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How did we know about the existence of non-visible light if we can't see it? | That's an interesting question with a fun historical answer. Infrared light was first discovered by Sir William Herschel in 1800. He was experimenting with a prism and a set of thermometers, trying to see if different colors of light carried different amounts of energy. He discovered a band of invisible light that we n... |
How do certain hairs on our body know not to exceed a certain length? | If I understood this correctly all hair has a limit to its growth, your head hair's limit is just much much higher than your body hair.How do trees know to not keep growing into the sky forever? |
How can airport security scanners detect certain things, rather than just metal? How can it determine the difference between a gun and a watch if they're both made of metal? | One kind of airport security scanner is the millimetre wave scanners. These use millimetre wavelength light to scan someone. Rather than looking for metal, they look for solid objects about someones person. If its on the wrist, it's likely a watch. If it's tucked in the waistband, they're going to want to know what it ... |
why is kool aid powder sour before sugar is added to it as opposed to other drink powders that already have sugar added to them (crystal light, country time lemonade, tang, etc) | Sugar is cheap and a staple of the kitchen. Kool-Aid hits its price point because it's just the flavors of the drink & you can add your own sugar. Not entirely sure why lemonaid is different but you can buy Kool-Aid with sugar already added that way if you want.Back in the day, you could get Kool Aid with or without su... |
How do we know, that there is no solid ground on Saturn? | First we can know the mass of Saturn by observing it's orbit. Basically, the mass of the Sun, the mass of Saturn, the distance between those two and the speed or the orbit are all in relation. So by knowing the mass of Earth we can calculate the mass of the Sun, with telescope and trigonometry we can measure the distan... |
How come when lightning strikes the water (a lake for example) it doesn’t electrocute all the fish? | Is like plane. When lightning hit plane, plane no care because plane let's lightning go through. Lightning politely goes around the plane then continues downwards. That's because plane is made of metal. Water is also polite with electricity, just like metal. So water body, like lake or ocean is like big plane for fish.... |
Why did the look of movies get "clearer" in the 1990s? | I think you're just comparing different grade of filmstock. Look at 2001 for example, it came out in 1968 and it looks fantastic. |
How does Costco's brand 'Kirkland Signature' manage to make everything from food to clothing? | It doesn't. Kirkland is a brand. The products are produced on contract by various vendors and stamped with Kirkland label. This happens in alot of industries. The same factory will produce the same item with different branding labels. |
how come animals can walk relatively quick after being born, but it takes a human baby around a year? | Due to the need to walk upright, women's bodies are limited in the size of children they can bear. This means that human babies aren't fully developed when they're born.Humans are designed for our mind to develop and learn very rapidly from birth, and physically slowly. Animals are designed the opposite way. Our senses... |
What makes us attracted to certain genres of music? How can a group of people all have different taste in music? | For me, music is emotional. So depending on how I feel depends on what I want to listen to. I'm more attracted to R & B when I'm feeling romantic, Hard Rock when I'm feeling young, and Metal when I'm angry. And I listen to Metal more than anything .ha. |
Are electric eels actually electric? How can an eel generate electricity and why isn't it a hazard to itself? | Electric eels have large organs running most of the length of their bodies, coposed of specialized muscle cells called electroplaques. These cells generates electrical impulses in the same way nerve cells do, but the electric organs are structured in such a way that the voltage is amplified throughout the entire organ.... |
Why are we on the brink of war with Iran? | A Saudi oil tanker was attacked. There isn't much evidence that it was an attack by Iran. But that is the reason the carrier group was moved into the area. |
Why/How do cameras see Infrared? | Most cameras filter out IR light to help improve image quality. Cheap cameras, and especially old cheap cameras did not do this. So when a camera sees infrared light, its 'color value' is above the maximum value that we can perceive, so it just caps it at the brightest color that can be shown, which is white. Thus, whe... |
Why did Japan allied with Nazi Germany during WWII? | Essentially Japan saw it as a way to gain more territory, and they were successful, until they weren't. |
How do Dimensions work? | In maths there are an infinite number of dimensions. In the real world we don't know how many dimensions exist. Interdimensional travel means you are moving to a different dimension, imagine being 2D, interacting with a giant 3D apple if you are 2D you will interact with each 3D layer separately so your apple looks lik... |
