energy is being depleted this way, you feel tired."
] |
[
10
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
5uufai
|
What is light actually?
|
What is light? How does it get from the their source and to our eyes, and how is it formed?
|
Physics
|
explainlikeimfive
|
[
"ddwyscb",
"ddx8iau"
] |
[
"There's something called an electromagnetic field that is everywhere. When you put energy into it, it ripples. These ripples are light."
] |
[
6
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
hkfk0e
|
What are all the Things A.I.s can do at the moment? What about the near future? And After?
|
Technology
|
explainlikeimfive
|
[
"fwseiuo",
"fwsfvo0"
] |
[
"No one can cover ALL of AI, but there are some fun tidbits. AI became the strongest chess engine by playing itself(both AlphaZero and LC0 pulled off the feat). The same AI will troll the opponent to simplify the game into a 100% winning position to avoid potential stalemates when the opponent only has the king. Even a medium human player would skip those 8 unnecessary moves and deliver checkmate. It's so loyal to the goal of winning as much as possible that it only 'cares' about efficiency when it matters. AI is able to find 'bugs' in games and exploit them. AI also fails to perform basic functions that humans understand very well, such as walling off a base in Starcarft 2. AI physics simulations are much more efficient than the traditional methods. Expect graphics to become much better while using less GPU. I expect AI to make weather prediction and traffic control obsolete professions. The most interesting part about AI, for me at least, is that it has the potential to become the best student we've ever seen, and the worst teacher ever imagined. It's nearly impossible to probe the weights and figure out WHY it does such and such. I'd recommend [ URL_0 ]( URL_0 ) for some great videos about AI."
] |
[
7
] |
[
[
"https://www.youtube.com/user/keeroyz"
],
[
"https://thispersondoesnotexist.com/"
]
] |
[
"url"
] |
[
"url"
] |
|
gbxbgb
|
Why are tesseracts represented as a cube inside another cube?
|
I know you can't actually represent a 4D object in tridimensional space, but I don't get why a cube inside another cube is supposedly a way of representing a tesseract. Can somebody explain it to me?
|
Mathematics
|
explainlikeimfive
|
[
"fp86n1o",
"fp8j8y7",
"fp86zok"
] |
[
"Just as a cube is two squares with their corners connected in the third dimension, a tesseract can be drawn as two cubes with their corners connected. Though this connection is in the fourth dimension, obviously we can't draw that, so..."
] |
[
9
] |
[
[],
[
"https://commons.m.wikimedia.org/wiki/File:From_Point_to_Tesseract_(Looped_Version).gif#mw-jump-to-license"
],
[]
] |
[
"url"
] |
[
"url"
] |
gip910
|
When people died, their bodies are burned with the coffin. So at the end, the ashes will be mixture of coffin and bones?
|
Other
|
explainlikeimfive
|
[
"fqfxzx5"
] |
[
"When a person is cremated, they’re not cremated in a coffin. A coffin kind of defeats the purpose of cremation."
] |
[
3
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
8db3cx
|
How exactly do health insurance companies contribute to the increase in cost of healthcare in the US?
|
Economics
|
explainlikeimfive
|
[
"dxlxumg",
"dxlq2nc"
] |
[
"A variety of ways. For example: * Martin Shkreli has been in the news a lot lately because he raised the price of a drug like over 5000%, from virtually nothing per pill to $750 per pill. It costs about $1 per pill to make. His is just one example of this, but the same thing has happened with a bunch of other pills, like the rabies vaccine, a gout drug, etc. There are several reasons for this, but one is that this pill is necessary to save the life of certain people. And they needed many doses, meaning the cost would be tens of thousands of dollars. Such people couldn't afford this price by themselves, meaning there would be no market for the drug at that price and they'd have to lower the price if they wanted to make any profit. But when an insurance company is paying, they'll pay for the drug for their customers despite the high price. But they'll make a deal to pay a fraction of the price, like 20%, for example. Still a lot but less than $750/pill. So in that way, the company can still make an enormous profit, while at the same time price gouging, taking advantage of desperate and suffering people who had limited options. If one guy does this with one drug, then it's not going to affect the whole market a lot. But it's become standard to raise prices tremendously, knowing that insurance companies must pay for the drug. It allows for price increases for prices across the board. * Insurance adds a lot of bureaucracy to medical costs, overall raising costs for the consumer. * Insurance companies can encourage a certain kind of unhealthy behavior that makes people sicker in the long run, raising ultimate costs in long term even though it's cheaper in short term. For example, with diabetes. There are various preventive measures that could be paid for by insurance to help reduce number of people who get diabetes. But it's not worth it to them because by the time a person gets diabetes, they could have a different insurance since people switch insurance a lot. * They can increase the cost to the consumer by increasing insurance premiums a lot because they're for-profit businesses that try to make as much money as possible. So they could in the past raise insurance price tremendously from year to year, often based on people's health. You get diagnosed with cancer? Your insurance rates are going up. And up, and up. Soon all of your disposable income is going to your insurance costs. * When there's a lot of profit to be made, businesses are going to figure out ways to take advantage to make more profit. They'll charge more, doctors will charge more, hospitals will charge more."
