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How does a completely unregulated free-market deal with pollution? | It's a question of how you define free market. The atmosphere is a *shared public good,* something we all use and all have access to jointly, so it cannot be sold in slices. A free market may involve setting a total amount of allowed pollution shares, and then allowing these to be traded freely among any parties who wi... |
Why don't iPhones have a removable and replaceable battery? | Apple believes some or all of the following, either publicly or privately; - Apple users can't be bothered to do this kind of work themselves- Apple users are not smart enough to /not/ mess it up- Some users might do crazy things like keep using old phones longer by replacing faulty parts- Some users might actually inc... |
How is it possible when Charlie Sheen had unprotected sex when he was HIV+ that he did not infect his partners? | You do not instantly get HIV by having sex with a HIV infected person, In fact the risk is actually quite low. A meta-analysis of 10 studies exploring the risk of transmission through vaginal sex was published in 2009.4 It estimated the risk of HIV transmission through receptive vaginal sex to be 0.08% . A meta-analysi... |
Why does it "hurt" when water enters through the nostrils? | Water is not supposed to go in your nostrils. Water coming in your nostrils happens when you're drowning. Your body doesn't want to drown. Therefore, your body has evolved to cause you pain when water enters your nose, so that you'll stop water from entering your nose and not drown.From an evolutionary standpoint getti... |
What is a "tumor seed" ? | It's not a commonly used term. He probably meant metastases, which are individual or small numbers of cancer cells growing outside the main cancerous tissue. If you remove the cancer itself, but there are still metastases in your body, the cancer might grow back from these cells.Cancer has metastases, which are cells f... |
How a credit card works | when you open a credit card you're given a credit limit. lets say this credit limit if $500. that means that at any time the company is willing to loan you up to $500 at any time, and it doesn't necessarily have to be for 1 purchase, but you can have $500 out at one time. now since you've taken some money out you're ev... |
why does Kim Jong Un and the Kim dynasty keep their people secluded? | Everyone knows that there are huge problems in North Korea, such as people starving, poor access to electricity, and a lack of education. The only way to maintain that kind of status quo is to make sure that people don't know what the outside world has to offer. The Kim regime is able to live a very good life while mos... |
Here is the karma tracking of a popular post on a popular subreddit. What causes the "sawtooth" effect, where there are sudden drops every so often? | It seems to happen every hour about 435/535/635 etc. Based on that i would say it likely thats when reddit updates or some other factor like that is when the karma statistics update for this particular post It might be different times for different posts if so if you run the same report for other post see if they all s... |
Why is bad food good and good food bad? | I always thought that we prefer foods that are high in salt, sugar, fats, etc because those things are harder to come by in the natural world. That is, in a long prehistoric context, if we spend all our time grubbing for edible roots and worms, then come across a sweet berry bush, we're going to gorge on the berries to... |
Why do our bodies itch even when scratching just makes the problem worse? | But it isn't all bad though, ticks are out where I am at now that it is spring. I had an itch under my arm pit and sure enough there was a small tick, without that itching one might not have have noticed the parasite. Some things might use itching to their advantage but the itch itself is our bodies telling us somethin... |
in regards to cars, I always hear people say "it has to learn my driving style", what exactly is my car learning from me and what changes to what is it making? | They’re just saying some random shit to sound cool and that they have a newer car and aren’t driving it wellIn my opinion, the car isn't really learning anything, but the driver has to get used to how the car handles Some cars have "tight" steering, meaning you don't have to move the steering wheel much to get a reacti... |
Why do water simulations take song long to render? | I believe you're talking about computational fluid dynamics which I'm currently working with. typically programs split the area into lots of very small boxes, this is called a [mesh.] When the program does the calculations it works out the velocity, pressure and temperature of the fluid going into the box and works out... |
It seems like aircraft should be able to up load the black box data to a satellite rather than just relying on the black boxes that may be damaged or lost all together | I won't be surprised if that is actually going to happen in the next 5 years or so. The main problem is costs: * Satellite uplinks are expensive, even more since many luxury airlines started offering internet connections from planes. * Planes would need to be retrofitted with the necessary parts, so both installing cos... |
Robert McNamara and why so many people dislike him | During the Vietnam War, McNamara halted production of the M14 and forced all branches of the service to adopt the M16. He was obsessed with cost and so had the chrome lining eliminated from barrels, ordered the wrong powder for the weapon which caused excessive fouling, and did not issue troops the necessary cleaning k... |