Why don’t we feel the Earth rotate if it’s spinning so fast? | Take a ball. Rotate that ball slow enough that it only manages to do full rotation once every 24 hours. That's how slow we're spinning. You can still detect that slow rotation with things like pendulums. People in this thread keep saying it's not possible to constant velocity motion, but actually we don't have constant... |
Exercise is supposed to be good for the heart - how does forcing a finite organ to work harder not just wear it out faster? | People have addressed the muscle part of it in other comments but there is also another reason. When you exercise, certain hormones are released that relax your blood vessels so that you can move blood more efficiently. Over time as you exercise more and more this makes your blood vessels more limber in general which c... |
That disgusting morning breath. How does it form? Why does it stink so bad? How do we counter it? | There exists a whole colony of hundreds of kinds of bacteria in your mouth. Over night, they don't stop eating bits of food and pooping in your mouth. The smell is specifically one kind of poop called volatile sulfur compounds. Sulfur smells bad.I can tell you one thing that will counter it, a CPAP machine. I NEVER hav... |
How does bail work? Do you get it back if you’re found innocent? Convicted? | When you get arrested and charged for a crime they need a way to make sure you show up for your court date. They can hold you in jail, or you give them a sum of money as collateral. If you show up for your trial you get it back, if you don't they court keeps it and orders you arrested. This happens regardless if you're... |
Why are there not big patches of strawberries in wild areas of public lands? | They're not that hardy. Cold kills strawberries easily. Wild strawberry does grow .wild where climate allows. |
If the US is a secular state why does the dollar bill say "in God we trust" | Gotta stick it to those godless commies. In god we trust was added to the paper currency in the 50s as a way to add another layer of distinction between us and the USSR. It should be noted that this isn't the origin of the statement as it was used on some state coins going back to the 1800s. It wouldnt be the official ... |
Why can't we artificially make plastic decompose faster? | The problem is that plastic is such a good material because its resistant to all the things that would normally decompose a material. Its physically robust but easy to shape, its fairly sterile, doesn't allow water/air to seep through it, it doesn't age, its really hard to burn, nothing eats it, its up there with glass... |
How does looking at a bright light help with sneezing? | I'm not sure why but when I look directly up at the sky, I easily get triggered to sneeze. Is this the same thing?", 'It’s not fully understood, there is a theory that this reflex helps reduce the spread of germs because instead of sneezing in your warm, germ friendly hut/cave where illness could be passed on to others... |
How did old hand-drawn animation achieve such consistent color? | Finally something I can answer! I have studied under a traditional animation cel-painter that worked on Disney and Bluth films, I can give some background. When studios wanted to get colors to always match up, there were whole groups of people that spend all day being color scientists. They do lots of research and scie... |
Why are we groggy when we first wake up? | Brain pumps a paralytic agent as well as a drowsiness causing agent to keep you asleep. You feel drowsy and unable to move properly because the effects of those agents haven't worn off yet", 'Imagine your car is in the garage getting light repairs, on a variety of parts, all night long. The following morning when you t... |
What does an MEP do and why is it important that we vote? | A Member of the European Parliament is a politician elected by citizens of a country to represent that country in the European Parliament. It's important you vote because democracy relies on people voting. If you don't vote, you don't get a say in who is going to represent you in politics. |
Why do bugs like to buzz around people's heads, even when being constantly swatted at? | Bugs buzz around people, poles, signs or other similarity shaped things to try and meet up with other bugs, usually for mating. They need landmarks like that to find each other, similar to how if your meeting up with a group of friends in a busy area you'll use a fountain or a storefront as a meeting area. Only bugs do... |
why are most states’ capitals not their largest city? | I'll take a stab. My first try so be kind. And this will be simplistic. In short, cities generally become large because it may be an entry for immigrants who decide to go no further or a great deal of foreign trade or jobs whereas capitals are chosen because they're easily accessible to all the politicians that must tr... |
Why do thick books set off the alarm when going through security at the airport? | It's the same logic as to why security staff asks users to remove electronic devices from baggage: a thick mass of paper will likely absorb most x-ray radiation passing through it, creating a large space of a 2-dimensional image where the staff can't reliably see anything else there.A thick book registers as a large re... |
