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Why is paper used to substitute plastic (such as paper bags, paper cups, paper straws etc.) if it costs our trees? Is it more eco friendly?
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Those things are usually recycled from old paper products, so it rarely costs our trees, or at least use less trees . The production of wood- and paper-based products have a much lower economic impact than oil-based products, and the perhaps less arguable reason being that wood is a relatively limitless source, as we can grow more trees, whereas once we're out of oil, we can't make more, so that would be no more plastic, rubber, etc.Trees are a renewable resource. New ones can be planted and grown to replace the ones harvested for human use. Additionally paper is biodegradable and does not poison the environment when it decays the way that plastic does. So yes, it is eco-friendly.Like others have said, trees can be replaced. Plastic is made from oil which can't. Also, paper can be made from other plants, such as bamboo and hemp, which grow much faster than trees meaning they are even more renewable & sustainable.The paper products came before. Plastic came in because it was more durable and we were on a save the trees kick back then.
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If marbling of the meat determines its quality, why do people trim off the fat?
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It's like saying: If you like butter on your toast, why don't you just eat a stick of butter?
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the Boeing 737 Max uses a computer to 'fly against nature'. What does this mean?
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A ball in a valley is a simple example of a stable system. If you move the ball, the ball returns to the original position without further effort. A simple example of an unstable system is a ball on the top of a mound. It may sit still, but the first wind or vibration and it will be quite hard to keep on top of the hill. An unstable system is one where a small error is easily overcorrected, then overcorrected the other way, and so on until the error becomes very large. Many times an unstable system can be made lighter so faster or more fuel efficient than a stable one, but essentially impossible to control . However a computer can be more precise than a person , allowing the designer to use a less stable system and reap the benefits of the unstable system without incurring the cost of having a system that's impossible to control.
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If the Gregorian Calender we use today only took effect in the 16th century, how does this impact the accuracy of dated historical events prior to then?
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If you are posting from the UK or former British possessions , the Gregorian calendar didn't take effect until 1752, when the Calendar Act of 1750 went into effect . The change really doesn't affect the accuracy of events, *as long as you know the calendar the original writer is using*. For example, Dutch sources record William of Orange left to invade England on November 13th, 1688. English sources record his landing two days later on November 5th. This is easy to reconcile when you know the English were still using the Julian calendar. Sometimes you might, say, have an Englishman writing in Holland, and it might be unclear. A similar problem comes from the New Year change. An English baby might be born on December 29th, 1725, and christened on January 2nd, 1725. Whereas a Scottish child, born and christened on exactly the same days, would be christened in 1726. You might see the date written as January 2nd, 1725/26, which gives both Old Style and New Style dates.
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Why do milk jugs in the US invariably leak from their cap, but not other liquids?
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The plastic bottles in Canada leak too. It drives me insane and it's a major factor why i never get plastic milk jugs bagged.
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Why do people use the color 'green' for greenscreen and not any other color?
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Because it doesn't conflict with various skin tones or natural hair color. This article explains it well._URL_0_ have a read.They use different colors based on what they are trying to film. But green is because there is not much green in humans. :P', "The greenscreen is for something called Chroma Key. Where they edit out anything that has that exact color. There are three primary colors. Red, Blue, and Green. Human skin has a slight reddish tint, but contains very little blue or green, so they don't use red. Blue screens do exist, and infact predate the green screen. The switch mainly had to do with alot more people wearing blue than green.On digital camera green as an advantage, since the human eye is more sensible to green the grid for the colour on the sensor most often has a pattern that gives the green data twice the resolution than the blue and red channels. Which allows for a cleaner chroma keyingI saw blue and purple. It should not be used in other parts of the picture.
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How do vehicles detect how far you can go on your current amount of gas? Wouldn’t sensors not work due to the gas sloshing around?
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Through averaging. The computer in the car keeps track of exactly how much gas the engine has been using, and it also keeps track of how much the car has traveled. With this information, the computer calculates an average of how many miles the car can travel for every gallon of gas it uses. The fuel tank sensor doesn't tell the computer how many gallons are left inside the tank. Instead it gives it a fractional reading of how full it is. This doesn't really affect it much because the computer knows approximately how much gas fits inside the tank at full, and it makes an approximate calculation of how many gallons are left in it. If you know how many miles the car may travel with one gallon of gas, and approximately how many gallons are left in the tank, then it's relatively simple to make an approximation of how far it can travel with the amount of gas left. Keep in mind that there are other factors that can affect these calculatuons, so those numbers could sometimes be off, and sometimes be dead nuts.
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What in electricity gives you power?
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Power = current * voltage So, a light bulb filament glows because it's very hot. The power used to heat the filament is determined by the current multiplied by the voltage dropped across the filament. The resistance is how hard it is for electricity to push through the filament, and the current is how much electricity pushes through anyway. If there's no resistance or no current, there's no energy lost in the filamant, so no power used, both together use power. Lets say it's a 100w bulb on 120v. 100W/120V = 0.833A. Ok, how do we know what resistance we need to get that? Well, V=IR, so 120v / 0.833 A = 144 ohms. It's actually a bit more complicated when we're talking about AC, but I doubt your teacher covered RMS voltage today.Electricity is just electrons. Volt is how much power each electron has and amps is how many electrons are in a wire.
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How is Pi programmed into calculators?
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When calculators require the ability to determine Pi beyond a programmed precision, they can use _URL_0_ and the power series for arctan to quickly compute hundreds of digits, should the need exist. However most calculators don't have this programmed in, they just have a fixed value which is Pi to as many decimal places as the calculator can display, sometimes plus up to 4 more.
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Why are there always a bunch of super long infomercials on tv only at hours when no one would be watching tv?
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It doesn't cost the television station much to broadcast a signal. What costs more is creating content or licensing content . If the TV station does not think they will make enough money selling commericals to make up for the costs of creating or licensing the content, then they'll sell the entire block of time to the advertisers and let them fill it up with a big long commericial. The cost of generating the ad is all on them and the station just does the broadcasting.
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Why use essential oils?
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you shouldn't use essential oils. They don't work. It is not really any more controversial, than homeopathy, chiropracty or any other type of snake oil. Some people think it works, but they are wrong. This is not the type of thing where there are two sides of an issue. There are frauds who tell you that they can heal diseases and their victims and then there are people who actually know what they are talking about. With essential oils the whole scam gets compounded by the fact that one of the main vectors for this fake medicine to spread is though pyramid schemes which makes idiots who fall for it deeply financially invested in sharing their misery. Since the whole thing isn't real medicine and isn't regulated, in addition to not working it might actually make you sick because who knows what the scammers put in there.Scents indubitably affect your mood. Perhaps there is a deeper effect on the psyche, but afaik, that is not properly proven. The idea that aromatic oils are healing anything physical is mostly hogwash. In science and espc. in medicine, the battle cry is: PROVE IT! And very much in medicine: If you can not prove it, HOW THE FUCK DARE YOU CLAIM IT? Prove, as in properly randomized double blind row test with peer review. Gold standard stuff. Would you accept anything from Pfitzer based on their mere assurances that it works, garnished with some wellness-speak? No? Then why on earth would you accept it from anyone else?--------- To come back to the beginning: They DO alter moods, Ylang-ylang helped me with anxiety during my divorce.Smell is the only unfiltered sense we have, it reaches right into our emotional and memory _URL_0_ probably is our oldest sense, before light sensitivity, there was chemical sensitivity.But aromatic oils are not magical. See a doctor Some of them do have an effect on the body. They can subtly alter your mood or help you relax and fall asleep, or manage mild symptoms of cold, stuff like that.