What is a solid state drive, and why is it preferable to a "standard" hard drive? | A SSD uses flash memory, a type of memory that does not lose its contents when turned off. Traditional hard drives use spinning magnetic platters to store data. SSD drives use less power and can read data much faster than hard drives. They are not affected by magnetic fields, at least not ones you'd normally encounter.... |
Why does grunting (supposedly) make us perform better in physical activities | Grunting is common due to exhaling during a lift, which is what your suppose to do. If it's a strenuous lift then most likely you'll be squeezing your core muscles pretty hard which will force more air out of your lungs but it's a balance between not letting all the air out at once but yet keeping the exhale going cons... |
How come when you take pictures/videos of a computer screen, there are dark bands that show up on the camera? | "[Moiré]" The pixels in the camera are trying to capture pixels on a screen. When they get those to a 1:1, 2:1, etc. ratio, you get those weird lines. EDIT: Someone want to explain the downvotes? I'm almost positive this is what OP meansMonitors are constantly refreshing the screen, normally at a rate of 60hz, which is... |
Why can my Galaxy S6 see the light emitted by my Xbox One kinect light? Andy why is it in light purple? | You got it spot on: many phone cameras have chips which are sensitive to Infra red. Try pointing your TV remote at the camera while it's on, and pressing buttons on the remote: you should see the little infra red light flashing. iirc it comes through as a kind of purpley-white colour? If you try and video hot coals, yo... |
Does restless leg syndrome make make you immune to blood clots forming in your legs? | Umm maybe I'm confused about RLS but I was under the impression it's the urge to move your legs, not involuntary leg movements. |
Why is there such variation in Cheez-Its? | I can't explain it but thank God someone else noticed. Every time we go to the grocery store I get mocked by my gf because of my astonishment that there are probably 15 different kinds of freaking Cheez-its. Is this a great Country or what? |
Why do humans sometimes crave bad food (Taco Bell, for example) instead of higher quality, better tasting alternatives (real Mexican food)? | It's about what's in Taco Bell, most importantly, the sugars. Taco Bell usually has stuff in fluffy, floury tortillas, plus the rice and other additives. They are absolutely FILLED with carbohydrates, which your body breaks down into sugars, which your body turns into fuel like the squishy mush engine you are as a hoom... |
Why does college cost so much in the U.S.A? | Because student loans are very easy to get and impossible to get rid of so colleges can keep raising the price and 18 year olds don't know enough to care about debt. |
Why didn't early humans have to boil their water to avoid getting sick? | 1) They did get sick a lot. Cholera was a common plague that killed many throughout history, and dysentery and other illnesses from drinking contaminated water also killed. 2) It was relatively rare for someone to travel more than 20 miles from their homes. That means that they were able to build an immunity to most lo... |
Why do emergency vehicles have so many different siren sounds & How do they know when to use each one ? | I can't speak for others. But I can say that, when I was employed as an EMT, we would use whatever noises we felt like at the moment. On the dashboard, there was a controller device with knob that you could turn to various positions, with amusing names like "Yelp" and "Wail" and "Phaser." Sometimes switching to a diffe... |
How do 3D printers print objects with moving parts, such as gears, that are touching each other at multiple points? | Not all printers are capable of doing this but some are. The ones that are usually have a material that is dissoluble by water. The printer would use multiple materials When it places these parts such as gears, it leaves a small gap that is filled with the dissoluble material. When the print is finished the parts are u... |
The theater to DVD process. | It's not that much of a time-consuming hurdle to overcome. It's rather that the producers or distributers don't want the movie to appear in cinemas and on dvd at the same time because that would take away from the intake of the movie. If some praised movie would be released in cinema and on dvd at the same time, at lea... |
Why does pushing something feels like it requires less effort than pulling something? | It could also be due to how you use your hands. Having to grip something in order to pull puts a lot of strain on wrists and fingers. When we push we don't need to grab onto anything.When pushing you can put your bodys weight to it. Plus your leg muscles work better going forward than backward. |
how speech to text programs work | Speech to text programs use recordings of how you say and what you say to compare to what you will say and turn it into words on the screen. Most programs have a series of sentences and phrases it will have you read to calibrate it. An example would be: "The big brown fox jumps over the gate." Not only does it now some... |
