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bzld7h | Why are wall outlets 110V or 220V? Those seem like such arbitrary values; why not 100V? | In many parts of the world, electric companies sprung up, each making their own flavor of power (certain voltage, amperage, cycles per second, etc.). This caused one really big problem: you buy a lamp and it works in your house, then you move to another part of town, and it won't work because the power is different.
& #x200B;
At some point, it was necessary to standardize the way power works so that there was interchangeability, technicians didn't require retraining, etc. In the end, 110/220 were completely arbitrary. It could have been 150 or 200 for all that matters, as long as everyone used the same one in the same country. | 84eecacd-9797-4492-935f-027b0f3e6713 |
bzlgb8 | How does speed affect the way we perceive time? | It's not a difference of perception, it's actually a difference in how time elapses. This is called [time dilation](_URL_0_) the faster you travel, the slower time elapses, all the way up to the speed of light, where you cease to experience time. | d810c68c-dfd2-4167-bff2-33cb31afecb2 |
bzljl2 | When your iris changes in size from light why does does the area we can see not change? | It's because the retina -- where light is processed into signals for the brain -- it's kind of like a movie screen -- is not immediately adjacent to the iris.
If the retina were adjacent to the iris, then yes, a smaller iris aperture would mean a smaller field of vision.
But light hits the retina (the curved movie screen) pretty much all over whether the iris aperture is tiny or large, because the retina is a centimeter or so away from the aperture.
edit1: I had no idea this thread would be so popular!
edit2: I neglected to mention the work of the lens, which is pretty important. I was thinking along the lines of the pinhole camera, in which the hole itself is the lens.
edit3: Sorry about the "centimeter or so." How's "centimeter or two"? Heh. My bad. | 7b5a2d5b-b5d6-4dce-9cac-b9c338417b4f |
bzllry | Why men’s bathrooms often have a low urinal for small boys but never a low sink or one with a step stool. | Because it's easier to lift your hands to use a sink that's high up than it to lift your waist an extra foot.
Also, if a kid cant wash his hands, not a huge deal, but if a kid cant pee, its gonna be a mess and a whole deal | f784198e-711d-4794-ae4c-2e0d3dd1fd6e |
bzlmpt | Why is alcohol measured in ABV instead of the size of an actual measurement, like they do with marijuana products? | Alcohol is normally not an ingredient that is added to a product. It is something that forms as part of creating the product. As such it is harder to control an exact amount. They can get a measure of the proof and could calculate back to get a measure of the exact amount of alcohol but it really would be a calculation.
With the pot products you mentioned they are adding pure ingredients into the product so can fairly easily control the exact amount. They add 15 grams of pot to x amount of chocolate to create so many bars with 15mg squares. | 79ce223e-9e8e-47e8-8643-21717137f62c |
bzlt1a | How can Congress not show up to hearings? Isn’t it their job? | In practice, only a "quorum" (that is, a minimum number of people) needs to be present. If there aren't many people present, any member can make a quorum call. If there is not a quorum, the leader of the chamber can order the sergeant-at-arms to arrest members of the chamber and force them to appear.
& #x200B;
In a couple instances, one party left in protest, and the other party was able to force them to appear again.
& #x200B;
You are right, it is very disrespectful of Congress people not to appear. If there are sufficient members present, however, and/or nobody makes a quorum call, then pretty much they can do whatever they feel like. | 28caf0e6-357c-4ba2-b1d5-2f2518fcc34d |
bzlv0p | Why does the road on a hot day have the weird effect of almost puddles in the divots in the road until you drive up to them? | That’s actually a mirage! The hot surface of the road heats the air just above it to a hotter temp than the air above that, increasing the index of refraction of the air and bending light like a lens. This causes light to be bent away from its normal path. Your brain (via your eyes) assumes light travels in a straight line, not a bent path, and gets confused. The most common way light gets misdirected on the way to your eye is due to a reflection off of water, so your brain assumes that’s what’s going on and interrupts the wavy light near the surface of the road as a puddle. But the closer you get to it, the less bent light makes it to your eyes, and it looks normal again. | 2bf6024b-4ac1-4c09-a25b-71ec8b9708ee |
bzlygv | Why natural lights feel so much better than any of the artificial lights? | Our eyes have a retina at the back, which consists of rods and cones. Rods and cones are little receptors in the retina that take the light and turn it into electrical impulses which the brain interprets to form images. These rods and cones have adapted over time to best suit the natural light from the sun so that we would have a better chance of survival. However, the artificial light sources are different from that of the sun and our eyes strain to either filter out the excess light or to try and see with less light thus it makes it feel more difficult to see in artificial light. In a sense it is like trying to fit a large squeezy ball through a small hole. It can be done, just with more effort | eb167b25-b66b-41fd-99a6-f49094f76053 |
bzmf6i | How are cities just “buried” and built on top of? | Well, for the catacombs at least it's actually the other way around. As a TL;DR At the end of the 1700's there were large sprawling networks of stone mines haphazardly placed under Paris that were threatening the structural integrity of the city, and at the same time the city was also facing a crises with graveyards literally overflowing. The Parisians of the time decided they could solve one issue with the other so they reinforced the mines and emptied the graveyards down below. Essentially they mined out the underground and filled it back in later with infrastructure. | 50590dc2-a1ae-4cb4-8b25-669153b727a8 |
bzmyqb | How does the human eye focus in and out of things | The lens in your eye is made of flexible tissue. There are muscles attached to the edges of the lens. As your brain says "Change focus", those muscles are contracting and relaxing and this changes the shape of the lens. This is what allows you to change your focus on things close and distant. | 3bf8997c-45af-465c-acfa-3b1865559990 |
bzojo4 | How do seatbelts in cars stop themselves if they are pulled out too fast? | Since a picture speaks a thousand words
\[Imgur\]( [_URL_0_](_URL_0_) )
& #x200B;
This is a grillon, a fixture from a climbing harness that works in a similar way so it's easier to describe. In the pictures the top rope is hanging free, the bottom goes to a hook that is secured to whatever im climbing. In a seatbelt this bottom line is the one that goes across your body and my hook is where you clip in, the top would be coiled up inside waiting for you to pull it (slowly) from the drum.