Why are Firecrackers so dangerous in enclosed spaces? | When something explodes it releases lots of gasses VERY fast. Those gasses have to go somewhere and they will go through anything they have to in order to get there. Exposed to open air that means almost nothing. Might burn but those gasses can just expand all they want. In an enclosed space though, those same gasses c... |
How did identity and identifying people work before pictures? | I would suggest that a letter from a person who is known to a recieving part worked fine. A handwriten letter contains many hints proving that it's origin. Script, a sign, a seal, facts and names in the text, manner of expressing thoughts, etc. |
Why we can't actively hallucinate | You sort of can. It would normally mean your body isn't working properly, though. Basically, if you could actively enter a trippy state, you'd possibly die as an animal, so evolution weeds that out. The closet you get naturally and healthily is hypnogogic hallucinations, which is a scary word for dreaming while you're ... |
how the moon can drift away from earth despite earth’s immense gravity on the moon relative to other celestial objects | The moon isn't drifting away from the Earth despite the Earth's gravity, it's drifting away *because* of Earth's gravity Tides are the result of the Moon's gravity causes the Earth to bulge towards the moon. This bulge pulls on the moon a little extra than normal. The moon takes about 27 days to orbit the Earth, and th... |
How come we measured the radiation from the Big Bang? | Imagine the big bang less like a bomb, spitting out debris into empty space, more like a balloon being blown up. Now mark two points on a balloon as you blow it up, as the balloon expands the marks stay where they are but they appear further apart. Now imagine you're an ant trying to travel between those two marks as t... |
What was Einstein’s meaning of time when he says time is only an illusion. | Time is a dimension of spacetime. We move through it at what we perceive as a constant rate of one second per second. This perception isn't reality, at least in more extreme and curved parts of the Universe. The illusion is persistent because our experience is just with one tiny planet around one ordinary star.absolute... |
How come dry skin doesn't absorb moisture from showers and continually stays dry, but lotion helps? | My understanding is that lotion doesn't add moisture to the skin, but makes a barrier to lock in the moisture that your body already makes and tries to excrete ", '"moist" skin is essentially healthy oily skin. the Shower causes your skin to dry out. The water does not contribute to the moisture of your skin. the water... |
Why doesn’t a fly hit the back of the car if it’s flying in it? | Because it is moving forward with the car. Everything in the car has the same velocity. Try throwing a ball up in the air next time you're a passenger, it doesn't hit you in the face.Because the fly is in the air which is inside the car. The car pushes this air with it thus pushing the fly as well. |
If everyone actually recycled their plastic, would using plastic be ok for the environment? Is not recycling the real issue? | Recycling still has an environmental impact, although less than manufacturing new plastics. Not all plastic can be recycled either, and recycling is not very profitable. We used to export a lot of our recycling to China, but they don't accept it anymore, leading to a shortage of places to process it. So while recycling... |
How do G-suits work? | When you get your blood pressure measured, a small strap squeezes your arm. A G-suit works in a similar way, except it uses much more force and has bigger and many more of the air bladder throughout the suit. These air bladders are hooked up to an air compressor inside of the plane. When you enter a high-G maneuver, , ... |
How can France starve Vincent Lambert? | The same way they do in the US, by removing support. He's in a vegetative state, and his wife decided to give up, and let him die. So they disconnect all the machinery and wait. |
How can humans not be immune to pollen | I don't have allergies so I guess technically I am someone who is immune to pollen. If I understand it correctly, allergies are an over response by your immune system not a deficient one. So your ancestors probably evolved in an area with low pollen and now when you experience large amounts, your immune system is like,... |
Why does an extra proton here or there make such a difference in the properties of an element? | Protons actually have little influence over the way atoms interact with one another. Electrons, on the other hand, are the subatomic particle capable of coming into contact with other atoms. Electrons live in different orbits around the nucleus. The inner orbits don't interact much with other atoms, so we can ignore th... |
Why is it so necessary to leave a tip in the US? | It's just another fun way to keep the lower class in their place. Why should a business pay their employees when they can pass the onus onto the customer, who isn't even legally obligated to do so?", 'Because they don’t pay restaurant workers a living wage in the US. That’s why a lot of people in the industry are super... |
Why do dark bags form under your eyes from lack of sleep? | It can also be genetic - as in melanin distribution. I'm very pale but had the dark under-eye , since I was about 8. I loved to sleep, I was never sleep deprived , but yeah.. got in trouble at school too for 'wearing brown eyeshadow' and the teachers would never believe me until they tried to clean it off and they coul... |
