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If the entire global electrical grid was fried (by a coronal mass ejection or something similar) would the internet be salvageable? | Yes. The internet was originally designed to survive a **thermonuclear war**. It's completely decentralized, so whichever side of the planet wasn't hit would still be okay. With modern content distribution networks and anycast technologies, they'd still be able to access sites and services nominally run from the affect... |
Why are airlines specific about the weight of bags when the passengers weight vary so much? | As a society we are in favor of accommodating people's physical differences. Even though it costs a bit more to fly a 100kg person than a 50kg person, we charge them the same. But people have complete control over the weight of what they choose to pack — it's not a hereditary or medical condition. |
why cycling burns more calories while walking is harder & tougher? | ~~Actually, cycling and walking 'burn' roughly the same amount of calories if you don't count per unit time but instead in terms of distance covered: Walking one kilometre and cycling one kilometre burn the about the same amount of calories, walking just takes more time to do so.~~ Edit: I misremembered this, actually ... |
Instant death by Neck Breaking | you don't die instantly, but without immediate care you wont live for very long either your breathing and heart are compromised and depending on the severity you might no longer be able ot move, which in some settings it might aswell kill you instantly, since your diafragm went poof.Example: when Christopher Reeve’s ne... |
Why is it that when someone needs to sneeze but can’t quite get it out, looking at a bright light helps? | I experience that as well, and was surprised to learn not everyone has that reaction. Some of my siblings are aware of it, so I guess heredity is a factor. I've heard it called **ADCHOO**—Autosomal Dominant Compelling Helio-Ophthalmic Outburst, or 'sun sneezing'. Sometimes just walking outside on a sunny day will trigg... |
What is the logic as to why we do not have universal health care in the United States? | It's not about logic. Some people and corporations. make a LOT of money on the us current health care system. these corporations can use the money to bribe our politicians. But they don't call it bribes they call it campaign donations.In universal healthcare everybody healthy pays for those few who are sick. So America... |
Whenever I buy a video game disc, (Xbox, Ps4, etc.) It says it needs to download the game into the console. Isn't the game already on the disc? | Nowadays, no. Often times the only files on the disc are an installer and a form of identify verification. The installer provides your device with the instructions for finding, downloading, and installing the game from wherever it is hosted. The identify verification ensures that you have a real disc in the device and ... |
Why are Animals scared of us Humans? | Thousands of years of humans killing literally anything that we can eat. Think of The Lost World: Jurassic Park when the Compy wasn't afraid when it saw humans. It had no reason to be afraid until that dweeb started zapping them. |
We don’t dare eat dirty food off the ground in fear of getting sick, but how do animals’ stomachs handle food on the ground full of dirt and germs? | More robust immune systems Often a lower quality of life being the norm Many of them have health problems and it does impact them, they are just good at hiding them. carnivores tend to have fresher meats that don't have as much bacteria in them as meat that's been killed days prior. |
We know that competition lowers price but why does it not work for healthcare in America? | Many people only seek healthcare when they are sick and often times they need it quickly. They don't have time to stop and compare prices. Also with the complex system of health insurance, often it can be confusing and very difficult to figure out how much something will cost the patient. |
do school degrees transfer if you move to another country? | Each country has it's own set of rules for accepting international degrees, I suggest you Google what is required of you before you move |
- How did Dubai become so wealthy? | * From 1770 to the 1930s Dubai was big for the pearl industry.* In the 1950s Abu Dhabi had oil and Dubai had nothing.* In the 1960s, Dubai invested in an airport and tourism. They discovered a tiny amount of oil that helped fund infrastructure.* In the 1980s, they went with a free market capitalist approach which appea... |
Why does the uterine lining have to shed every month? | We're not completely sure, actually. So first of all, the body can't just use the same lining for a long period of time because that's expensive to do . The body can really only afford to maintain a rich uterine lining a few days at a time. Women need to have a cycle. But most mammals don't *shed* the uterine lining: t... |
Why was the draft so much more controversial during The Vietnam War than it was during World War II? | It's not that the draft itself was any more or less controversial, the war was. WW2 was widely supported but many people didn't want to serve in Vietnam or see their loved ones go fight a war they didn't support. |