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Pi was recently calculated to the 31 trillion digit by Google employee Emma Iwao. Is there any benefit to calculating pi more and more accurately?
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From what i saw in another thread 'no'. I think they said NASA only uses pi to 14 decimal points so if they don't need it longer most math won't either.
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Why do radioactive materials decay at a predictable half-life yet there’s no way to know when one molecule will decay?
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Imagine you are draining water from a large water tank. You can predict using the flow rate, when you will get to half a tank of water. But you would not be able to predict when one particular molecule in the water gets out of the tank. Or consider flipping a coin 10000 times. You will more or less get it correct if you guess that you'll get 5000 heads but for any one flip, you'd still only have a 50/50 chance of getting a heads.
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why aren't there any small sea mammals?
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There is minor reasons like needing to be a certain size to have enough insulation to stay warm. There is fresh water stuff like platypuses and beavers that are pretty small. etc. I think the real reason though is there just aren't many mammals that make the jump to sea living. All the sea mammals all basically descend from one of four creatures, so there just isn't tons and tons of variation. There is probably tons of viable forms that would work but if you aren't a whale or a manatee or a seal/walrus or an otter you just aren't represented. For whatever reason sea living is not something that is frequently evolved into period. lots of stuff that could work just didn't happen to happen.There are otters, which are closer to a small-medium dog in size. The problem is insulation though. Otters have fur in those nice points and have to groom themselves constantly to keep the water away from their skin . Most other marine mammals have a lot of fat like seals and sea lions
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Why do electronics usually require 2 batteries instead of just one bigger battery? ie: 2 AAA instead of 1 AA.
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TLDR: Batteries are often chosen to optimize size + weight of the device. AA, AAA, C, and D batteries all have the same voltage , the major difference between them is how long they last. The larger the battery the more energy storage it has, so the longer the battery will last. You can replace the batteries in a device with similar batteries that have the same total voltage. So 2x AAA's = 2 x 1.5 = 3 volts. So if a device is powered by 2x AAA's, you can replace them with 2x D's which would make the device run much longer. BUT the catch is those D batteries are huge and would make the device very heavy and cumbersome. The reason most devices run on AA's is size + weight.
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What happens when a compass is in space?
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Your compass points in the 'north' direction of whatever magnetic field it is in. There are actually a lot of very large and strong magnetic fields that exist in space, even far outside our solar system. AGNs have some of the most powerful magnetic fields in the universe. The compass would point in the direction of the field, though, and not towards the source. Because the fields are so large and far reaching, it would most likely appear to just point out into space somewhere.
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Why does Russia seem to have an inordinate amount of big meteor impacts?
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If you look at the distribution of all detected meteor fireball events over the last 30 years, it looks sort of well distributed over the entire globe. [_URL_0_] So Russia doesn't actually have significantly more than anywhere else per unit surface area - but Russia being the largest country by area gives it a larger number of events - but it just so happens that the two biggest reported recent events have happened over Russia. This could have happened entirely by chance.
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Why when driving do objects seem to move slower when seen from the windshield vs seen from a side window.
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Perspective. When you're looking out the front window, you're looking at an object moving at less of a perpendicular angle in your field of vision than from the front. To visualize it a bit o o|
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What would it take for the UK to stay in the EU, and how likely is it?
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There are really two facets to the answer, the legal one and the political one. Legally, all it would take currently is for the UK to revoke its notification under Article 50. It's not clear whether the Government currently has the power to do that under the European Union Act 2017 or if Parliament would need to pass a new act to authorize it, but either way, the UK would just need to formally revoke its notification that it plans to leave. Politically, though, it would take a significant change in the Government's current position. Based on her public statements, the PM appears to believe that she is obligated by the referendum results to take the UK out of the EU one way or another, and thus has not made any statements that indicate she is at all willing to revoke the notification. As far as how likely, nobody knows. The circumstances change day to day, many people in various important positions have lots of incompatible opinions about what the UK should do to get past the current impasse, and the upcoming deadline may cause lots of people to reconsider their stances.
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How is it possible for 2 devices to communicate without wires?! Bluetooth, WiFi, telephone...?!
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All the devices in question have the same thing in common: light. Or rather, electromagnetic radiation, since most light is invisible to humans. Basically, a device that wants to communicate with another device that is not connected to it by a metal wire has two devices: one that is basically a blinking light, and one that can detect the blinking of another light. What this device is depends on the exact properties of the light you're using. Fiber optics use a little diode and a receiver embedded in the chips, while wifi/cellular/radio/bluetooth all use antenna of various sizes, specifically designed to pick up electromagnetic waves of their specific frequency band. Data is encoded into the light in some way. Whether it's turning the light on/off, changing the brightness, or changing the frequency slightly, there is some periodic change applied to the light that the receiver can interpret into meaningful data. In essence, it's vaguely similar to what we do with our eyes when we're watching videos - using light to transmit meaningful data . The exact frequencies, power ranges, encoding methods, etc. all vary widely depending on the usage - i.e. wifi has a much higher frequency but much lower power than radio. And fiber optics, rather than sending it through the air, sends light bouncing through a special fiber to ensure it gets where it needs to go.
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If taking ibuprofen reduces your fever, but your body raises it's temperature to fight infection, does ibuprofen reduce your body's ability to fight infection?
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It can, yes. However, the body's thermostat gets wonky during a fever, and it's entirely possible to get so hot that your body actually starts to hurt itself from its own heat more than the infection itself. At that point, taking ibuprofen might help. I'm not a doctor, though. Whenever you have a fever, it is always wise to call your doctor to determine if taking fever-reducing medication is right given your circumstances.
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How do you work out the combined probability of 2 events? (Presuming I know the probability of both)
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Generally speaking, you multiply them as indicated in the other posts. However, this only holds for independent events. For example, let's assume that the sun is never out when it rains. If it rains 50% of the time, and the sun is not out 50% of the time, then the probability of it raining and the sun not being out is NOT .5 x .5 = .25 = 25%. This is because there is a conditional probability between the sun and raining .You multiply them. So if one event has a probability of .25 and the other a probability of .5, then the probability of both events occurring is .125.
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When two pieces of a broken bone begin to heal and bond back together, is the bond stiff, but brittle, or is it more like a glue, slowly getting thicker and stickier?
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It depends on your bone health. It's not so much stronger as it is denser, this could mean stronger, but it could also become a structrual weak point. Depends on the break. As for the bond it should be more like it was welded, new bone regenerates and fuses, that or cracks fill in with new bone.