What exactly is radiation and how does it treat cancer but also kill you? | Keep in mind, Cancer is still part of you. Radiation therapy is literally just using radiation to selectively kill only the *bad* parts of you. It absolutely still kills parts of you that weren't supposed to be killed But that collateral damage is worth it for the chance at stopping a cancer in time to save the rest of... |
How does adding 's' to end of 'http' make it protected against hackers? | HTTP and HTTPS are two different protocols with HTTPS being newer and using a better security standard. HTTP doesnt encrypt while HTTPS does. This basically means if you have someone in your network that listens with a program like wireshark to what you're doing , they'll see in clear text whats being sent and received... |
Why do military units carry the same formation through history such as the 450 year old 2nd dragoon regiment in France. | It also has to do with span of control. An individual leader can only control a finite number of subordinates. Depending on the situation and leadership philosophy somewhere between 4 and 10 so you end up with ten men squads led by squad leaders 4 of whom report to the platoon leaders. 5 of them report to a company com... |
How come USA came about using the metric system and why are they still using it? | You're confused, the USA still uses the [imperial system]. The imperial system was used in many countries but was [replaced with the metric system] in most of them during the 19th and 20th centuries. Officially the US uses the metric system as well, but the imperial system is still more commonly used. |
To someone who does watch GOT, what was so bad about the last episodes? | The first seasons were character focused. The characters were written to do what felt natural to them, the story was the consequence of their actions. The last season was story focused. The characters made decisions that were either out of character or their development had not gotten to that stage yet as to get to the... |
What causes diet sweets to give you diarrhea? what actually happens inside your body? | The polyols used in place of sugar have fewer calories because they're not completely absorbed in the body. Because they're not completely absorbed, you have these polyols ending up in your lower intestine, your colon, where they have the same effect as fibers. They 'attract' liquid. Into your colon. Which leads to you... |
How does a network connect to other networks over WAN? | Physically, cables in the ground and undersea cables mostly which go through big telecommunications hubs. Sattelite bandwidth is too expensive to be used for most of it. The devices moving around and directing all the traffic are called routers. There's different languages the routers use called protocols to talk to ea... |
How does a radio prioritize two identical frequencies from two different stations? | In ELI5 terms, radios work the same as people talking in a room. Whoever is loudest will win. If the two people talking are equally loud, then you may hear both, but only pickup bits and pieces of their conversation and sometimes you may not hear anything . |
Why are the majority of glass beer bottles brown. Does it protect the beer somehow? | Yes. Sunlight can damage wine, beer, etc. That's actually why Corona has been having a problem with their beer going bad really easily, clear bottles.Can anyone clarify why lager tends to come in green glass? Is this an industry segment thing or something to do with the properties of that particular style? |
Why do Adblock softwares not work on streaming platforms (Hulu, Fox, TNT, etc.) | Because the ad blockers can't tell what's an ad and what's not. On most websites, the ads come from a separate ad-network. So when you load _URL_0_, it'll have a little widget owned by _URL_1_ which will load an ad. Your adblocker sees the page attempt to load something from _URL_1_ and blocks it. But if the ad and the... |
How can an 2D animated movies or shows have multiple animators whilst maintaining a consistent art style? | The artists all draw in the style chosen by the art direction of the movie, not in their own personal preferred style. Artists may have a distinctive style that sets them apart but it isn't like they can *only* draw that way. |
How does tech keep time when shut off? | Most tech that does this has a clock that keeps running when the device is off. On laptops and computers it's typically powered by a small battery on the motherboard, or sometimes a supercapacitor. Phones will have this circuit, but I think they just run off the battery, they might use a supercap, but I don't know of a... |
How are really tall buildings able to withstand high winds? | Steel frames. They're strong. Tall Buildings are engineered to withstand a certain limit of windspeeds. Then engineering principles say to apply an amount of over engineering as safety factor, typically 1.5x or 2x But should we ever get the much speculated tornado that hits the Loop, no amount of over engineering will ... |
Do we lose metal forever when it rusts? | Rusting is oxidation, oxygen gas is attacking the metal atoms and chemically binding to them. Iron oxide specifically has an annoying tendency to crumble to dust so iron and iron-rich alloys can definitely rust away to nothing. Some other metal oxides stick better and form a protective crust that shields the metal from... |