What is 99.9% "empty space" in an atom, exactly? | There are forces in that space. It's inside an atom, so there isn't room for anything else. |
Why don’t concert tickets have the customers name on them like airplane tickets? | It's really hard for big venues to check each person's identity with the ticket, also, countries like the US do not have mandatory IDs like some others", 'Because promoters and venue operators are in favor of scalpers. They cause a concert to sell out fast, and "show sold out in 30 minutes" makes great marketing for th... |
How can the gravity from the sun keep the planets locked in orbit, but we are weightless in space. | > How is it strong enough to pull on the earth but not on a person? It does pull a person. Objects in orbit around the Earth aren't really weightless, the ISS for instance still experiences 90% of the gravity on the surface. However, it is falling 'sideways' so fast that before it goes down far enough to hit the earth,... |
What is a polar vortex and why is the United States' midwest suffering because of it? | Polar vortex's are a basically circular winds that form around the northern hemisphere. They are caused by a difference in temperature between the High pressure polar regions and lower pressure oceanic regions. These polar vortex contain the cold weather that occurs over poles. The problem comes from the polar regions ... |
what do academic mathematicians research that we don't know yet? | A great way I've heard math described is: Math is a game where you make marks on a paper, then you set up some rules on how you're allowed to move those marks around, then you see what you can do within those rules. The point of math isn't always to develop some useful tool for some other field of study, but to study p... |
How do people get snuck up on by trains when they're so loud? | I've worked around trains and when train cars disconnect they can roll almost completely silently. The whole train can start moving without warning and without sound. You definitely cannot hear them well when they start moving unless they blow the horn. |
Why do emergency sirens sound different in the US versus in Europe? | Part of the answer is that after 2 World Wars fought on its soil, Europe has reserved sirens for civil defense use. You don't want people thinking there is an air raid when an ambulance is passing by. |
What is causing the current polar vortex in the US? | The polar vortex is a usually pretty stable condition where cold, dense and low-pressure air circles eastwards around Earth's poles . It is basically a permanent giant storm at the poles, and is stable exactly because the air around the poles is usually very cold and therefore low-pressure and is kept in place by the h... |
why do people “stare into the sky” when intensely trying to remember/solve something | Less distractions. If you're looking straight ahead there are likely people or other things that could possibly move to distract you, while that probably won't happen above you. |
If siblings take "Ancesotry DNA Tests" will their results be the same? | I think there might be differences between xy and xx as mitochondrial DNA only gets passed through xx, but I expect the would be very little variation otherwise. Someone please correct me if I'm wrong though |
Why do most people find rats unappealing but other rodents such as squirrel and hamsters cute? | I'm gonna shoot in the dark and guess that's because hamsters don't eat your windowsills at night. |
Dungeons and Dragons. My boyfriend is really into D & D and his favorite show is Critical Role. I want to get into it but I don’t really understand it. | It's make believe with rules. There's a book with rules. But that's not too important. Just think about what your character would do in whatever garbage situation your in. And do that. Theres rules for figuring out how it plays out but as for what you can and can't TRY to do .that's up to you. I'm sure you're gonna get... |
Why do semi trucks have spikes on the rims of their front tires? | Semi's are big, and by big, I mean wide. They pretty much take up the whole lane. The spikes are attention getters and with the wheels being more visible to an average driver they are more visible. The spikes serve the purpose of reminding car drivers not to drift into the lane. An accidental drift car to car is will c... |
How exactly plants deconstruct C02 during photosynthesis and why it's so difficult to do something similar on an industrial scale to reduce carbon in the atmosphere | The process you're asking about is **carbon fixation**. It uses an enzyme called **rubisco** which is believed to be the most abundant enzyme on the planet. The reason we're not able to do this artificially is because we still lack the technology to replicate things on a micro scale that have been perfected by evolutio... |
the difference between dew point and humidity | There are two humidities: relative and absolute. Absolute is the actual amount of water in the volume of air, say 5 gm/L. Relative is the amount of water present based on that volume of air at that given temperature. Air will hold less water as it cools. Let's say you have a very damp cloth in your hand, and it squeeze... |