] |
[
7
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
5y54uc
|
why are there so few games developed for current generation consoles compared to in the days of PlayStation 2?
|
Back when I was a kid there were thousands of PlayStation games, now there are dozens/ hundreds for newer consoles like xb1/ xb360 respectively. Is it to do with the shift to mobile / PC gaming? Higher development costs? Licensing?
|
Technology
|
explainlikeimfive
|
[
"dena52k",
"den9miz",
"denb8u0"
] |
[
"A large number of factors * It costs a whole lot more to develop a \"major\" game on the PS4 than the PS2 If you want to make a PS2-level game with those sorts of graphics and features it won't cost all that much, but the smaller developers who would make use of that usually go even lower and make things imitating NES games because it's much cheaper. * Shovelware developers, the sort that make crappy licensed games, have all moved on to the app store Why buy your kid a handheld when you can hand it the family tablet to shut it up? The PS2 and Wii attracted these developers like flies to crap, and while it inflated the library count nobody actually enjoyed those games so it's a non-issue. * Issues with the Japanese market Consoles aren't selling like they used to in the Land of the Rising Sun. The people who would make quirky games like *Katamari Damacy* or *Stretch Panic* have turned to the ever-growing mobile market. The Japanese are infamously busy and don't have time to sit around at home. Handhelds such as the 3DS and Vita are still going strong over there. * Unable to grow Microsoft has officially introduced the Xbox One in China, but even with its growing middle class Chinese gamers aren't used to buying games and pass over it instead hopping over to the local internet café with its many freemium games. Developing markets would rather play [suspiciously familiar games]( URL_0 ) on their shiny new smartphones or pirate PC games. In short, there's nowhere for consoles to go. * The indie flood If you log onto Steam you will find there are more games for less money than you could've ever dreamed of as a kid, but how many of them could even a kid get fun out of? There is a tidal wave of new games made by people who have no purpose being in the industry. While there are diamonds in the rough you better be prepared to dig and dig and *dig* and **dig** and ***dig*** and ***DIG*** to find something."
] |
[
24
] |
[
[
"https://www.youtube.com/watch?v=L6JRtK5R93E"
],
[],
[]
] |
[
"url"
] |
[
"url"
] |
a41brr
|
What makes a force Fundamental?
|
I've been reading up on the four fundamental forces, and one thing that stuck out to me is that three of them (Gravity, EM and Strong) affect everything. The strong force holds atoms together, the EM force is the reason anything is able to interact with anything else, and gravity affects everything with mass, and everything has mass. However, I've noticed that the Weak force is very specific in that it only deals with radioactive decay, but very few things emit any form of radiation. So why is the Weak force fundamental? Is there something I'm missing about what the Weak force does?
|
Physics
|
explainlikeimfive
|
[
"ebapx4n",
"ebapzy6"
] |
[
"Fundamental means that it's not made of our a product of something else. i.e. any force that anything experiences is one of those four."