How can I shed so much hair in my brush each day and not go bald? It seems like after washing and brushing, the handfuls of hair would leave me with nothing left. | Because this is asking about a condition you suffer it qualifies as a personal problem according to the sidebar rules. I'm not sure what, if any, subreddit would be better for you, but if you find one that works for you, let me know and I'll edit it into this template so anyone in the future will know, too! Alternative... |
Why "Bees shouldn't be able to fly" and how they do. | It's an urban legend. I think at one point a scientist did a literal "back of the envelope" calculation and got the result that a bumble bee shouldn't be able to generate enough lift. But back of envelope calculations aren't very accurate, he was just making guesses about a lot of the bee properties. Obviously they do ... |
Why is fish excluded in the whole no meat on fridays during lent? | This is the story I heard: back in the day, Catholics had a tradition where they were supposed to give up a luxury on Friday's. For most people, the biggest luxury they had was meat so they would give that up. Since fish was much cheaper, they would use that as a substitute protein for their meals. So over many years "... |
What is different between red and white wine that red wine is best served at room temperature, and white wine is best served chilled? | Many white wines, especially those grown in colder climates , have much higher accidity. That can be overwhelming for the drinker so they're served cold to reduce the intensity of flavour. The less acidic whites and reds can be served at warmer temperatures which increase the intensity of flavour . That being said wine... |
What causes that feeling a split second before your realize you're about to have a very big accident? | Its your fight or flight response. When you sense that you are in danger, your body releases a bunch of chemicals that prepare you to either fight the threat or run away from it. Your get more alert, stronger, faster and more coordinated to facilitate either action. |
Why isn't dairy used in Asian cuisine? | Lactose intolerance. Before we even started to really farm animals, populations split off and were separated geographically. It seems European region peoples tended to keep the gene for later-in-life lactase production, while those in Asia tended to not. Ancient Chinese definitely had cattle and other farm animals that... |
what would've happened if the asteroid didn't greatly affect the dinosaurs and never struck Earth? | Well, it's a pretty safe bet that we wouldn't be here. But that meteor was a huge extinction event - thousands of species were wiped out over a very short time, geologically speaking. They would have lived and developed far longer, some going extinct naturally, some being lost in other extinction events , some maybe su... |
why do my muscles deteriorate when I don't use them if I'm eating enough food to keep them up? | I'll try my best on this as I am not a doctor and just have basic knowledge on the topic. So your body is an incredibly efficient machine. Whenever you work out, new blood vessels form throughout your muscles to help better supply it with O2 and other important resources. Your muscles also grow and get stronger to hand... |
What is stopping someone with insurmountable debt from immigrating to another country and starting over? | Credit companies are transnational? Reminds me of The Town when Ben Afflecks character thinks moving to Florida will get him off the hook for bank robbery chargesMainly the impossibility of being accepted into another country with insurmountable debt.Immigrating is hard. It takes a lot of time, money, and work to go mo... |
Why can't I just lay in bed with my eyes closed for eight hours to get a full nights rest? | Because lying down and just relaxing is different to sleeping. When you fall asleep your level of consciousness changes, the crucial part of sleep appears to be during REM sleep, which itself is only a minor percentage of the time you spend asleep. As far as we know when you are asleep you body is more efficient at rep... |
does juice expire and how? Is it more about the taste goong bad or is it unhealthy to drink juice that has expired a few months ago? | Yes, you aren't the only thing that eats juice. Bacteria for instance will also eat juice, and they will grow in it and crap the results of that consumption where they live. Depending on the type of bacteria, this can result in unpalatable taste, smell, or even unpleasant physical effects.Juice can mold because of the ... |
I realize that I don't like my government that much, and I decide to break away from my country and create a sovereign state. What steps must I make for this to happen? | A state can still be sovereign without recognition, as long as the original state has no ability to project their power within the bounds of your country. In the case of Groklamivlevskanya, the first step is simply declaring your independence. It helps if you don't do this alone, but with a sizable group of people, but... |
Why are Macs so expensive compared to similarly equipped brands such as HP, Dell, Lenovo, etc PCs. | Apple can charge more because people are willing to pay more money. More detail: The apple brand: Modern, quality products, easy-to-use, great service. That is what people associate to Apple products and for these factors they are willing to pay a premium price. The product itself; uses an OS which no other company eve... |
Why does nostalgia feel so good? | Perhaps is rose colored glasses thing. We remember things better than they really were. I mean, think about the best day of your life. When it was happening did you stop to yourself and day "this is the best day of my life, i need to stop and take note of it". Probably you didn't realize it was the best day of your lif... |