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If we can see cells with a microscope, why can’t we just keep adding lenses/magnification to see atoms fairly clearly (with electrons etc.)?
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Light is made out of teeny tiny things called photons. We see things when photons bounce off of them and land on the retinas of our eyes. Photons are really really small, but there are lots of things in the universe that are even smaller, like atoms and electrons. When we try to look at these super-small things by bouncing much-larger photons off them, it doesn't work so well. We can add lenses, but no matter how many times we magnify the image, it's still fuzzy because the photons are bigger than the things we're trying to look at, and we can't hit just one atom or electron without hitting all of its neighbors. That's why there are other types of microscopes that work by bouncing even smaller things, like electrons, off of the subject. We can't see electrons, but an electron microscope uses electronic circuits to sense their bounces and make an image on a screen, which we *can* see.
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Is there any scientific basis for horoscopes?
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What other people said, with the only addition that as it corresponds to a birth month, there's the POTENTIAL for shared environmental factors as a result of birth month. In a modern society where our diets are fairly standard year-round it's less prevalent, however it's possible that in the past things such as the availability of fresh fruits and vegetables only during certain times of the year may have had unknown impacts on children based on prenatal nutrition. In the modern day United States, most states have grade cutoffs for kindergarten based on being age 5 in either august, September, or October, so children born in November may be 11 months older than some of their peers, which may have various developmental side effects related to a child's education and social environment. That being said, that's less to say that any of this would have any of the specific attributes associated with various birth signs. I was mostly pointing out the actual ways in which different signs/birth months MAY alter a person and MAY provide for some POSSIBLY statistically significant differences between those born in different months. Edit: Typo
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Why are we are all bothered by disclosure of App permissions on mobile phones but not by softwares on Windows by developors?
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Because people take their phones with them everywhere they go. It has more intimate access to people's personal lives generally speaking, theres a lot of sensitive data exchanged.
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How was the exact value of pi ever determined?
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One of my pet peeves is the idea that pi can't be defined exactly. It can. Pi has an exact, unambiguous value. There is and can be no disagreement as to what the value is. It's true that you can't write down all the digits of pi. It's also true that you can't write all of the digits of 1/3 — no matter how many digits you write down, you will never have written every digit. This doesn't mean that 1/3 is somehow mysterious or unknowable, it just means that it's not compatible with our favorite way of writing down numbers. Of course, pi really is less “writable” in some ways. You can write down all the digits of 1/3 if you use a different number base; or you can write a simple arithmetic expression with the exact value of 1/3. There is no simple arithmetic expression that equals pi. But there are more complicated expressions that exactly equal pi. You're asking about decimal accuracy. There are various formulas and algorithms to compute as many digits of pi as you like. Most often, they work using an approximation — a closed-form arithmetic expression that is very close to pi, and that can always be extended a little to become even closer to pi. We know that these are reliable because we can prove that the difference between a certain approximation and pi is small enough that a certain number of leading digits must be the same.
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If we can’t see atoms, electrons, quarks... How did we knew that matter is composed by those things and what it seemed like ?
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You are right, in a way, we indeed don't know if matter is composed of those things. We can't see them like we see a tea spoon on a table. But then, why do we say that is the way it is? Well, that's a shorthand to say: if you assume matter is this way, I have this theory here that say LASER is possible, nuclear fission powerplants should produce energy, the sun energy production should be this amount, etc Now, people are going to say, yeah, right that's completely convoluted and unrealistic and I will show you how wrong you are. Then they build a crazy particle accelerator to smash atoms together and it is indeed showing all those expected crazy behaviors. So, until somebody find something unexplainable in that theory, we can't really disprove it. But you can build new theories where particles don't exist but you have vibrating strings in 11 dimensions and matter is just the shadow of those strings on a 4 dimension space-time. Physics is not the search for what truly is , but for understanding the universe and using it to cheat our ways out of our own limitations.
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Why do almost all FM radio frequencies have an odd decimal value? For example: 100.3, 91.5, 101.1
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The fact that they are 0.2 apart is because of the way radio works. It's like lines of text: you need to have the text be a certain size so you can read it. If you make it smaller, it's harder to read . You can put the lines closer together but if you get too close then it's hard to read. Ideally, the lines of text are in perfectly straight lines, but radio gets wiggled by the air, and radios don't read the radio waves perfectly either So if you imaging trying to read text that's kind of wiggly up and down on the page, and if you're an old radio, you're also shaking the paper, it would be much easier if the text was big and there were was a big gap between lines. If it were all perfectly aligned, radio could be fit as close as 0.04 apart but that would be like reading text where each line touches the next; if you add in the wiggly printing and shaking the paper, you'd often read the wrong thing. So they give the sound 0.1 MHz width or so to make it big enough to read, and then they give a gap of 0.1 MHz between each line of text so when it's distorted, it's still readable. In other countries, radio stations are on even numbers instead.
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Why does breathing become more difficult once we start focusing on breathing?
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There's the bit of the brain you talk to, and the bit of the brain you don't talk to. The second guy is the one who normally handles breathing. Sometimes breathing talks to the first guy. Then first guy talks to you like that drunk guy at the bar who will not SHUT UP about this fun girl they met five minutes ago on the next table.
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Why can’t we die just by holding our breath ?
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Voluntarily holding your breath will eventually lower the oxygen content of arterial blood. Although breathing is normally regulated by blood CO2 levels, after prolonged, deliberate breath-holding that feeling of extreme urgency to breathe is due to hypoxia. Eventually you lose consciousness as the brain loses oxygen, so you simply stop holding your breath. Some of your deepest and most powerful reflexes, originating in the brainstem common to all vertebrates, are for breathing. Indeed patients under general anesthesia are often allowed to breathe spontaneously even though completely unconscious. So if you pass out from hypoxia you immediately begin breathing again, keeping you from dying. That's the happy version. While hypoxic, meanwhile, you are at risk from cardiac arrhythmias or brain seizures, either of which can potentially cause sudden death. When you lose consciousness you may fatally strike your head or break your neck. Once fallen, you might obstruct your airway and stop breathing despite the diaphragm contracting, which could rapidly lead to death given that you were already hypoxic before obstructing. To say nothing of opioids or other drugs that inhibit the normal ventilatory drive, which is why people often die from opioid overdoses. If you deliberately hold your breath to the point of passing out, after taking prescription pain pills or even after one drink of alcohol, then I'd say all bets are off about low risk of fatality for such a stunt.
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Why don’t we wake ourselves up when we snore?
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If it's bad, we do. The disturbance, and the interruption in breathing often do wake people up, or pull them out of deep sleep into one of the higher stages. It's called sleep apnea.
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Are we ABSOLUTELY sure or PRETTY sure that nothing can outspeed light?
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As is the case with every theory, it's not 100% infallible. However, we do have VERY STRONG EXPERIMENTAL EVIDENCE that confirms this theory in multiple and diverse ways. It's always possible that some experimental data will contradict this theory, and the theory will need to be revised. Possible, but not very likely.