why do hot metals and objects always turn red when they are very hot? | All materials will turn red when heated past a certain point. It is just that most materials will undergo some chemical reaction long before getting to that point. You yourself are currently giving up that very same sort of glow that makes hot metals glow red. Since you are a lot cooler than that though you are giving ... |
How come our wet little delicate eyeballs don't feel cold in below freezing weather? | Your corneas do actually freeze when swimming in ice water. Wim Hof the ice man swam like 25 meters under the ice and his story was scary because he couldn't see shit anymore because his corneas froze. EDIT: _URL_0_ Here he is, this is his Guinness world records attempt and he wears goggles on this video because of wel... |
If "our saliva breaks down fat and carbs", why isn't saliva and flushing with water enough to keep our teeth clean and healthy? | Saliva only breaks certain carbs down. It doesn't do anything to break down fats or proteins. Chewing is important so that when food gets to your stomach and intestines it can be mixed with other things your body produces which do break down fats and proteins. |
What would happen to Earth if the Moon was all of a sudden gone? | No lunar tides for sure. No more drag on the Earth's rotation. Animal and plant life may suffer consequences due to it's absence. |
Why do our bodies crave salt when we need so little of it? | As far as I've seen, theres significant pushback against the claims that salt is the cause of high blood pressure, which was apparently established by a single study. Some odd, furtive motives were present also. |
Why are there 7 musical notes only? | There aren't only 7 notes. The overwhelming majority of modern Western music is written for twelve notes in an octave, or 12-ET . What you'll notice though is that only seven letters are used. This is because modern Western music evolved from a system based on a seven note octave that the human voice more easily falls ... |
Is it worth the effort to wash your hands after peeing, if there's bacteria on the public bathroom tap? | You should wash your hands often. Since you're in the bathroom and there is a sink and soap right there, why not? It seems highly unlikely you'll make another trip, just to wash your hands. You should wash your hands often. |
How does an extension cord overheat? | It comes down to the wire size of the extension cord and the wattage of the heater. The bigger the number of the wire size the smaller the actual circumference of the wire. Smaller wire can't handle larger loads so when you try to run high loads through small wires you can over heat the cables and melt insulation and s... |
Why do anti-biotic medications require a prescription? | Some of them can be toxic at relatively low concentration. One of the principles of pharmacology is that everything is a poison at a high enough dose, but with some of these antibiotics it doesn't take too much to cause problems and serious side effects. Aspirin is also toxin at high doses, but you'd have to take a pre... |
Why are you not hungry after performing excercise | The short answer is that your body turns off the release of the hormone responsible for feelings of hunger following intense exercise. Could be an evolutionary response in the sense that you can't afford to feel hungry while running from an animal that's trying to eat you. |
With so much free online now, be it legal or illegal. How do professional porn stars/directors make any money. | In addition to the other factors, the rise of free streaming porn did in fact cause a colossal drop in profits for porn producers. Back in the day when you had to buy DVDs and amateurs weren't competition, porn was a *lot* more profitable than it is now. |
How do goats and sheep not walk around in a constant state of concusion with all the headbutting they do? | Cause they're made to. Same way they walk around on their toes all the time and don't get Dancer's Lung . |
How do game companies make a game engine that requires more power than contemporary computers can make? | It's not that those computers couldn't run that mode, it's that they couldn't run it at anything approaching playable framerates. You can always make the art assets and other things beyond what today's computers can run acceptably, Crytek was just the only one to bother since most games will stop being profitable befor... |
How did the solar system begin spinning? | Imagine you are running really fast towards your best friend and when you reach him/her, you grab their hands/arms and hold tight. The speed you gained while running isn't just gone instantly but instead you start to spin around eachother. Now imagine that same reaction is happening when matter is attracted to eachothe... |
How do you win a lifetime of *blank* | I've also seen a limit to what you can get like buying a car with free gas for a year But you only get 20 gallons a month for a year Prevents you from filling up other cars. |
Explain key signatures to me. | All **Major scales** follow this exact pattern: W W H W W W H . Look at a piano keyboard. To start on any given note and play a major scale, you sometimes have to play black keys in order to follow that pattern. The key signature is a way to tell musicians what black keys to include when they're playing. |