] |
[
5
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
hevznm
|
How have we donated billions of dollars to Africa, but we don’t see a change? What is happening with the money?
|
Economics
|
explainlikeimfive
|
[
"fvtuwel",
"fvtu54o",
"fvtv6yn"
] |
[
"Much of it went into the coffers of some local ruler an their people who quickly invested it somewhere else outside their own country. This is not an accident, but by design. Much of what is termed foreign aid is little more than attempts by rich countries like the US to bribe local rulers into going along with their foreign policy ideas. It is buying soft power to help companies and people in rich nations to easier exploit poor ones not charity. There are other types of charity not intended to further the interests of the rich and they have been more effective and save large numbers from starvation and helped build things up a bit, however compared to the wealth that is extracted by the rich from Africa, the actual aid is minuscule. Much more wealth is stolen than is given in aid. Some of the aid even backfires in some ways and makes things worse. Despite all that, actual absolute poverty in Africa and around the globe has been decreasing drastically over the years. the average African today is much richer than the average African decades ago was. They are just still very poor, because they started out poor."
] |
[
30
] |
[
[],
[],
[
"https://static.scientificamerican.com/blogs/assets/observations/File/Africa.jpg"
]
] |
[
"url"
] |
[
"url"
] |
|
6xe91l
|
How police finds criminals with no or nearly no details about them?
|
Like when someone get mugged and can only remember that the mugger was from a specific color, or a murder with no witnesses?
|
Other
|
explainlikeimfive
|
[
"dmf73o6",
"dmfgxl1"
] |
[
"Many of those cases remain unresolved and the criminal goes free. But later on they may leave some trace behind them in another crime, and when the police get them for that, they can connect them to the first crime too (because they may still have what they stole on them/at home, or traces in the mobile phone, or even the corpse dug down in the backyard!)."
] |
[
6
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
5mq0ag
|
Why does a weak am/fm radio signal result in a consistent static/fuzzy sound while a weak satellite radio signal results in intermittent high quality sound?
|
Physics
|
explainlikeimfive
|
[
"dc5gzw6",
"dc5h3ev"
] |
[
"The simple answer is that AM/FM is an analog signal, which you can \"kind of\" pick up. Think of analog as a scale of 100-0 with the quality increasing or decreasing as you move from the transmitter. Satellite radio is a digital signal. Think 1 or 0. It's either there, or it's not. The same holds true for satellite TV, where in a severe storm your picture will be perfect right up until it cuts out into nothingness."
] |
[
21
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
b0vxnu
|
Why is panic and fear experiend during sleep paralysis?
|
And why do our brain revert to something or someone holding us down during the experience? Is it always associated with death and/or the feeling that you're about to die?
|
Biology
|
explainlikeimfive
|
[
"eihli35",
"eihm4xi"
] |
[
"Because instinctively if we can't move we can't escape danger"
] |
[
5
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
igp34j
|
How come there is a push to not label autism and ADHD as mental illnesses?
|
Other
|
explainlikeimfive
|
[
"g2v31ti"
] |
[
"Some believe that the \"disabled\" label, similar to calling these \"illnesses\" can be harmful to those affected and encourage masking type behaviors (pretending to be neuorotypical). These masking behaviors can be damaging to those same individuals."
] |
[
3
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
5ww3b2
|
Why are some meats not identified by the animal they come from (deer = venison, cow = beef), but some are (dove = dove, alligator = alligator)?
|
Culture
|
explainlikeimfive
|
[
"ded8ulk"
] |
[
"For much of the middle ages, the aristocrats in England spoke French rather than English, but the peasants spoke English. Since the peasants were largely responsible for dealing with the livestock, the English words for the animals ended up in modern-day English. The aristocrats were largely concerned with the meat of the animals (peasants didn't generally get to eat things like beef and pork), so modern-day English ended up with the French words for those meats. For animals that don't have a split, they largely weren't eaten by those French-speaking aristocrats, so they didn't get a French-derived word for their meat in English."
] |
[
7
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
9xa29x
|
Corporate secrecy
|
Other
|
explainlikeimfive
|
[
"e9qn3rg",
"e9qm5in"
] |
[
"If a company like Blizzard announced that they were working on a new game and then they decided to drop it in favour of a more promising project it would attract negativity amongst people who were anticipating it. Many company's projects get sidelined for various reasons. They decide the cost is too high for the anticipated returns, the lead team go elsewhere, technical difficulties, creative disagreements, etc, etc."