How can a host 'fight' or resist a parasite? | There's all sorts of ways an organism can develop to fight parasites. Sickle-cell disease is suspected to be the result of humans adapting to resist malaria. Humans lost most of their hair because it gave parasites fewer places to hide. |
deliberate homelessness - just why? | It's hard to have a definite answer as it's obviously a complicated situation. My guess would be some degree of mental illness . Maybe he feels like a complete failure for failing out if university. I know people who under-performed and was penalized for it and ended up withdrawing in and getting depressed, feeling lik... |
Why are some people night owls? Wasn't it evolutionary beneficial to be an early bird, especially since there was usually no light at night? | Well evolutionarily, we are ok with waking up at odd hours. It kept our early ancestors alive. Have you ever seen the REM cycle of a sleeping person? It comes and goes in waves. High points of dreaming and low points of restlessness. These high and low points give us the ability to be woken up at odd hours in case of d... |
How come I've already heard so much about potential US Republican Presidential Candidates lately but little to nothing about the Democrats? | There are two Democratic candidates that no one really wants to compete with that haven't announced yet. No one wants to compete with a sitting VP if he runs, he has an automatic edge. So until its very clear Biden won't run a lot of Democratic candidates won't consider running. Running against a sitting President, or ... |
Why are humans, a social species, susceptible to social anxiety? | We all usually understand morals and ethics. We aren't just social but we're extreme orderly and organized in what we consider is good or bad. So for social species it only makes to very careful about seeming confident and amicable in our social endeavors. While this is from personal experience, it might still help ans... |
Why does it take a few days to get DNA tests complete for the NY escaped convicts but it takes months to get DNA results in sex crime investigations? | It's just a matter of prioritization. For the backed-up case load it wouldn't make sense to do the new one first. But the escaped fugitives are a priority so they push it to the front of the line. The tests don't actually take long. |
Why do a lot of people from Iceland have the last name that ends in -Son and why do a lot of Croatians have an ending of -ič? | Dunno about the Croatian thing but the Icelandic thing is a traditional way of naming people. Boys are named with their father's name and "-sson" at the end. Women are similar but it is the mother's name and "-dottir". So it would be like Ed Johnsson = Ed John's Son and Mary Janesdottir = Mary Jane's DaughterLike many ... |
- how is it allowable to not count every vote in the primary elections, when in the general elections re-counts are a must have? | The parties are private organizations. The primaries are internal events that they use to select who will be their candidate. It is not an official part of the election process. Because it is a private organization choosing its own representative they are not even required to have a vote at all. They choose to do so as... |
Why do sewers and tailors get so mad if you use their scissors to cut anything but cloth, including paper? | Paper like wood has silica in it which is hard relative to steel so it dulls blades much faster than cloth and scissors sharpening is complicated and more expensive than knife sharpeningSpeaking in a more general sense, if I specifically asked anyone to not use something I owned for any reason and then they went ahead ... |
Despite Africa being the cradle of civilization, why it was left behind in progress? | You might mean "the cradle of humanity", rather than of civilization, as the earliest advanced hominids are found there. If so, why was Africa still primitive compared to the rest? A big part of it is water. The biggest earlier empires that indulged in great expansionism generally had excellent access to transportation... |
How is the human body not starved after 12+ hours after sleeping? | "Starved" is not really the term to use here, the human body can go quite a long time on its internal resources. Not happily mind you, but "starving" takes days and weeks, not hours. What you mean to ask is why aren't we "hungry" after 12+ hours sleeping and the answer is - you are. Even if you don't wake up feeling it... |
Why does the audio of a video that has been increased in speed get progressively high pitched? | Because that's exactly what higher pitch is. Faster sound. Sound is a wave of pressure in the air and the frequency of that wave is what determines the pitch. Frequency is how often a wave completes a full cycle. For example, [this tone] has a frequency of 400Hz, which means it causes the air to compress and expand 400... |
how does the rearview mirror work in my car when I push that lever forwards and back when someone's lights are blinding me? | The glass part of the mirror is a triangle-shaped wedge of glass that is thicker at the top than at the bottom. The entire mirror assembly has two reflections , and because the glass isn't parallel with the mirror, the two reflections can be seen from different angles. When you flip the lever, it repositions the mirror... |