How did people from earlier times get clean drinking water without our modern methods? | Usually, the water wasn't as polluted as today. A stream had plenty of fresh water that, had anyone/anything used as a bathroom, would be naturally be filtered. Wells, while mineral rich, normally didn't have bacteria unless the out house was built too close to it. |
When asking about ethnic ancestry, why do most forms ask "Are you Hispanic/Latino" ? | Hispanic/Latino is not considered a race. People who are considered Hispanic/Latino can be white, black, or Native Amerindian, or some mixture of those three. Hispanic/Latino typically refers to people who are from Latin America. Like the United States, Latin America is a racially-diverse place with people of all diffe... |
How does Earth have a magnetic field? | The inner core is solid. The molten outer core can still be involved in induced magnetism, and this is the reason the Earth's magnetic poles wander around. |
how does high amounts of radiation kill someone quickly? | What you're describing is the [acute radiation syndrome], which as you mention, is different from the stochastic effects of radiation . There are many stages of it, depending on how much dose you receive. * For low doses you destroy the blood stem cells in your bone marrow. This means that you're unable to produce whit... |
If atoms are 99.99999% empty space, how can matrer interact without simply passing through one another because there's virtually nothing there? | Because, forces do not need contact. Like if you have two magnets, you don't need them to be in contact to attract themselves, right ? Same here, even if it's mostly empty, forces still work and do their job. There are a specific set of forces that work very well in small scales like that. And even if most of the space... |
What does a cold virus actually ‘get’ from infecting us? | Viruses are basically little chemical machines that continue to exist because the very way they're built produces more of them. Imagine a 3D printer that is programmed to print more 3D printers as long as it's able to take resources from anything else on the planet that has the correct resources. This would serve no pu... |
What does it really mean to be sister/twin cities? Is it just symbolic or do cities get something else out of it? | Sister city arrangments are mostly organized by a group called [Sister Cities International]. It grew out of a desire after World War II to get citizens more involved in international diplomacy. It's largely symbolic, though the organization arranges visits and cross-cultural activities between the paired cities. _URL_... |
If the universe is 13.772 billion years old, how could it have time to expand to be 93 billion light-years across? | The speed of light as the universal speed limit applies to things moving *in* space, not space itself. Space can, and indeed is, expanding at faster than the speed of light. Also it's important to note that it's the *observable* universe that's 93 light years in diameter. We have no idea what size the entire universe i... |
If we can produce phone screens that are 6" in diameter with a full HD resolution, whats stopping us from making 16K TVs? | Cost, failure rate for producing large screens like a diamond, screen size costs climb exponentially because you can always trim a large screen down to make smaller ones if there are dead pixels, etc. but you can't cobble multiple screens into a larger one. |
How do phone mics filter audio based on source (like YouTube vs me talking using the loudspeaker) | It's called phase inversion. Your phone knows the shape of the audio wave that YouTube is sending out and flips it upside down. This makes the peaks into troughs and vice versa, cancelling out those particular sounds it picks up through the mic, but allowing your voice to be singled out. It's the same principle used in... |
Why do the metal tools used in dental cleanings not damage your teeth? | Though weirdly, my dental hygienist is always tell me don't pick up my teeth with my dental picks. Left over from archaeological work |
How does being around other girls change your hormones/period cycle? | No idea, but grew up in a house of girls. It's not always like that people are different but now i have a daughter myself and she doesn't even have a period yet but she seems to get a little more emotional around the time my wife cycles. It could just be she's affected by my wife's mood. |
If light from the andromeda galaxy tookbillions of light years to come to Earth, would this mean the galaxy is closer to us than seen? | Yes and no. Light from Andromeda does not take billions of years to reach us, only about two and a half million years. That does mean the galaxy is a few million years of relative motion closer to us than it appears, but this is such a tiny fraction of its actual distance as to be meaningless. If Andromeda was billions... |
Why is it that we can’t superduper charge our batteries with a super «shock» like one of those heart rescue thingies and it’ll be full? | Other people have talked about the batteries, so I'll talk about those heart rescue thingies. They key thing is that they don't provide any energy. They just reset the rhythm your heart beats at. Your heart muscle cells are supposed to beat in a certain order. First the top two chambers of your heart fills up with bloo... |