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how do scientist distinguish between correlation and causation on unethical studies? For example to determine the causation on cancerous substances when no ethnic commit would allow direct human trials
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One way is to rule out other things that would explain the correlation. For instance, if I invent an arthritis drug and it seems like people who take my drug have a lot of hip fractures, I would need to sort out as many explanations as I can. People with arthritis tend to be old, and old people tend to have hip fractures, so what happens if I only compare old people who take my drug to old people who don't? Or better yet, what happens if I only look at people with arthritis? And there are a lot more factors that could be examined in isolation as well, from sex to location to wealth, all of which might make a difference. The other way is to test in non-humans. Does this substance cause cancer in other animals? Just mice and rats, or other species too? What is it doing? Does it cause DNA damage or inflammation? Does it disrupt cell replication? Does it damage the liver's ability to break down foreign molecules? If it does any of these thing in animals in a way that would work the same in humans, then I can be confident it's a probable carcinogen.
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How is data sent to one cell phone, not all cell phones connected to the same tower
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I'll try to make this as simple as possible. Your phone has a code waveform. This is unique to your phone. Signals are broadcast as another waveform. To recover the data, your phone multiplies the signals with the code waveform. The signal intended for you is the only waveform that isn't orthogonal to your code. The result is every other waveform multiplies to 0, whereas your waveform multiplies to a data signal. > My interest in this stems from privacy concerns, would it be possible for a user to see the data I am sending to a cell tower? Yes, cell towers snoop your data. We can talk about encryption & hypothetical workarounds; but this is what is actually happening today.
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When a phone has no signal, how can it still make an emergency call?
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Some GSM phones on some networks don't need a SIM card to make a 911 call. It might look like you have no network signal from your carrier, but some kind of signal does need to be able to get out and reach a tower.
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why is it necessary to shoe and maintain shoeing horses, but wild ones are fine?
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Two elements here; wild ones don't walk on the hard road surfaces and other conditions created by human activity. In addition horses have evolved to live in relatively dry steppe conditions, when they live in the wetter climates the hoof becomes softer and can rot with all the water so needs protection, horses on the steppe don't normally require shoeing.Wild horses don’t usually spend their days with loads on the rod back and walking a lot on hard stone/paved roads.
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How do hatmakers turn cotton fabric into a semi-rigid, leather-like hat?
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*From what I remember so possibly incorrect in details:* Fur-felt is extruded and dampened and then shrunk and dried into finished form . It's at that point quite a dense compacted material. Also from memory - hats can get weird if wet, almost positive non-synthetic modern hats are waterproofed/sprayed. I know there are fixers like a hat-starch. It'd be interesting to see what the knowledgeable answer is to this one, I looked it up once trying to find out what mercury was used for in the hat process, seems it's slightly superfluous.
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why we cry when feeling intense emotions
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I'm not a scientist and I'm hella late but I remember reading that humans learned to cry so they could express emotional distress before they had the ability to speak so they could get help and comfort if they needed it.Tears may be similar or identical in composition to cerebro-spinal fluid. Tears released due to emotion may be high in chloride for the purpose of depriving the central nervous system - and particularly the cerebellum - of ions. By this means the hippocampus and similar emotion-regulators may limit the internal manifestations of emotions, while signalling to others that there may be a cause for tears, and/or that support may be beneficial.And side question: is it bad if you never cry no matter how sad something is? Like my dad passed and I did not feel too sad or cry. In fact I don't even remember the last time I ever cried. I probably haven't cried in over a decade. And my life is pretty shitty but I never cried about it.
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Does a joint's ability to be cracked say anything about the health of the joint?
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I had my joints crack for years now, but 4-5 years ago I developed a rare bone disease & chronic joint + bone marrow inflammation. Is me cracking my joints left & right by just walking or standing fine when it doesn't cause pain?
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Why is it so satisfying to rub your eyes and why is it so difficult to stop?
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Havent happened to me in quite a time. I think that irritants go into your eye when you rub them, and then your eye, being a delicate spot, believes that there's something in your eye, making you want to rub it again, and rewards you for doing it, where the good feeling comes, but simply more irritants from your hand go in and it becomes a positive feedback loop. Best thing to do is to wash your hands, wash your face, then resist the urge. It's possible.I have found that washing my hands puts the vicious circle to a close, even when I think my hands are clean if my eyes keep itching when I rub them I clean my hands, that usually puts an end to it
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How does a running start help you jump higher than normal?
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When you run, you're building up kinetic energy. When you slow down and jump, that kinetic energy doesn't go away; conservation of momentum means that it gets redirected into your upward movement.
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Do Doctors really work "24 hour shifts" as is a whole day with only a few breaks, no sleep? If so, does this not make more susceptible to errors?
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Fun fact: resident physicians in the US aren't allowed to work more than 80 hrs a week or for more than 24 hours due to the death of [Libby Zion]. After residency though there is no limit.
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When it comes to music(guitar) what are tabs and why are the looked down upon as a reference?
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Tabs are a simple way to write music, made primarily for the guitar. It basically shows you where to put your fingers rather than what *notes* you should play It's looked down upon by snobs who think they are superior because they can read sheet music, basically. Don't care about what they say, feel free to use Tabs. THAT SAID, if you want to get better, it's good practice to try to learn songs by ear, and if you have the time and want to get more serious about it, it's good to learn the Standard notation. It depends on your goals. If you want to play in an Orchestra, you will have to learn Standard. If you just want to, say, play some Beatles songs or whatever, feel free to ignore that.
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Why did/do countries honor Switzerland’s neutrality in times of war?
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Aside from the fact that every male citizen is required to serve some time in the army and they all get to keep their guns at home? There's little to be gained from physically overrunning the country that you couldn't get more easily by just trading with them. They're hilly ranging to mountainous, and one of the major ways in is via the Alps, which has literally only ever worked for Hannibal. There's nothing on the other side of them that you couldn't just go around them to get. They've also been neutral for so long that nobody has a treaty requiring them to chip in to help an ally under attack, yet attacking the Swiss will piss off everyone else who's making/hiding money by respecting their neutrality. In short, it's not worth messing with the armed and heavily fortified rich kid who has no interest in your outside squabbles.
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Why only plants photosynthesize?
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First there were very simple single-cell creates such as bacteria and the like. Plants evolved from these and via photosynthesis suddenly could capture a lot of energy from the Sun. They even poisoned the planet with oxygen which killed off most of their brothers and sisters who could not photosynthesize. Animals came after and were able to EAT plants and avoid a lot of trouble and effort: why buy the cow/be a plant when you can buy the milk/eat the plants. It's the easier way and evolution always favors easy that gives an advantage.Plants and other photosynthesizers have way less energy demanding metabolisms than other organisms. Photosynthesis is a very slow drip of energy that only adequately meets the energy needs of something that operates on a very long time scale. High energy organisms like mammals and medium energy organisms like lizards need large amounts of energy in too short of a time frame for photosynthesis to make anything but a negligible impact.
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If someone with memory issues takes a polygraph, would it be easier to lie?