Why do sun burns hurt when touched and not when they happend? | It's because it mostly damages the DNA in the cells, but leaves the rest of it more or less alone. You don't notice until the cells try to divide and can't because the blueprint to make a new cell has been destroyed. It's the same reason sun exposure causes skin cancer. Sometimes it fucks the DNA up just enough that it... |
Why isn't our body fit and with muscled by default? | Cos it takes body resources to maintain those muscles. Your body is very efficient, it wants to use as little resources as possible. If you don't use it, you'll lose it. Your overly large muscles will atrophy if it's not used. Have you seen the legs of people who are paralysed waist down? They're very small and undevel... |
How do all servers across the world ensure unique IP addresses? | It's not actually the case. Unique addresses are required for a particular network but not for every computer there ever is. It's like how you can't have two cities with identical names in the same state, but two states can each have a city with the same name. |
In tv shows and movies, why do really giant people/creatures always move so slow? | It's movie magic in the ant man case, but it probably because real big animals tend to act that way for scientific reasons. So our brains are rigged up to form that connection. Things such as large whales tend to move more ponderously than things like dolphins. Part of it is the square cube law. Imagine a cube shaped w... |
Could the world eventually become one race through the interbreeding of races over time? | The short answer is yes. The slightly longer answer is yes, we are not really divided into races in a biological sense as it is. The long answer includes an explanation of how skin color genes work, and how human migration history and environment together explain why people look different in different areas of the plan... |
What's the digital process of lowering the quality of a photo or video? Also is the opposite process a thing or just movie things? | Removing information from the file lowers quality, basically. Some things that can be done: switching millions of colors into thousands, blending similar pixels together, removing light beyond the visible spectrum of the eye , compressing audio above or below the threshold of human hearing, etc. All of these tactics ca... |
how does acute radiation poisoning induce vomiting, nausea within just tens of minutes of exposure, and in more serious cases, instant loss of consciousnesses? | The short and honest answer is that we don't really know. The later effects of radiation poisoning are well understood, and is explained by how the cells are killed as they try to divide. This is a relatively slow effect that manifests during cell division. But it doesn't explain the reasons for the onset of prompt eff... |
What causes glitch worlds/levels in video games? | Especially in older consoles, the code is written very compactly, with little extra space for extra information. So, if something is done to overflow an expected value beyond it's bounds, it creates unexpected results elsewhere, like changing sprites to the wrong location. In Pokemon , if you name yourself certain ways... |
How do home users use virtual machines | > How do home users use virtual machines & #x200B; That's a really open question. They can use them just as an operations team can - install a hypervisor on a computer and go to town. & #x200B; How can they use them practically? Well that's a different story. Frankly, there is limited utility in complete virtualizatio... |
Why do remote controls use infrared light instead of other wavelengths? | IR sensors are cheap and easy to manufacturer and do not require approval from the FCC. Since you'll always be facing the TV, there's no need for an RF remote, as the IR sensor will always be facing you. Also, since IR is mostly limited to line of sight, it's highly unlikely that if your neighbor has the same make and ... |
Why do passenger planes keep life vests and no parachutes under every seat? | Basically, parachutes are useless on passenger planes. When you're taking off or landing, you're going too fast for them to be effective. When you're at cruising altitude, you're too high up for them to work, you'd pass out from a lack of oxygen or freeze to death. A parachute would only be useful if the plane was goin... |
Why is it much easier to put a ring on a finger than to take it off? | Besides what everyone else have said, throughout the day depending on how much water you drink and sodium you intake, your skin expands and retracts throughout the day. Water weight is real my dude, and fluctuates a lot more in women, who i'm assuming wear more rings than men, due to hormones too. Bodies are weird and ... |
Why is there a delay when a TV guest is being interviewed via satellite in 2019? | Satellite delay. Radio waves travel ~speed of light, but it still has a pretty far distance to go. Assuming the processing and transmission equipment does not introduce its own delay, the time from one station - > satellite is ~270 ms. Then it has to go satellite - > station B. So that's over half a second. Then the pe... |