I just realized that the muscles around our necks are constantly holding up the weight of our heads for most of the day. Why don’t those muscles ever feel tired or sore? | Because you've done it your entire life and your body has adapted. Ever see a young child/infant? They genuinely can't hold their head up. The muscles adapt over time and it gets easier. Similar to working out. When I first started working out I would be sore almost daily. But after daily training over years and years ... |
What's the significance of the Queen's Guard's Hats? Bonus Explanation: What purpose do they serve in a modern attack with glowing uniforms and massive heads? | If i recall some info I learned correctly the style was adopted from napoleans soldiers to appear bigger and more intimidating as well. I'd assume that's what youd want from a royalty gaurd. |
In the computer world, what causes an HDD and SSD to die over time? | An HDD has moving parts which, with time, will start to degrade. It has a spinning metal disk with a bearing in the center, and, as any other piece in the real world, will eventually fail. There are also moving arms which will also degrade eventually. The information in this case is stored as tiny holes that are drille... |
Can someone explain why there’s actually no way to basically revive something or someone dead? | People don't just randomly die. They die because something is wrong with them. Sometimes you can revive them, by purping in oxygen and restaring the heart. That's why folks learn CPR and put those AED gadgets in the mall and airports. Sometimes you can't. The longer someone is dead, the less likely they can be revived.... |
Why are most one-time password codes five to six digits? | The elders of the internet defined a standard way of generating those codes based on what time it is or how many codes you've generated. That standard says you can generate codes with a minumum of 6 digits and recommended 6-8 digits. It's easier to copy and paste existing code than it is to come up with your own ideas ... |
How are gun laws/restrictions in the United States not immediately violating the 2nd Amendment of the Constitution? | Here is the thing, it is absolutely violating the second amendment. It's the equivalent to a poll tax or censorship. Hopefully the Supreme Court will start hearing 2A cases again soon to put it to reset once and for all. |
Why do things die of old age and why haven’t scientists figured out how to cure it? | Cells die and and get copied and replaced. The copy isn't perfect and we see it as effects of aging. |
what the fuck is a hiccup? | I learned in middle school how to focus and relax my diaphragm, haven't had a problem since. |
How can a password not containing numbers or special characters be considered weak? | Unless you're using a randomly generated chain of letters, most password cracking software have functions built in to use the most commonly used words in passwords. If you set a limit to the length of the password , you go from very predictable, and easily brute-forcible using numbers, to somewhat predictable, and not ... |
If photons are massless, then why do they have momentum and produce a force? And if light has energy wouldn't that mean it has mass? | You're thinking of it the wrong way. Instead of thinking everything with energy has mass. Think of it as mass is a way of storing energy. This is how things that don't have mass have momentum they have energy. The formulae that use mass is just a simplification. |
Why We Can't Remove The Cancer Cells With Surgery? | It's impossible to look at cancer during surgery and know definitively which tissue is bad and which tissue is good. During surgery, doctors will often obtain frozen sections to make sure everything was surgically excised before closing up. The problem is that there might be little stray cells hanging out that have alr... |
Why are plane windows so small? | we have time to drop down a few thousand feet so folks won't be in danger" and "They're all dead, everybody's dead, everybody is dead, Dave" There 'd be no windows at all if designers were allowed to get away with it787 windows are larger than most 19" high, compared to average of 11" or 12". Concorde, since it flew mu... |
- why does water react so violently on a grease fire? | Water and oil don't combust together, its not actually reacting with the oil its just spreading it out. When you heat water enough it becomes steam, steam is significantly less dense so it expands. When you pour a cup of water into oil that's at 200-500C the water sinks to the bottom because it is denser, then rapidly ... |
What does offsides and icing mean? | [Offsides] -- attacking player advances too far in front of the puck. It's sort of a two-phase penalty in the sense that a player can be offsides , but it only gets called if the puck also then travels into that zone while the player are still there. IF they clear out before the puck gets there, then the penalty condit... |
if time is relative how we can say how old the universe is? | Yes, but the differences are tiny anywhere other than the immediate vicinity of a black hole. If the empty space outside a galaxy is a few years older than the space inside the galaxy, what's that matter compared to the 13.7 billion year age of the universe? |