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Maybe? But it doesn't really matter because polygraph results are total BS anyway. Even the machine's inventer later came out against it for being horribly inaccurate. The fact that they are still used at all should be in the category as acupuncture, palm reading, and anti-vaxxers.Polygraphs dont detect lies. You may as well be taking a thetans test for all the worth it has.
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Why do companies forbid employees from talking about salaries/pay with each other? And why at some companies it’s even a fireable offense?
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It makes it easier for companies to pay people different amounts for similar 'grade' jobs. For example, if I've worked somewhere for years and got good at the job, only to find the new guy I'm training up earns more than me I might start asking for more money, look for a new job elsewhere, or simply get resentful. Easier for the company to keep their employees ignorant. I'm not entirely sure it would be an enforceable contract term in the UK - if it happens here I can't think of examples.
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Aside from having no major enemies, why does Canada not have a military as strong as the US?
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Because there is an appropriate cost associated with size of armed forces. Canada's GDP could likely not sustain the immense cost of the US military.
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Why is there so much conflict in the Middle East? Why are other countries like the US involved?
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The fundamental problem is that most of the Middle Eastern countries are 'natural autocracies'. Virtually the entire wealth of those nations rests in the geography rather than the people. As a result, those countries are controlled by narrow elites who control the natural elites - much to the detriment of the mass of people in those countries. That sort of exclusion from full participation in your nation tends to foment unrest. To suppress that natural tendency, the various leaders in the Middle East tend to give a free hand to clerics who preach that the West is at the root of the people's troubles - while suppressing any clergy who might suggest that the troubles are a bit closer to home.An extremely complex question. There are many different parties and there are many reasons for conflict . The relationships between different groups isn’t as simple as two-sides. Countries like the US and Russia are involved for personal geopolitical reasons. There are a few truths..None of the middle eastern countries are warm towards Israel and the pure complexity of relationships between different governments and groups makes it very hard to achieve anything since most allies also have friendships with the enemies of their allies
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How do services like 23 & me know who your ancestors are? Do they somehow have access to the DNA of people long dead?
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Some bones dug up from ruins have had DNA samples taken , and [Egytpian DNA] from this). Some areas of the world have had enough isolation that their modern DNA is relatively unchanged . So the modern DNA is very similar to the ancient DNA for that area. And then there are people around the world who already know their ancestry. If you sample 1,000 people who all *know* they have X Ancestry, it is a safe bet to say that the genes they *all* have in common must be X Ancestry genes. This can then be used to trace other people back to that same group.
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If the water cycle is a closed system, why does it matter that a pound of beef takes 1800 gallons of water to produce?
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It might help by thinking of an analogy with money: if financial transactions don't destroy money, just move it from one person to another, why does it matter how much anything costs? Think about why the one matters, and it might help with the other.It matters because our rate of consumption of water often exceeds the water cycles ability to replenish it, especially on the regional scale. Also collecting, treating, and transporting water before and after use takes energy and resources.
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How can a game on Xbox/PSN freeze if its a digital download and doesn’t require a disc?
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Literally the exact same way pc games freeze without it being disc-driven. These days discs really only act as a security check for DRMs: you don't need a disc to play an Xbox game, you only need it to be *allowed* to play it. It's fully installed as a digital game, with or without the disc
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How do animals (and humans) know what food is?
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Because you gave it to him, and he probably saw you eating it too. And as you said, he put it in his mouth, like he puts everything in his mouth and if it tastes good, he'll chew and swallow. Animals have taste and smell to know what's food and what isnt.
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Why arent our eyes reflective in the dark the way animal eyes are? If you see an animal in the dark, it looks like their eyes are glowing.
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The glow of red human eyes is a little like the glow of the moon. It's the reflected light of a far greater light source. The flash of a camera travels through the pupil and hits the back of the eye – the retina. The retina reflects the light back towards the camera, but it does so just a little differently than it came in. Like most of the insides of our bodies, the retina has many blood vessels criss-crossing it. Those blood vessels color the light that shines back red. We literally dye the light red with our blood. Animal eyes glow because of a layer called the tapetum lucidum just behind the retina. This layer reflects light because that's exactly what it's meant to do. Cats, dogs, deer, and other nocturnal animals have good night vision because whatever the photo-receptor cells in their retina doesn't catch, hits the tapetum lucidum and takes a second pass at the retina again. They get more photons from the same scene. Since the tapetum lucidum is a great deal more reflective than the retina, the redness is washed away by whatever materials make up the reflective layer. Although pigment from the retina and from pupil can influence the color of the shine, most of it comes from the slight differences in levels of elements like zinc in the reflective layer. It's the lack of this layer that causes humans to have shining eyes only in photos, and not in flashlight beams. The relatively weak retina can only shine through during the powerful, and brief, flash of a camera. The flash provides a lot of light, and it's light that's usually directed at a person's face. The camera also gives off this light only for a brief second. Some cameras eliminate red eye by making two flashes. Flashes are used when it's dark, and darkness dilates the pupil, letting the retina take in as much light as possible.
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What happens when an american start-up company that's funded by a foreign investor becomes profitable? Is the foreign investor kind of like its owner?
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1. If they buy part of the company then they are a part owner. 2. If they just loan the money, then they are not a part owner. 3. It doesn't matter what country you live in. You can buy things in foreign countries, and people in other countries can buy things in your country.
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Why censoring the eyes (and not others parts of the face) in a persons picture is enough to make them unidentifiable?
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Because we don't recognize faces as it is, we have mental shortcuts like how far apart are their features from one another. Lets call the key feature like eyes, nose, lips etc as a,b,c) By removing some parts of said ratios we have more difficulty in recognizing someone, that's why people disagree when 2 people are said to look alike, they look alike when you pay attention to certain ratios that are similar and don't if you pay attention to others
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Why do our bodies store excess fat, sugar, cholesterol etc but not water or vitamins?
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Fat is super easy to store and can be a life saving energy source Water/vitamins are hard to store long term and, while important, don't give us energy that can be used for nearly any bodily function.
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Why is tickling usually uncomfortable, and why does it cause you to go into a laughing-seizure?
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Notice how most people are most ticklish on their more vulnerable spots, feet, stomach, inner thigh etc. Evolutionarily it makes a ton of sense to feel the need to protect those areas and encourage friends to get you to practice protecting them . In alot of social animals it's more obvious that even though they are only playing, its practice for the real thing.
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Why do video games strain the GPU but high quality movies that literally look like real-life, do not?
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A movie is just a series of pre-rendered 2D images. The GPU isn't really involved. A game is a 3D scene being rendered on the fly.
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What is the purpose of Netflix's "are you still watching?" feature?
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Also, to save on data if the viewer happens to have slipped into a drunken coma whilst watching Netflix but doesn't have unlimited data. ", 'It started when Netflix first started offering streaming services. People wanted a way to start the next episode automatically. This worked well, but then people would fall asleep while watching tv at night and Netflix would keep playing all through the night using up all your bandwith and causing overage charges. It was common to only have a couple gigs of bandwithShort answer - it saves them bandwidth, and it helps with their metrics for what people want to watch
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How does HIV/Aids work, and why does it damage the immune system so severely?