] |
[
7
] |
[
[],
[
"https://www.huffingtonpost.com/entry/a-bugs-life-antz-rivalry_us_5b7eb6c3e4b0348585fe2ecd"
]
] |
[
"url"
] |
[
"url"
] |
|
7cdw4j
|
What is RAM and how much should I be using on a phone?
|
Technology
|
explainlikeimfive
|
[
"dpp64wj",
"dpp6c8e"
] |
[
"**R**andom **A**ccess **M**emory. It's where you phone puts all the data it's currently working on. All the code to run the apps that are open is also in RAM. If you're watching a video, or listening to music, it's in RAM. As long as you aren't using more than 90% of your RAM, you should be fine."
] |
[
7
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
65dpc1
|
Before GPS, how did pilots navigate planes?
|
Technology
|
explainlikeimfive
|
[
"dg9hpcw",
"dg9gm99"
] |
[
"Lots of good answers here so far, although none of them are totally complete. I'll try to fill in the gaps: - The most basic way of navigating is **ded reckoning**. This involves measuring the direction you want to go on a map, as well as the distance. You calculate the amount of wind correction required. Then you point your aircraft in the right direction and start a stopwatch. At some point(s) along the way, you can visually check whether your headings and timings are working, and if not (for example if the wind isn't exactly as forecast), then you make corrections. All pilots are taught this as the basis of all other navigation during their basic training. - The next most basic system is the **NDB**. This is just a radio beacon on the ground that transmits in all directions. The receiver in the aircraft can detect which direction the NDB signal is coming from, and point towards it. When combined with a compass, the pilot can ensure he flies along a line that goes to/from the NDB on a predetermined path. It's quite difficult to use, and subject to lots of errors, for example it doesn't work very well near mountains, at night, or near thunderstorms. - After that comes the **VOR**. Unlike the NDB, it transmits a slightly different signal in every direction. The receiver in the aircraft can detect where it is in relation to the VOR by interpreting the signal it receives. It's much easier to use than an NDB, and much less prone to errors, but essentially it's used to do the same job. - NDB and VOR are usually used together with **DME**. DME is also a radio beacon on the ground. The receiver can work out the distance the aircraft is from the beacon. They are often located in the same place as an NDB or VOR. So when you combine them together, you can work out what direction you are from the beacon, *and* how far you are, which enables you to fix your position. - Air traffic control have **radar** which enables them to see your position more easily (and often more accurately) than any of these navigation aids, but obviously that only works when the controller has the workload to use it - Even air traffic controllers who don't have a radar screen often have **direction finding** equipment, which enables them to tell what direction from the airport the aircraft is. And a few air traffic controllers can use more than one piece of direction finding equipment together to \"triangulate\" the position of the aircraft. These work by simply pointing at where the pilot's radio signal is coming from. There are a few other systems that are only used very rarely, too, but this covers most of the systems that are in use today."
] |
[
13
] |
[
[],
[
"http://www.citylab.com/work/2015/02/why-is-america-dotted-with-giant-concrete-arrows/385472/"
]
] |
[
"url"
] |
[
"url"
] |
|
ieh4nf
|
Why do we become agitated/violent when we're pissed off?
|
Biology
|
explainlikeimfive
|
[
"g2gcvtf"
] |
[
"When something stresses you your body releases adrenaline. Adrenaline increases aggression."
] |
[
7
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
a0o2c6
|
I've always read on here that the US helped destabilize a few governments in South and Central America. How was this done and how would it benefit the US in any way?
|
Economics
|
explainlikeimfive
|
[
"eaj5zld",
"eaj5db4",
"eaj5mjb",
"eajlvad"
] |
[
"The CIA has a long history of supporting military coups and providing support to dictators that are anti-communist. It was all part of the Cold War doctrine to prevent communist expansion, even if that meant propping up anti-democractic dictators. Having pro-US dictators in South America allowed the US to get trade benefits and natural resources from those nations like Oil, and Copper. But of course this backfired on a variety of occasions. The Shah in Iran was deposed by pro-Muslim forces creating the Iran of today. Saddam Hussein was originally backed by the US and we all know how that ended up. The Mujahedin were given US military aid to fight the USSR and after the USSR pulled out the Taliban took over. South Vietnam was ruled by a ruthless pro-west dictator that marginalized the Buddhist majority of his country. The list goes on..."