Why could retro cartridge-based games not save player data without a battery backup? Why do modern cartridge-based systems not let you do this as well? | None-volatile storage of that size did not at all exist back then. The best that existed were floppy drives which were not exactly something you could add into a cartridge. They could do something like that today, but it would add a bit to the cost of the cartridge potentially. Most modern gaming devices have their own... |
How does time increase as gravity decreases, and how did we notice or hypothesize this? | Einstein noticed relativity with thought experiments, and proved it with math, then confirmed it with countless experiments from others over the last century. Space and time warp in order to keep the speed of light a constant. It's like this: if you are in a car going 25mph and toss a ball from the back seat to the fro... |
How do (non-flying) animals populate new islands? | Yea most of the time they would cross on land bridges that form when the sea level was lower, then they get cut off. Depending on how far the island is from the mainland, most animals, such as Monitors are surprisingly good swimmers. In rarer cases they can float on natural rafts or floating debris such as logs etc. My... |
How exactly are imaginary numbers useful? | Imaginary numbers get a bad rap because they were poorly named. They're just as real as the real numbers. A few common examples of how they're used: Electric circuits can be described with an equation using a complex variable. You end up with a function that is easy to work with, and what's cool is you can get the resi... |
Does the set of all sets contain itself? | EDIT: I realize this answer is a bit heavy for ELI5, so the tl;dr is that the set of all sets cannot exist under the most commonly used rules for set theory and under those same rules a set cannot be a member of itself. I'm not a set theorist so I might get something wrong here. If you ask, is the set of all sets a mem... |
Why do most U.S. (and probably all over the globe) people sleep in a bed that is held in the air by a frame? | In Japan futons were laid out on the floor instead of a traditional bed. I used one for a few years over there. & #x200B; The perks are that you can fold them up into a closet in the day time and save on floor space. Nice when you're in a tiny one room apartment where space is at a premium. & #x200B; The downside is th... |
How come bacteria can acquire resistance/immunity to certain antibiotics, but humans can't acquire the same resistance to specific disease-carrying bacteria? | If you've ever had a bacterial infection and you don't have it any more, that's because your body became immune to that specific bacteria. This even happens without millions of your relatives having to die first, unlike how bacteria works, it's awesome really. Unfortunately, just like bacteria only become immune to one... |
How do stars explode and create new stars if the reason they exploded was because they ran out of fuel? | In the beginning, stars were huge balls of hydrogen and helium . In the core of the star, hydrogen fused to helium, generating huge amounts of energy that opposed the immense gravity trying to collapse the star. Over time, enough helium accumulated in the core that the rate of fusion dropped, so the amount of energy be... |
Why is it so common to be circumsiced in the US, and not in the rest of the world? | That's not true. Circumcision is much more common in most of Africa, the Middle East, Indonesia, and certain outlier nations like South Korea than in the US. Edit: _URL_0_", 'Circumcision was popularized in the US in large part by Kellogg, of cereal fame. He was a very well respected health advocate, and pushed circumc... |
What has prevented scientists from making CO2 (carbon dioxide) powered vehicles? | How do you think power works? And why did you lead with CO2 and not Nitrogen which is so much more abundant? I'm not putting you down, I'm just curious.When you burn fuel, you are extracting the energy in it, and the resulting carbon dioxide is already “depleted”. You can’t get more energy out of it. It’s like trying t... |
Considering all the talk of colonising Marss, wouldn't it be easier to just make a moon base? | Yes it would be easier. The problem with the moon is the lack of essential elements for life. The moon would be an excellent source of material for construction of structure in orbit of earth or spacecraft for interplanetary travel, but it lack element that support life. It got aluminium, silicate for electronics, magn... |
When breathing, how do our lungs stay "clean" from foreign objects in the air? | The respiratory system has several ways to prevent harmful substances in the air from entering the lungs. Hairs in the nose help filter out large particles. Microscopic hairs, called cilia, are found along the air passages and move in a sweeping motion to keep the airways clean. Our airways are also coating in mucus, w... |
How can boats have holes in the bottom to drop things into the ocean? | It's called a moon pool, or alternatively, a wet porch. There are a number of different designs that all work a little differently. The easiest one to understand are basically a hole in the floor above the waterline of a drilling platform or ship with multiple hulls that lets gives you access to the water. In this case... |