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Short answer is it uses one of the white blood cells as a host. Cutting out a large part of your body's emergency response system by sheer extinction will leave you much more vulnerable. Most diseases incubate for several days before symptomatic. Increasing that by a week can be catastrophic.
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What is the difference between "Frames Per Second" (FPS) and "Refresh Rate" (Hz)?
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If you have a TV or monitor it could refresh at say 60hz so 60 times a second it refreshes the image with whatever the source tells it too, PC, DVD or Blu-ray etc. Frames per second is how many different images are being sent to the monitor or TV every second. The two do not have to be the same so in the example of a TV refreshing 60hz the source may only send 30FPS to the TV. This causes the same frame to be refreshed twice. Mostly things sync up so the TV may change and refresh 30 times a second. If it's a computer monitor they tend to match the output from the GFX source.FPS is the number of frames that your CPU/GPU is calculating per second. Refresh rate is how fast your monitor is refreshing per second. Now you may think that FPS higher than your refresh frame is useless but the thing is that higher FPS will still reduce your input lag. So even if you have a 60 HZ monitor, you will still notice a huge difference between playing on 60 fps and 200 fps. V-sync will cut your frames to the monitor refresh rate; I suggest turning that off.
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Why Are Wild Orca's and Dolphins So Chill Around Humans?
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Wild one's have the ability, if they do so desire to defend themselves and could easily kill the people that get close to them in the wild.
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Why do projectiles move along with the Earth's rotation?
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The cannon and the air and everything else are also moving at the same rotational speed. Just like how a ball you drop in an airplane doesn't rocket backwards at 500mph, the cannonball doesn't spontaneously lose that surface velocity if you fire it. If you fired in a north/south direction you *would* notice that the equator is covering more distance than the poles and curving your shot. This is a well known problem and artillery crews and snipers do consider it.
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Why India is the only place commonly called a subcontinent?
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India is its own small tectonic plate. The only other landmass in a similar situation is the Arabian Peninsula. The Indian Plate is also colliding with the Eurasian Plate at fairly high speed and is actively creating the massive Himalayan mountain range that almost totally cuts the Indian Subcontinent off from the rest of Asia. The Arabian plate is generally being a lot more mellow, so the Arabian Peninsula isn't nearly as geographically separate from Asia and Africa.
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If boiling something for a few minutes is effective at disinfecting it, why can’t we safely eat spoiled meat, as long as it’s cooked at high temperatures?
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Many bacteria produce toxins that can make you sick. Boiling or cooking will kill the bacteria, but it doesn't do anything to the toxins.Usually fine. However, bacteria like clostridium botulinum produce some of the most lethal poisons known to man.
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why doesn’t Earth get hit with meteors like the moon?
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It does. But many of the craters you see all over the Moon are aeons old. The Earth has active plate tectonics, and erosion from wind and water, so the old craters no longer exist. Plus a surface that is 70% water. Meteor impacts are less frequent today than when the Moon formed , so you don't see as many newer craters.
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Why aren't babies allowed to sleep on their side?
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I honestly never understood it. Didn't help that they went and switched it up on me when I was having babies. With my daughter I was told to lay her on her tummy for the reasons you stated. Two years later I had my son and the rule was now 'back to sleep.' I lucked out. My daughter had laryngomalacia and projectile vomited until she was three months old. Had I been trained to put her 'back to sleep' we may have had a very bad outcome. With my son, he was rolling over at eight weeks and then it didn't matter what position I put him in, he'd make himself comfortable as he liked. I think the idea here is that, by the time they're old enough to move themselves around, the dangers of improper positioning are over. They aren't as helpless.Just wait until your baby arrives, you think this one thought is keeping you up at night, causing stress. Wait until they take there first nap. I checked on my kid every 2 mins to make sure he was still breathing.Like you, I didn't like the idea of putting my babies to sleep on their backs. I, too, was worried about them throwing up and aspirating it. So, I did put my babies to sleep on their sides but I used a device to make sure they stayed on their sides and didn't roll onto their tummies. It was two elongated triangles of foam that were connected; one triangle went behind baby's back and the other went in front of baby's tummy. It was spefically designed to help babies sleep on their sides. Worked for us!
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Why fighting in Hockey is considered 'essential to the sport'
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It's really easy to get away with dirty cheapshots in hockey. The idea is that fighting prevents this as an accountability mechanism. How well it works is always being debated.
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how can bugs fly inside moving vehicles?
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The air inside a vehicle, technically speaking, does not move That means, the air moves at the same speed as the vehicle. *Mostly.* The only movement that will occur is due to inertia - or, something similar to water sloshing around in a bucket if it were in that same car. Or, y'know, air vents and such. & #x200B; As for bugs, if the air is not moving, they won't all just become glued to the back of the vehicle, as the air is well, not moving! They too experience inertia, but, due to having such little mass, it's fairly easy to overcome when the car is accelerating.Destin from Smarter Everyday made a video on this. Basically has to do with fluid pressure in a contained environment as the environment moves, causing the air to slosh around kinda like water in a bucket _URL_0_', "Same reason you don't get smashed into the back of the car, Inertia. & #x200B;
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what animals with eyes on the sides of their head see exactly? Can they see both their sides at the same time?
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Chameleon have similar vision to us. Their lens are concave while their cornea is more convex shaped giving them more 'pinhole/tunnel vision'. Yes, often one eye is kept on watching predators and prey near them while the opposite eye will continue to scan its surroundings for other dangers
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Why does gravity drops off so fast?
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Zero gravity is another name for micro-gravity. Gravity exists everywhere in space. The more mass an object has the more it's affected by gravity. For astronauts, the further away they get from the earth the less the earth's gravity affects them. They are floating around in free fall, because nothing is pulling them to the ground. I tried to summarize the NASA article below. [_URL_1_]", 'It is small but reaches very far. On the ISS there is still gravity. It is constantly Falling toward the earth, but it always misses. That is the reason for astronauts flying on the ISS too, because they are falling not because there is no gravity.
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Why do movies cost so much to make? Budgets are often in the millions. Is it the equipment? Paying the actors/crew?
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On most movie sets you're paying for experts in whatever field they're in. whether it's carpentry for building sets or makeup artists or lighting directors. And you're also paying for speed. if you have a job to do on a movie set you have to be ready to do it fast at a moment's notice. And then there's also advertising and paying the actors. And do to Union you have to feed everybody who's on the movie set", '-Every person working on a major film is very likely at the top of their field. That means big, big paychecks, and not just for the cast. -Equipment costs can be in the millions. -Cost of special effects, props, and sets is easily in the millions. -Marketing costs millions.Hundreds of employees, each of whom need to be paid a salary. Oftentimes, lodging and food for them. If you want to hire an A-list actor like DiCaprio, Pitt or Downey, that can cost you $20 million, depending on which type of movie it is. Equipment is expensive. All kinds of transportation. Insurance Special effects and animation doesn't come cheap. Need to pay for movie soundtrack Props, licenses to film in locations, etc. & #x200B; In fact, with all that considered, it's surprising how LOW movie budgets are.