] |
[
11
] |
[
[],
[],
[],
[
"http://www.redicces.org.sv/jspui/bitstream/10972/2514/1/revistas_de_humanidades_y_ciencias%20sociales_No%205%20julio-diciembre%202013.114-151.pdf",
"https://en.wikipedia.org/wiki/Multi-National_Force_%E2%80%93_Iraq#List_of_countries_in_the_coalition"
]
] |
[
"url"
] |
[
"url"
] |
|
agknvs
|
When falling from most heights, why is it common to perform a roll upon landing?
|
Physics
|
explainlikeimfive
|
[
"ee6vfmu",
"ee6u2on"
] |
[
"It is a way to disperse the energy of landing. & #x200B; If you jump off a 10 foot high wall and land on your feet keeping your knees locked it will hurt because all the energy of your weight hitting the ground is slammed into your body at once. & #x200B; If you bend your knees as you land and take the strain in your legs then you slow down and stop rather than suddenly stopping. This hurts less. & #x200B; If you land on your toes leaning forwards and propel yourself into a forwards roll then you stop even more gradually. The energy of the weight of your body hitting the ground is taken over a few seconds as you roll instead of one sharp impact. & #x200B; This happens because you transferred some of your momentum from straight down to \"down and forwards\"."
] |
[
9
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
5oessc
|
Do companies round calorie content up or down on the food label?
|
For example, the nutrition label of a chocolate chip Clif Bar says that it contains 250 calories, with a macronutrient lineup of 5F/45C/10P. I know that fats contain 9 calories per gram, carbohydrates contain 4 calories per gram, and proteins contain 4 calories per gram as well. Now, when you add up the calories from the macronutrients of the Clif Bar, the calories actually come out to 265. This isn't a big jump in calories, but if all food companies are able to round down like this, 15 calories can add up pretty quick if a lot of foods you're eating on any given day have also been rounded down. So, my question is, is this allowed, or am I missing something here?
|
Chemistry
|
explainlikeimfive
|
[
"dcirrth"
] |
[
"Calorie rounding is allowed with these rules: servings with less than 5 can say 0. servings with less than 50 calories can round to the nearest 5 calorie increment servings over 50 calories can round to the nearest 10 calorie increment. So that 250 could have as much as 255 calories in it for a US food label. You may want to check that the carb number you provided didn't include fiber. You don't have to report the calories from fiber as we can't digest it."
] |
[
9
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
8c8anw
|
How can you bomb chemical facilities, like the US/UK/France have done, without all the chemicals released affecting the area?
|
Chemistry
|
explainlikeimfive
|
[
"dxcvbgg",
"dxcwhmn"
] |
[
"With few exceptions, chemical nerve agents are very volatile, and break down quickly. For this reason, and because they are *extremely* hazardous, nerve agents are stored as benign precusor agents. These are mixed together just prior to use to create the nerve agent itself. When chemical weapons facilities are destroyed, only the precusor chemicals are released. While some incidental mixing may occur if agent precursors are stored together, it generally creates negligible volumes of active agent. Other chemical agents, such as blister, blood, and lung agents, are stored in their active state, and can be released during an attack. But because military infrastructure is usually remote, and because chemical agents affect a small geographic area, the effects of such an event would be limited."
] |
[
745
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
frakho
|
why the storms of Jupiter separate gases into striking vortices and bands of heterogenous color, rather than mixing them into a continuous gradient?
|
Chemistry
|
explainlikeimfive
|
[
"fluu125"
] |
[
"First, there is the phenomenon of Hadley cells. These come about because the planet is round, spinning, and has one side facing the sun. These are pretty stable systems where the wind predominantly flows in a given direction. On Earth, these are responsible for Trade winds (winds strongly blowing west when a little north of the equator, then switch to blowing strongly east above \\~30° latitude). On Jupiter, there are a lot more of these cells, each cell is one of the colored bands. The vorticies that you see are the interactions of these two circulation cells. The colors of the clouds come from two chemicals, Ammonia clouds (white) and ammonium hydrosulfide (brown) On Jupiter, like on Earth, the atmosphere cools at higher altitudes. In the regions of the atmosphere where the air is rising, it reaches an elevation where it is cool enough that the ammonia condenses into clouds. These clouds are heavier than the air around them, but they are held up (and replinished) by the updrafts. In the regions where the air is falling, there is no ammonia to form clouds, and any ammonia clouds that are formed get pushed down to where it is warmer, so they evaporate. As a result, you can see the atmosphere below the ammonia cloud layer, which has a brownish color. As a side note, Jupiter is big. Those tiny vorticies that you see would be continent-spanning hurricanes if they were on Earth."