Why are so many video game maps based on NY & LA but almost none on other major cities like Atlanta, Detroit, or Seattle? | There are a number of games based on Miami, New Orleans, San Francisco, and Washington D.C. too. A video game map has to be instantly recognizable as that setting, or there's no point in basing it on a real city. |
How do we know what different parts of the brain do? | Several ways: * Surgically removing the equivalent part of the brain in animals and seeing what happens.* Looking at people who have damage to a particular reason, either from an accident or something like a stroke.* Using brain scanning methods. These include things like PET , fMRI and ECG . None of these directly mea... |
What process does a rape kit use to tell if someone has been raped or not? | The rape kit itself swabs for DNA typically, which doesn't tell you anything about consent by itself. But the physical exam that accompanies the rape kit looks for bruises, cuts, tearing, and other defensive injuries to help determine if the victim was fighting the attacker. That can be evidence of consent or the lack ... |
Explain how identical twins are actually a copy | Is your family member religious? There may be some cognitive dissonance going on. Identical twins sort of disprove the argument of 'life begins at conception'. As do [human chimeras], where two non-identical embryos merge to form a single person.An embryo isn’t “in” an egg. An egg is a single cell, and if you want to c... |
Why is inflation good for a country's economy and why is a 2% rate ideal? | One bit others haven't touched on is inflation makes debts easier to pay over time and increases economic growth that way. Whereas with deflation you'd be trying to pay off a $150k mortgage with your pay getting smaller and smaller each year and would likely be in negative equity due to the house price also falling. |
how were the trigonometry tables for sine, cosine, and tangent discovered without a calculator? | I don't know if it's how it was done historically, but you can approximate trig functions by hand using Taylor and maclaurin series. Basically it just means coming up with a polynomial that's really close to one of the trig functions and then evaluating the polynomial by hand. |
How did electron knows which path is shorter? (e.g How electricity will choose to flows through metal rather than wood) | It doesn't know, but instead it is a special case of laminar flow - _URL_0_ -basically they follow the one in front. Imagine that you have two electrons and two really tiny rods one made of wood and one of metal behind the two electrons is a whole stack of other electrons waiting for either of the first two to move. No... |
Where did the cracking noise go when someone receives a text message? | The problem with interference came around when the GSM phones became popular in the late 90's. It went away because it was a pretty rude awakening for all manufacturers of audio technology that they needed to improve their products. It still happens from time to time if you stumble upon some cheap products. And some of... |
How do bees survive if we keep taking honey from them? | New beekeeper here. Bees make way more honey than they actually need. Depending on what flowers are in bloom you can take honey at different times of the year and get different flavors of honey. We just make sure to leave them enough to make it through winter and feed them sugar water if they didn't make enough on thei... |
Where do dinosaurs fit into the timeline of Christianity? | They don't. Creationists will tell you that they existed at the same time as Adam and Eve. If they believed the earth was 4.5 billion years old, it would fit more easily into their ideology, but since they don't, it doesn't.They do not. Some Young Earth Creationists try to fit them into the narrative, even going so far... |
If the sun is hot, why is space cold? | It's really not all that useful to talk about the temperature of space, at least in the conventional sense. In space there isn't really a lot of stuff that can have a temperature, it's pretty empty, a near perfect vacuum. This means it's neither hot nor cold because it's not a thing, it is just space. The reason you ma... |
Why doesn't the ISS (or anything in space) cast a huge shadow across land directly beneath? | It does. They do! What do you think a solar eclipse is? It's the moon's shadow being cast on Earth, though it's of course a lot more noticeable because the moon is big enough to block out the sun entirely for a brief moment. Even for something as large as the moon however, only a very very small part of the Earth would... |
How can a company be massively successful in one country but bankrupt in another? | Different markets end up having different preferences. The rise of cheaper online outlets for CD and then digital music killed off most record stores in the U.S. But Japan may have more desire for tangible media for various reasons. And as far as the companies are concerned, different countries' versions are often enti... |
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