What is happening on a elemental scale when a fetus is developing? | Absolutely nothing; ordinary chemical reactions do not really affect the individual atoms, and human body is incapable of fission or fusion. The fetus has to be composed of the matter eaten by the mother. That's why, if the balance of micro and macroelements is deviated from, you risk getting one wrecked fetus.At an at... |
How are there people who cant dream? | There are no such people. Many people, however, can't remember their dreams. Use the Search function here in ELI5 to see many posts on not remembering dreams.> If dreams are brought on from focusing thought while you sleep, They are not. Dreams are a side-effect of your brain processing memories. There's no "focus" on ... |
If a day is actually 23 hours 56 minutes and 4.1 seconds long, how does a clock, that measures a 24 hour period, not lag behind about 4 minutes with each passing day? | The Earth completes one rotation in 23 hours, 56 minutes, and we call this a "sidereal day." It's the time it takes for any given star to travel around the sky exactly once. But what most people mean when they say a "day" is the solar day, the time it takes the sun to travel around the sky exactly once, which is 24 hou... |
why is it that when we get really hungry/haven't eaten in a while food no longer seems apetizing? | After you've run through the carbs in your bloodstream you revert to 'starvation mode' when your body begins to convert fat into usable energy. In order to make this manageable your brain shuts down the digestive tract and you are no longer 'hungry'. Right after you run out of carbs you get very, very hungry. A few hou... |
How do women "synch" up during that time | It doesn't really happen. People *think* it happens because they'll notice when everyone is in sync. In reality, most women have a cycle that's pretty close, but not exactly, 28 days & runs for a week. This gives a lot of room for overlap. Also, since you've got a bunch of cyclical things with a similar period, eventua... |
How do people die from a broken heart? | "Broken Heart syndrome" is often a poetic description of a number of different clinical ailments that can result from emotional stress. You're heart does not literally "break" due to physical or emotional trauma. That said, over the course of time your heart can undergo much traumatic damage from emotional sources like... |
What does the United States and Canada do differently that their immigrants are assimilated easier and quicker? | Well, times have changed. In 1800-1950's the majority of US immigrants wanted to assimilate. It was important to them to learn English and learn the laws/rules/morays of the US. Many of them still kept their native customs, but they didn't expect to come to American and NOT have to learn new things. Now the laws/rules/... |
When I look at lights, then look away and blink rapidly, I can see the shape of the lights in my line of vision for seconds after? | It's a phenomena called photobleaching. The photoreceptors in your retina, the cells that sense light, are like little batteries filled with light-sensitive proteins. When light hits the photoreceptor, some of those proteins undergo a reaction that starts the signal to your nerves that detect light. If the light is bri... |
At what point does the atmosphere turn into space and become a vacuum? | It's a gradual process, the Earth's atmosphere getting less and less dense with height. For each 17 km of height gained, the atmosphere becomes 1/10th as dense. The 'official' boundary of space, for records and legal uses, is 100 km up. This is approximately the height at which an aircraft could not create enough lift ... |
If you hold one of those soy sauce bottles that seems to be at every asian restaurant upside down, would the sauce come out of both sides of the cap? | Probably not at once. Air has to enter container somehow, and the holes are too small to allow air and sauce to flow. |
What is happening when we "get chills" listening to a song or watching a performance? | ELI5 whats happening when i get the chills when i pee', "From what I learned on the old thread, one theory is that the chills/goosebumps are the natural response to fear. Since humans like and respond to patterns, for a song to take an unusual drop, or for a dj to mix songs into something you've never experienced befor... |
With how easy it is to remain anonymous on the internet, how does the government keep the identities of juvenile criminals a secret? | The only reason most criminals are known is because information is published about them. News is released to the media, their cases appear in public dockets, pictures might be published for juveniles, the police and courts just don't put that information out there. |
Why can shows like To Catch a Predator air pedophiles being caught without their consent? | _URL_0_ The short version is they were recorded during a sting operation in which police were informed of the show's activities. You have no expectation of privacy during the commission of a crime in most jurisdictions. Local law varies, though. |
Why do wild big cats (Lions, Cheetas, Leopards) do not attack people inside vehicles? | Why is that? They dont view a van or people in the van as food or as a threat. Thus they aren't going to wast their energy trying to attack you. |
Why do world records get broken more often at the Olympic games? shouldn't they have a roughly equal chance of being broken during any of the events in between? | One way isn't actually by breaking the record, it's by presenting an alternate set of records as "Olympic Records". This artificially increases the importance of events where you can break the actual "World Record", but also the "Olympic Record", if it's weaker. This gives the impression that there are more record-sett... |