] |
[
16
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
j67rez
|
Aurora Borealis
|
Earth Science
|
explainlikeimfive
|
[
"g7wnd7m",
"g7wnxkr"
] |
[
"Sun throws away a lot of matter. Some of it are charged particles that get pulled towards the poles when they approach the Earth. When they enter the atmosphere, they energize it, akin to the current in fluorescent light bulbs, and thus make it glow."
] |
[
3
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
6df9l0
|
Why is that the Phillippines is spelled with a "Ph" but when when you refer to someone from there they are known as "Filipino". Why does the "Ph" change to an F?
|
Culture
|
explainlikeimfive
|
[
"di281u8",
"di2angf"
] |
[
"A: The word “Filipino” is spelled with an “f” because it's derived from the Spanish name for the Philippine Islands: las Islas Filipinas. Originally, after Magellan's expedition in 1521, the Spanish called the islands San Lázaro, according to the Oxford English Dictionary.Apr 22, 2010"
] |
[
15
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
gebvsb
|
Why do we use x, y and z as the standard variables in mathematics?
|
Mathematics
|
explainlikeimfive
|
[
"fpmiqb5"
] |
[
"A lot of math symbolism, like this one, was popularized by the French philosopher and mathematician, René Descartes (Fun fact: the term \"Cartesian\" is named after him). He wanted to make the convention of using letters like x,y and z to represent unknown variables, while a b and c are known constants. Why he chose those letters specifically is not really clear, but they're a convention that we still use today."
] |
[
12
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
6ube1x
|
Identity Politics and their role in American government
|
It's a term I've not heard before, and it's a term that's been coming up more and more in discussions.
|
Other
|
explainlikeimfive
|
[
"dlrdqwp",
"dlrq1tz"
] |
[
"I happen to be gay. I support politicians who believe I deserve equal rights in society, I will not support politicians who believe I'm not deserving of equal rights in society. In this case, I am practicing identity politics (specifically LGBT identity politics). The identity could be any group that has core goals which apply to you as a person."
] |
[
3
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
a892ou
|
Why is belly button lint always dark in color even when wearing lightly colored shirts?
|
Other
|
explainlikeimfive
|
[
"ec8t9di",
"ec8x8h2"
] |
[
"Fluff also crawl up from your boxers too. I tend to wear dark coloured boxers for.... Errrr for practical purposes."
] |
[
5
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
|
fmech3
|
How can a company like Tesla or Razer, switch from producing their standard products to producing medical equipment so easily? What is the process they have to follow?
|
Engineering
|
explainlikeimfive
|
[
"fl3q06j"
] |
[
"Depending on the old and new items, the hardest part is figuring out how to do it. For example, Tesla has to use sewing equipment to make seat coverings, can that be modified to make masks? Razer works with a lot of plastics and electronics, can they make respirator masks? Once you determine how you can help, and modify the equipment to do it, it's just an assembly line, like they'd use to make any other product."
] |
[
7
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
97hv9w
|
Do our eyes have a refresh rate?
|
Other
|
explainlikeimfive
|
[
"e48bplu"
] |
[
"I game at 240Hz. I can tell the difference between 240 and 220, but that doesn’t mean that when I’m watching a regular movie at the cinema (30Hz) all I see is a slide show. Your brain tends to fill in the gaps."
] |
[
3
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
f7zdk3
|
Why do our voices crack when we sweep a note from low to high?
|
Biology
|
explainlikeimfive
|
[
"fihf4tu"
] |
[
"It's called a passagio, and it's important if you sing to know on what notes it occurs. Singing low notes cause resonance in the chest. Higher notes resonate in the head. I'll avoid the obligatory jokes about voices resonating in the natural empty spaces in a singer's skull."
] |
[
3
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
afl4ee
|
Why some medicines have to be taken with food but it isnt necessary for others.
|
Biology
|
explainlikeimfive
|
[
"edzgp7b"
] |
[
"I'm sure others will pitch in with better explanations but in any case I'll give you some examples. Medicines that help with swelling (anti inflanmatories) cause excess acid in the stomach hence the requirement to eat before hand especially for those that have acid or ulcer issues. Another example is when some antibiotics are irritant to the stomach (since it also works against the \"good bacteria\" in the stomach that aids digestion) so it's sometimes preferable to eat (especially yoghurt) to minimise discomfort."