Why is it that babies like being rocked to sleep yet as we get older rocking can be uncomfortable such as on a boat? | Humans sense of balance is largely derived from bubbles of fluid by our ears. The fluid moves around as we move like a bubble in a carpenter's level. But the fluid gets thicker as we age and is less accurate for tracking movement. So while children like merry go rounds and usually don't get carsick, as humans age they ... |
Why do some cuts leave scars and others don’t? | Most cuts that reach the deep layer of skin will cause scarring; it's just a matter of how obvious they are when they heal. Scar tissue is a particular type of tissue that is different from the cells surrounding it and will typically be a whitish color. If a scar is small, you may not notice it at all among the hair or... |
How are international treaties "binding?" | They're only binding inasmuch as other countries want to agree to them or have the power to enforce them. This generally means major powers can violate or abrogate treaties as they please while enforcing others to abide by the same treaties. In your example, there's nothing to stop the U.S. from failing to defend Canad... |
How I have a blue eyed child when eye have brown eyes and my husband has hazel eyes. | There was just an [It's Okay to Be Smart video about this topic]. It basically boils down to: there are a lot more genes involved in eye color than the typical dominant/recessive understanding covers. ", 'If you both carry the recessive gene it can be passed on to the kid. If they get it from both sides they have blue ... |
What role do companies like Visa and MasterCard play in credit cards and why can’t banks issue their own cards? | Visa and Mastercard along with discover and amex are credit card processors. Which mean that all transactions go through their network. Banks issue their own branded credit cards using one of the 4 processors and take a cut but they dont want to setup their own network and then get people and merchants to adopt. Visa/m... |
What exactly a 'server' in IT | a server is just a computer that hosts the files or services that other computers can retrieve. the computer you're using right now could become a server merely by allowing other computers to access the files on it", 'Computer language has a lot of metaphors which comes come from real life. For example the concept of m... |
Why would someone plead the fifth if they weren’t guilty of a crime? What else could the fifth amendment be used for? | The Fifth amendment keeps you from having to testify against yourself Let's say you get picked up for a homicide because you were seen near the slum at about the right time. You were actually over there to get some Coke. If asked why you were over there you would incriminate yourself of a different crime, or you'll lie... |
What do spies do in real life? | Annie Jacobson was on Joe Rogan's [podcast]. She wrote a book on the subject. She gives some good info in the video. |
Why are there 2 types of screws/screwdrivers? Doesn't it just make it inconvenient to have to find a matching screwdriver? | Probably wrong but I saw a Japanese TV show that explained that Phillips screws are for when you need more torque for a firmer fasten. Also, flat head screws were used more for outside because if gunk ever got into a flat head screw you could easily clear it by swiping at it with the flat of the screwdriver to clear an... |
How does Coast Guard monitor multiple radio channels? | It's most likely a team of radio operators assigned channels to monitor. I've done volunteer work as a radio operator for mass casualty training scenarios and it's usually one man to a radio per channel that needs to be monitored. Not sure if this is how the coast guard does it, though, but it seems to be pretty standa... |
Ocean phytoplankton and algae produce 70-80% of the earths atmospheric oxygen. Why is tree conservation for oxygen so popular over ocean conservation then? | So, a lot of posts here are bringing up the role that the ocean plays in the average persons mind. It may well be true that it's easier for people to imagine the productive value of a forest than an ocean. However, I'd argue that a lot of these are missing a bigget issue, which is that much of the ocean production is l... |
why can’t you suck on a straw after tooth extraction? | The force of the suction could injure the tooth socket, because it's in a very delicate state until it has an opportunity to heal.I threw some wet cotton balls over my holes and smoked the whole time I was recovering. No dry socket. |
What is "Keynesian" Economics? | I'm no expert mind, but the way I understand it. Keynesian economics was about redefining how the state acts in a market economy to mitigate its boom and bust cycles as a reaction to the great depression. Theres a strong emphasis on regulation of money and monetary policy. |
Why are human interactions under the influence of alcohol easier? | Alcohol affects a friend in our brain called GABA. GABA is a chill guy, people like being around him. Too much of GABA, and he ends up making you do stupid stuff and feeling really awesome and with GABA, you feel more confident. GABA is that cool kid you wanna be. When you see GABA less, you don't feel the confidence y... |
Wisdom teeth extraction - couldn’t it be simpler? | I had quite a few teeth back there removed as a child, so I never had any problems at all with my wisdom teeth I don't think this is practical or a good ideas in most cases |