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How does a blood test work?
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There are two broad types of blood testing, blood chemistry and hematology. Your blood chemistry is the snap shot of all the stuff traveling around in your blood like glucose, fats, calcium etc. A side note there is a test for hemaglobin A1C that tells us how your blood sugar has been over the past 3 months. The other type is hematology this where we measure your hemoglobin, hematocrit, red blood numbers/ average size so on and so on. Your concentration of hemaglobin is what is used to diagnose anemia. Anemia can be caused by a bunch of things, iron deficiency anemia is only one type. If you were iron deficient and took a bunch the day of your test it wouldn't have an effect yet on your hematology results as it takes a bit for your body to make more red blood cells. So you would still show as being anemic. Your doctor will order more tests to find the source of your anemia.
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If an atom is mostly empty space, how are we able to touch anything, and how do atoms combine to make something solid?
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You got some good answers here but those pop science channels on youtube have made videos on this exact question. Search for them if you're interested
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If the the tail of a Prince Rupert's drop is the main weak point on the drop, how would a tailless Prince Rupert's drop work?
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For future reference, questions like this are better in r/askscience. Rule 2 forbids hypotheticals , but I'll leave this up.
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Why was cursive taught before the prevalence of typing in most workplaces? It's it supposed to be faster printed characters?
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Wait, does it mean that in your country, you don't have to write in cursive? What fo you use when you hand write something?
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If adderall calms you down if you have ADHD, why does it make you go crazy if you don’t have ADHD?
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The way I understand it: Adderall are stimulants; some people with ADD, if they're undiagnosed or untreated, self-medicate with caffeine or other drugs. The ADD person's brain is overactive, and reacts to stimulants like Adderall or caffeine differently: I could chug two cans of Rockstar energy drink and take a nap; I drink coffee because I enjoy it and caffeine jitters aren't a thing for me. The people I know who *don't* have ADD would be bouncing off the walls if they shotgunned two energy drinks.I mean downvote me away but adderall doesn't make 99% of people "crazy" just like people can drink coffee and not get all nuts. Just because something is a stimulant doesn't mean your gonna start doing back flips. & #x200B; Honestly at this point in time there are probably more people using aderall and medicines like it that don't even have ADHD at all. Because it helps anyone focus ADD or not. Its why every single college campus in the world is overun with amphetamine useOne effect of increased energy is increased focus. Adderall is one of many drugs used to treat ADD . But only if that is how your body responds. Many other drugs would be tried out if the right response is not seen.It doesn't. At low doses amphetamines have the same effect on everyone. Someone used to their dose of adderall will experience the calming centering affects of a low dose of amphetamines. If someone else takes their dosage then they start to experience the effects of a stronger dose, because they don't have the tolerance necessary to deal with it.
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how does a viral infection turn into a bacterial infection?
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If you have a viral infection and your immune system is lowered, then your body's ability to protect itself from common or not common bacteria is compromised. Your immune system gets too busy fighting off a viral infection to be effective against a bacteria that you touch, breathe in, or absorb. So, for example, you have HIV. The virus weakens your immune system enough that you can not fight off bacterial infections and you end up dying from staph .
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Why do inqueries to your credit have a negative impact on your score? It seems it would be a good thing to shop around to find good rates.
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Your credit score is generated by the potential creditor based off of the criteria and weights that they have set with the company they pay to pull the credit report. Some places don't care about inquiries. Some places see them as a yellow flag indicating that they should proceed with caution. Maybe it means you decided not to take out that loan, or maybe it means that the other potential creditor chose not to offer you the loan. Maybe you told the former something you're hiding from the latter. Or, maybe you're getting firm offers from a bunch of companies so that you can take out a bunch of loans at once. They don't know, and they're certainly not going to spend the manpower to interview every single applicant. So, they boil that yellow flag and the tiny potential risk associated with it into a number value and deduct it from the other boiled down number value.It makes you look “credit hungry”. I’m an underwriter for personal lending and the basic view is that someone who is very frequently applying for new sources of credit must really, really need it. If you’re desperate for credit, it raises questions.
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how come when you look at the sun or a star in space, you're looking back in time?
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Imagine you're stood at the end of a football field from someone else. If they fire off a starting pistol, you'll see the puff of smoke, then an instant later you'll hear the bang. That's because sound travels more slowly than light does. You saw when the pistol was fired; you saw the flash. But you didn't hear it until the sound reached you. So you could say you were hearing something that happened in the past, even if it was only probably less than a second ago. This idea of seeing into the past when you look at stars is exactly the same idea, because light also takes time to travel. Light can travel around the world 16 times in a second, so across the length of a football field it might as well be instant, but when you're talking interplanetary distances there is a significant delay. Light is not instant. It's just *very* fast. That's where the light year as a measure of distance comes in. The distance light takes to travel a year is a specific distance. so if you're looking at something one light-year away, then you're seeing the light that left that object one year ago, just like with the starting pistol you're hearing a sound that left the pistol, say half a second ago. Same applies to distant objects that might be thousands of light-years away. What you're seeing now is light that left those objects a millennium ago. In case you're wondering, that does mean some of the things you see in the night sky now no longer exist.
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How some sneakers have higher market value than bench-made bespoke shoes.
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It's extremely difficult to compete price wise with good branding and marketing. A whole lot of the cost of things comes from the name attached to it and th me cost of advertising. Example, Jordans are fuctionally ok shoes at best, but they sell for as much as $100,000 because Michael Jordan's name is on them.
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Why do washing machines have their own concept of time?
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There are 2 main causes; If the washer detects soap suds in the spin cycle it will go back to the rinse cycle. If the washer goes unbalanced while spinning, it'll add a bit of water, shake it around a bit to redistribute the load, then start the spin cycle over again. Source: I am an appliance repair technician", 'Check all the filters! Ours was really messing up the timing, and then months later broke down. Turned out there was another filter I didn’t know about that was completely clogged. Got that fixed and now it’s pretty much spot on in terms of time left.Thought it was just me. Put on the washing machine and it says 1H remaining. I calculate that I can hang dry my laundry and leave 1H later at 1600h. At 1600h, it's still 12min remaing . 😑", 'Fuzzy logic control. The machine has an idea how long a process should take but it uses feedback to alter to cycle length to achieve it's target performance criteria. Example, you know a generic cup takes two minutes to wash. But if the cup is very dirty and after a minute you see it will needs to be scrubbed longer increasing the time needed. Alternatively a clean cup you see is clean after a very short time scrubbing and the time needed is less then a minute. In this example the feedback sensor is your eyes and target criteria is based on this feedback. In a washing machine this could be a turbidity sensor looking at how much "dirt" is suspended in the cleaning waterI think the machine also tests the exhaust water at the end to check if it is properly rinsed/more or less dry. If not, then it might continue for a while longer.It's because of a few reasons, to balance your load, to distribute the water, sensing the right temperature, weighing the wet load to determine the duration needed to wash. The balancing and weighing will happen after every step of the program chosen. Some newer models actually reduce the timer between steps depending on the load.