Why do we have different countries with left handed drive and others on the opposite side? | I can't speak for all the world, but Napoleon was left handed and made the French and any country he invaded ride on the right side of the road so that his sword arm is facing the oncoming rider, which is why continental Europe drive on the right and Britain on the left. Supposedly |
What makes one person more flexible than the other | Many factors but it all stems down to the Central Nervous System . The CNS is kinda like the police of what our bodies can and can't do, if it "thinks" something is risky such as trying to touch your toes it won't allow you to do it, someone else might be able to push on your back to allow you to do it but you physical... |
Why do people get attached to things that we name? | When you name something, it goes from being distant and inhuman to being personal and human. The same reason bad guys in movies usually wear masks or helmets, humanizing something makes it harder to dislikeBecause we humanize an inanimate object. And in our life the biggest things we lose are other humans. |
Why do we like some smells that are foul? | Foul to who? Who is we? There is expensive perfume that I think smells foul when I have smelled it on people. I don't say it out loud. It's my opinion. People have different tastes. |
What are the legal benefits of marriage? | Off the top of my head: * Shared medical insurance. This is especially important if one spouse doesn't have insurance and the other does* Possible tax savings by filing jointly* Automatic inheritance in case of death, even without a will* Visitation rights in the hospital* Being able to make medical decisions for spous... |
Why does amphetamine or meth abuse make people paranoid? | It overstimulates your mind. A very important job for your mind is to stay alert and look out for dangers. When overstimulated you will see dangers that arent real. |
what difference is there between the brain of a heterosexual and a homosexual if any? | [Brain Study Shows Differences Between Gays, Straights] This article gives some good info on the subject, but there is far more research to be done. I can't really ELI5 it that well, but I think the article is written in laymen terms enough you'll be able to follow.Not in a "hard" way, in the sense that brain scans wou... |
(UK politics) Why is there so much controvesy about Labour Leader Ed Milliband? | Many expected his brother David to win the labour leadership election but Union support favoured Ed. So a disconnect between those with the power to decide who the labour leader is and the people that vote in the general election.Specifically regarding the recent Guardian article you link to, there is a feeling amongst... |
How does coloring of black and white or old movies work? | I think there have been many different ways of doing it. Obviously it's possible to take each frame of the movie and paint the appropriate color onto it. But it seems lately as technology has advanced, computers are able to discern objects among many frames, so someone can say "paint this object red" and it'll know whe... |
Why are political views and parties called left/right wing? | This goes back to the French Revolution. Before the revolution, members from different classes would very occasionally meet when called by the king to advise him. The assembly of the different classes was called the *Estates General*. The king called a meeting of the Estates General shortly before the revolution. Those... |
Why do certain words trigger a seemingly unrelated emotion? | This sounds like pretty standard affect heuristic. You 've encountered these words in undesirable situations and your brain now makes a mental shortcut to brace for an undesirable situation when you hear the words. You 've also bundled corporate lingo into one category and are simply adding new words to that category f... |
Why do dogs and cats enjoy getting their belly's rubbed | Many animals enjoy physical contact from others that they trust. For example, some cats will come up and rub their face into yours. Dogs may jump on you and start licking you. If an animal lets you rub their belly, it shows that they trust you and that they enjoy your touch. A feral cat or dog probably isn't going to l... |
Why are the motors used in kitchen blenders still so noisy in an age when you can barely hear an electric car? | A few reasons: 1) they're cheaply made2) they don't have good cooling so they are exposed to exterior air for cooling 3) very expensive blenders can be quieter, but they aren't what you'd buy at the store normally. |
How can one tap the undersea cables with a submarine? | I saved this for while to see if you'd get any responses. It is as /u/Spinnnn says for wirelines. An induction clamp is placed over the cable that reads the magnetic changes in the cable. Operation Ivy Bells was the first iteration, and had some limitations that needed to be hashed out. While it did work, it recorded o... |
Why are southern Californian counties so large compared to northern Californian counties? | California originally had 27 counties. New counties were formed out of old ones as populations rose in the years after statehood. With most of Southern California being desert, there weren't many people there to support forming new counties out of the original large counties. The last time a new county was formed in Ca... |