Why is it that most domesticated mammals and birds seem to have "personalities" and "emotions", but fish and reptiles do not? | Psychological research is pretty much agreeing that phenomenology is barely measurable. We do not know what the fish subjectively experiences, and thus we cannot rule out that the fish has a personality and/or feelings. I also don't like the distinction between pain and aversive stimuli. What on earth makes us think th... |
Why aren’t helicopters used to rescue hikers and remove bodies from Mt. Everest? | Imagine climbing a tree. The higher you go up, the less stable you become as the tree branch starts to bend. Once you reach a certain point, the tree can no longer hold your weight and it breaks. The same issue affects helicopters, except instead of how thick the branch is, it's how thick the air is. Once helicopters g... |
What are investment banks and how do they function? | People who don't trade w their own money but the publics. Hedge funds r the real ogs cuz they trades their own money |
How can airports have flights to any destination you select on any day you need to fly? | Flights are scheduled about a year in advance. You'll also see that not every city has a direct flight between them, some have layovers. Airlines have historical travel data that show where most of their travelers are going and when, and they set up routes thst are expected to be mostly full - if a route becomes unprof... |
What is gerrymandering and how does it happen? | That what has been answered well. Here's an answer to the how. On a state level, a lot of states have their district lines drawn by their own legislators. They usually get redrawn every 10 years in response to updated census information. If you're in office, you want an easy path to victory. So say I am a Republican an... |
How does 2 day shipping or overnight shipping work? | Large companies like Amazon have many vast warehouses across the country and can dispatch from the closest one. And when necessary, air cargo is utilized, where as longer shipping times go by truck. Most shipping companies have a hub and spoke system, where trucks pick up from warehouses and it get taken to airport, fl... |
Why does it seem so challenging now to send a manned crew to the moon, when we were able to accomplish this over 50 years ago? | Space travel is always challenging, but I would argue it has more to do with motivation. After the Apollo missions, there just hasn't been a need or want to go back. We all have our sci-fi desires, but until there is money to be made , there hasn't been a point to go back. That mood encouragingly seems to be shifting a... |
Why does our brain see everything upside-down? | because the brain evolved to be adaptive.to read it's input neurons and construct your perception of the world. There had been simple tests with a switching google which turned the view again. the participants could adapt after a few days. And taking it off they adapted again . |
How do those cables they string across the road measure your vehicle speed? | They are a known distance apart, so it's simple to calculate your speed based on the time it takes for your wheel to run over the 1st and then the 2nd cable. However their primary purpose is for traffic counting. |
Why do some batteries use kWh to define the capacity and other batteries use mAh? | Well you can convert pretty easily between watts and amps if you know the voltage. It's probably just tradition in how they rate themselves. For instance you wouldn't expect car batteries and flashlight batteries to use the same scheme, would you? |
Why the bass is so important to music in general, even though it doesn't sound loud in most songs? | But it's great when the Bass just lets loose too. My favorite example of this right now is Skameleon's cover of 'What is Love'. Go over to youtube and watch it. Right after the bridge, the bassist steps forward and lays down some righeous bars .The drummer is your goalkeeper.The bass is your defence.The guitar is your ... |
How did ancient people eat or even have teeth without any efficient way of cleaning them? Did they get toothaches and cavities often? | 1. Different diet- most important less sugar and less refined products. 2. Smaller life expectancy. Yeah people died really young back then3. Charcoal. It isn't as good as modern pastes.. but quite good enough4. Chewing on medicinal herbs/leaves/branches.They ate paleo when fruits werent genetically modified to be supe... |
Why is bacteria so quickly becoming resistant to antibiotics and yet cooking your food still effectively kills all the bacteria? | There are some things that will kill everything alive, such as enough heat to cook food. The reason it kills everything alive is that these things target something common to all living thngs. In this case, it's being mostly water and molecules that rapidly lose shape if they are heated above a certain point. Antibiotic... |
Why do the calculator and the phone not share the same number placement/ pattern? | Numberphile did a video on why the number layout is what it is on phones, and they talk a little bit about the calculator layout too. The calculator layout was not made for the average person, whereas the phone layout had to be easy to use for everyone. Here's the video: & #x200B; [_URL_0_] |
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