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Why would automakers put a limited slip differential in a sports car over a locked differential or a positrac
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First, a mudding car is not a sports car Mudding is generally done with vehicles like Jeep Wranglers, and its helpful to have a locked differential so you can get yourself out of a tricky spot where you only have 1 wheel on the ground But full time locked differentials suck, you can't go around corners at any reasonable speed because the inside and outside wheel want to spin at different speeds but the differential won't let them. If you want to drive on a road you need a lock*able* differential or something that permits some level of slip. Limited slip differentials let your wheels turn at different speeds going around a corner while also ensuring that some power goes to each wheel even if one of them is spinning. They're a nice middle ground between an open differential and a locked differential without adding any fancy locking mechanism.
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how is it possible to sell items that are so cheap there should be no profit?
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Sometimes shops don't make profit on certain items. That way you go there because you like the prices, but you're not just going to buy bananas, you're going to buy other products, which they sell for a profit.
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How does a currency become "stronger" or "weaker" with respect to other currencies?
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There's plenty of different factors: * Inflation * Interest Rates * Trade deficit / surplus * Debt * Change of policies * Stability * Speculation ", 'Currency, like any commodity, have its price set by supply and demand. While most currency trades are conducted by brokers and speculators they do not have any supply or demand for them and have to buy all the currency they sell and sell all the currency they buy. But the ones that do both supply and demand currencies are the import/export companies. They buy goods in one currency and sell them in another so they have both supply and demand for different currencies. This means that the currency exchange rates are closely related to the export/import of goods to the country using the currency.If the currency goes to the gym regularly, works out, eats healthy it will get strong just kidding. It's easier to visualize the result at the extremes- imagine if you will that you get control of the mint's printing press and go wild printing $100 Bill's tripling the world supply. The purchasing power of these Hundys will be substantially diminished because everyone will have more of them and will be trying to spend them at the same time. Now imagine the reverse, such that you burn 95% of the world's US dollar currency. The purchasing power of the remaining dollars will increase relative to other currencies because of supply and demand. At any given time the governments of all nations are either printing or destroying currency relative to one another. Venezuela for example is going through a collapse, so $1 USD will get you 329M Bolivares. That same $1 USD will only get you 90% of a Euro. Hope that helps.
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Why cant we imagine a new colour?
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I've always wondered if everyone sees different colours because the brain might process colour differently with same wavelength, but we would never know. And if it would be possible to change how our brains process light so we could see entirely new colours on same spectrum, basically replacing the stuff we used to see.
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Why is it we can sometimes feel or hear our heart beating through various body parts, and what makes it happen as opposed to the majority of time where we can't?
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I can feel my heart beat in my hands on occasion. Here's something weird for you. My hands go numb when I pee. EVERY TIME. 😅😞", 'I can hear my heart beating in my ears all the time. Especially when I lay down after moving around a lot.
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Why will some buisnesses not accept $50 and $100 bills?
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Many places, especially overnight, have the cashiers put any $20 bills they receive through a slot into a vault that no one on the premises has access to until the next morning. That reduces employee theft, and makes the store is less enticing to robbers ? It doesn't do much to deter robberies if the robbers don't know about it until half way through the robbery) . But this also means they can't use the $20 bills to make change for larger bills. So, don't accept them.
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How do animals live without dental care their whole life when we humans cannot live without cleaning our teeth everyday?
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Because they don't eat sugar, their teeth are adapted to their natural diet, adapted to their natural amount of wear , and the animals also simply don't live as long as they would if they had the advances in modern medicine and dental care we use.
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Why do manufacturers of vehicles need to sell to dealerships and not directly to consumers? (except Tesla who seems to be getting a lot of backlash?)
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Just to add to whats already been stated, car manufacturers today are not really in the business of selling cars so much as they are selling the financing to purchase the item. The car/truck is a 'vehicle' to get you into a loan or financing through, ideally their own financial product offerings is the real product, not the actual vehicle itself.There is a great video called “Adam Ruins Everything, The Real Reason Car Dealers Are the Worst”. Worth a look
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Why is it inherently worse to eat a fast food burger than to cook one at home?
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It's not. Fast food is no more unhealthy than if you made the same thing at home. It's just generally cheaper so people eat more. A McDouble is $1.50 and 380cals. Spend $3 and you're at nearly 800cals.
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Why is hunger satisfied almost instantly?
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Because in today's western society no one really knows anymore what true hunger is. What you are experiencing is an appetite at most and best. Many of us are addicted to food, sugar and the products we consume every day, so we feel a constant need to eat something. But we really don't. As long as we got fat reserves, we can go without food for days or even weeks without going terribly hungry . Our bodies were not intended to eat all day, but since most of us do, we assume to be hungry all the time. This brings us back to the original question: Of course, the stomach would not be satisfied as soon as we swallow our first bite. But the brain is, because now, we're eating again.
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How does an IRA or Roth IRA make money? Is the broker using my money to invest then I'm just getting a cut of what they make?
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They make money from the transaction fees when you make trades, lending your funds when they are not invested, ie. when they're sitting in a money market account waiting to be invested -- just like any other brokerage account.
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How do brands like Smartfood pop their popcorn so that it's so much fluffier than what I make at home?
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I'm a mechanic for a healthy snacks manufacturer. The combination of hot air and kernel type are what achieve that fluff. We use an industrial hot air popper similar to [this]. The kernels travel through a large perforated rotating drum which cooks them for roughly 2 minutes at just under 500°F.
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If your skin is constantly replacing itself through cell division and replication, shouldn’t tattoos eventually just fade away? What makes them stay on your skin forever?
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[On mobile so hope I link right] That's a smarter every day video where he explains how tattoos work. It's super informative and he breaks it down really well.
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Why is it possible in the US to convict someone for several consecutive life-sentences?
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Because America doesn't believe in rehabilitation, only punishment. Studies have shown that the majority of violent offenders grow out of their aggression and violence later in life. Also an ex con is set so far behind when they are released that a lot of them choose to go back to prison for a free meal and housing.
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Is the alcohol in mouthwash the same type as found in wine and beer?
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It's the same alcohol -- ethanol. It's in relatively similar concentrations. The old-school yellow-bottle formulation of Listerine is around 54 proof. So, not quite as strong as hard liquor but stronger than wine. You shouldn't drink recreationally though. The active ingredients -- the germ killing agents -- mean that it is considered a 'denatured alcohol'. You could probably get drunk off it, but you'll also get sick in other ways. Many people avoid alcohol in mouthwashes for other reasons. Many consider it hard on the insides of your mouth and worry that long-term use of these types of mouthwashes can increase your risk of oral cancer. I don't know valid these worries are, but they are common enough worries that many 'alcohol-free' options are available for mouthwash.
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Why is there no way to get feedback about why you didn’t get the job?
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You know the people who interviewed you. It's okay to call them and ask them for an explanation, after assuring that the call is for self-improvement only and not for harassing.
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