Molotov cocktail - Why the fire does not go inside the bottle? | because the fuel vapour from being defused from the wick is being burnt, not the liquid fuel in the bottleFlame may be ingested into the bottle momentarily but it quickly burns out by consuming the oxygen inside.The goal of a Molotov cocktail is to set some particular target on fire. A flammable liquid is contained ins... |
If a couple have a baby and the father is quite dark, the mother quite fair, how on Earth does the baby end up being lighter skinned than the mother and father? | Genetics is fully weird. Exactly what genes you get is basically random chance, and then there are a ton of factors that play into how the genes get expressed. So it's entirely possible that your father had some genes for fair skin in his genetic makeup that were for one reason or another not being expressed or were ov... |
How come text on websites doesn't ever affect the website's code? | Special characters and input scrubbing. First, whatever application you are typing code into has to be programmed to recognize special characters and change them into something else to prevent exactly you are talking about. For example, the < and > in your post aren't really < and > . If you look at the source code of ... |
How did the first bilingual person learn a different language? | It's possible to learn a language by completely immersing yourself in it. When you think about it, that's sort of what a newborn has to do to learn his or her first language. If you move to a country with a different language, you will eventually figure it out without formal education. |
The difference between decriminalization and legalization (of marijuana) | Illegal: You can be arrested for selling or using marijuana. Decriminalization: You can get a fine for selling or using marijuana, but it's not going to show up on your criminal record. Legalization: Marijuana can be sold or used in a manner similar to tobacco or alcohol. |
How does the body know when to wake up from sleeping? | We are all subject to a circadian rhythm which dictates our sleep timings. A couple of factors include exposure to light and our body's release of supplement called melatonin. Many babies, for example, are naturally nocturnal. That is why parents have to sleep train them. After that, they will typically get tired and w... |
How can a car with a V6 engine (such as a Nissan GTR) outperform a car with a V10 engine like an Audi R8 V10 plus? | The gt-r had two turbos which, driven by exhaust gases, force feed air into the engine this making more power torque etc. these turbos spin at a high rate which is a little more efficient than the sheer displacement of the v10.I'm not that familiar with either of those two cars, and I don't have time now to check the f... |
What exactly is a Jehovah's Witness? | Ex-JW here. It's a Christian religion , however, they do not follow the nicene creed, meaning they do not believe in the trinity, whereas most other major Christian religions do. They also have a lot of doctrines that make them stand out from other churches for example: - They do not celebrate birthdays. Their reasonin... |
With all the hate of the current giants of the internet/cable industry, what's to stop someone from creating a new internet and cable company that actually gives decent service and speeds? | Reason number one, it requires a massive investment. What these companies have is not some cables connecting cities and some servers on a cloud. What they have is physical wire going to each and every one of millions of customers. This takes billions of dollars, many years, and the good will of many levels of governmen... |
Why do very high-pitched sounds make me feel the beginnings of a headache? | It is evolutional that we feel uncomfortable when hearing high pitched sounds it "reminds" us of the alarming, warning sounds monkeys make when danger comes up. Stress or uncomfortable things can make us get a headache. |
The difference between Crows, Ravens, and Blackbirds | Common naming conventions for well known species are a bit of a mess because we retain their historical names that don't really reflect their genetic relationships. Technically a Crow is any member of the corvus genus, which means that the Ravens are Crows as well. There are quite a few types of crows and ravens, so co... |
Why does the US add at least 10% ethanol to petrol when it decreases fuel economy and in slightly older engines, longivity? | The carbon in corn is from CO2 in the atmosphere, so burning ethanol from corn is technically carbon neutral. But mostly government subsidies. |
Why is the inside of the palms always white regardless the skin color or tan? | Melanin which colours the skin is in the lower layers of the skin, the skin on the soles of the feet and the palms of the hands needs to be substantially thicker to protect from wear and damage so there is no melanin close enough to the surface to darken those areasAlso, if I remember my anatomy and physiology correctl... |
how the hell does this pay-to-play pool table know whether or not you scratched? | It could sort by size, or perhaps by weight. If the cue ball is slightly smaller than the others, there would be a hole just big enough for the cue ball along the chute that the balls travel. If it's a weight difference, the cue ball would either be lighter , or heavier . |
why can’t aluminum foil burn under just an open flame? | Aluminum is not flammable. When it reacts with oxygen , the aluminum oxide quickly forms a protective coating just a few molecules thick, protecting the rest of the aluminum. |
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