] |
[
3
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
l6wvjf
|
how exactly does copyright work?
|
If I have an idea for a concept but the name of the concept I came up with already exists, can I be sued for using the same name? If so, can their copyright expire like book copyrights?
|
Other
|
explainlikeimfive
|
[
"gl36uxv",
"gl39wos",
"gl4xej3"
] |
[
"A trademark can expire if it’s not used. But the original owner can assert their rights through a lawsuit and you might not want to get embroiled in it. If your trademark is not used for the same type of product, in the same market, and clearly does not imply connection with the existing one you might have a better chance of asserting the right to use it. But if you say suddenly start selling cars named Tesla in the US....you will be sued for damages before you hit enter..."
] |
[
5
] |
[
[],
[],
[]
] |
[
"url"
] |
[
"url"
] |
icqdxq
|
Apple hit 2 trillion in value. Does that mean if they “sold” the company, that would be the price or is it a stock thing?
|
Economics
|
explainlikeimfive
|
[
"g2468me"
] |
[
"Ownership of the company is divided into shares, each of which can be bought or sold. If you multiply the current price to buy one share by the number of shares that exist, you get $2 trillion. This doesn't exactly mean you could buy the company for $2 trillion though, since the price of a share is determined by supply and demand and only a relatively small number of shares trade on any given day. If you wanted to buy *all* of the shares, that would mean there was a sudden huge increase in demand, so then it would be worth even more."
] |
[
6
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
ayadeq
|
Can running on the spot achieve the same result as actually running a distance ?
|
Biology
|
explainlikeimfive
|
[
"ehzf36e"
] |
[
"Depends on your desired result. If you want to get anywhere, then no. If you only want to work up a sweat, then sure. But your muscles won’t get the same exercise. That’s the idea of treadmills: running in place with the benefits of actual running."
] |
[
10
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
fbptou
|
Why is it that memorization gets harder when you get older?
|
Biology
|
explainlikeimfive
|
[
"fj5uofw"
] |
[
"There are a lot of theories around this, but the best is probably about working memory, in my opinion. When you are young, working memory, the part of your brain, processing, storing and integrating new information with old information is really good. You don't know that much, you are learning, so novel information may be useful. The brain keeps and collects more of it, because it's not sure what information might be useful in the distant future. When you are older, you have more fixed knowledge. Your brain has experienced a LOT of routine where it's learned what info it needs and what info it doesn't so the integration and short term storing of new information for potential use later isn't prioritized. Brain is pretty sure it already knows the information it's going to need. You can definitely \"train your brain\" to get good at memorizing and teach it that \"memorizing information\", especially in the short term, is useful. Keep in mind this is a psychological explanation not a physiological explanation there are definitely other things potentially."
] |
[
3
] |
[
[]
] |
[
"url"
] |
[
"url"
] |
|
5u0fr1
|
Duration of "morning wood"
|
Let me see if I can word this correctly; I often wake up with morning wood. Seems like most every morning. I'm curious though, when my "morning wood" starts. I wake up, and have it, was it there an hour earlier? Two hours? Is there something regarding the "morning wood" that actually wakes us up?
|
Biology
|
explainlikeimfive
|
[
"ddqn9ly",
"ddqct81"
] |
[
"Your body releases testosterone early in the morning before you wake up, you get an erection as a side effect."
] |
[
3
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
81hpwl
|
Why are jobs in academia so hard to find?
|
How did we get to a point where we have more people with PhD's than jobs available (especially tenure-tracked)?
|
Other
|
explainlikeimfive
|
[
"dv37j9z",
"dv37hja"
] |
[
"Because pretty much every professor produces a lot more than one PhD over their career. If a professor graduates a PhD student every year, which isn't abnormal in the sciences (though it sometimes is in other disciplines), they'll produce 30+ graduates over the course of their career. That's way more than the one academic job that produced them, so the population of PhDs is going to far outpace the number of academic jobs."
] |
[
7
] |
[
[],
[]
] |
[
"url"
] |
[
"url"
] |
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