& #x200B;
In the second picture you can see what happens if the bottom line is pulled too fast, the rocker in the center tips up, and the chisel-like end bites into the rope where it enters at the top. This prevents any more line being pulled out, in a car the seatbelt locks and prevents your body from continuing forward, on my harness it stops my fall. For what its worth I daily entrust my life to the device in these shots, i've never fallen into it, but I use the way it locks up to just hang by it. Actually falling more than about 15-20cms on it would be dangerous anyway since it my harness would cause internal injuries beyond that. (the situation is a little different, im accelerating under gravity from rest) The lever on the side bypasses the rocker, so if i pull that open then i can sharply pull out line as needed | e6aeaf7a-2cd8-4154-b826-cf3b21db1a72 |
bzovlr | Why can an electric car (like a Tesla) still be beaten in a race by a classic car? | An electric motor is limited by the amount of current the power supply (which is a combination of the batteries and the associated control circuitry) can deliver.
Why you're seeing Tesla cars beating muscle cars and drag-strip type cars has to do with the fact that an electric motor delivers maximum torque when it is dead-stalled, whereas a gasoline motor doesn't hit the peak of it's torque until well into middle RPM range. This is what allows you to stomp on the pedal in a Tesla and go from zero to 60 in a heartbeat while the guy in the gasser is still waiting for his engine to hit the sweet spot in its torque curve. | 55c78935-0e06-4689-b952-8c9d70e50ff8 |
bzox6r | Why does alcohol cause certain aggressive behaviors but weed does not? | Alcohol doesn‘t cause aggressive behaviors (as far as you‘re not an addict). People that react aggressive when drunk are always aggressive, they just can control themselves better when not drunk. Weed and alcohol attack different parts of your nervous system, weed just doesn‘t lower your ability to self control that much. On top people are differently sensitive to alcohol, some can drink 5 beer and are completely chill, others are close to a blackout.
(What probably really causes people to act more aggressive are steroids and stimulants like cocaine) | 3ef43858-356d-44d7-8801-2c0b21586d71 |
bzoy12 | Volts, Amps, Ohms, Coulombs | You can think of electricity moving through a wire like water running through a pipe.
Volts (Electric potential) is like the water pressure of the pipe. It is effectively how much the water (or electrons) wants to get to the other end of the pipe.
Amperes (Current) is like the flow rate of water, in volume of water per second moving through any specific part of the pipe. An Ampere (amp) is 1 Coulomb per second.
Ohms (Resistance) are a measure of how a valve resists the flow of water. If you have a high-pressure (high voltage) pipe, but add a valve halfway through, the downstream half of the pipe will be at a lower pressure (lower voltage).
Coulombs (Electric Charge) are the actual charge of the electricity. A coulomb is defined as 1 Amp-second, meaning that they are like the volume of water delivered by a pipe at 1 amp for one second. If you have any chemistry background, a coulomb has a charge equal to ~6.2e+18 electrons, so I like to think of a coulomb as "the molar charge of an electron," as an analogue to "the molar mass of an atom." | 52d83adc-0add-43ff-9bca-7620c25eab3f |
bzoyd9 | How do airplanes vanish from Radar? | Radar needs a direct line of sight to something to be able to see it. This limits ground based radar to a range of about 60 miles. Major international airports will have radar that can see that far, but smaller airports - particularly those outside of the US - don't.
Radar coverage throughout the world is pretty minimal. Civilian radars typically only cover a small area around airports while military radars only really cover the area around airbases as well as some potential conflict zones. Chances are that you're outside of radar coverage if you aren't flying over a major city.
However, commercial airliners are all equipped with a radio transponder that is just constantly broadcasting the plane's current GPS coordinates and height. This allows airports to see where planes are far beyond the range of their actual radar.
When a plane suffers some sort of catastrophic problem - such as blowing up in mid air, that transponder gets destroyed and stops broadcasting. This is what the media will typically refer to as the plane "vanishing from radar." In other words, the plane wasn't actually being tracked by an active radar system, but it was showing up on an airport's radar system because that system is capable of detecting the plane's transponder signal out to a very long range and displaying the embedded positional information on the airport's radar screen.
In the case of Malaysia Airlines flight 370, the theory is that the pilot turned the transponder off. If the transponder is off, then the plane will only show up on radar screens when it comes within that 60 mile range of an actual radar system that puts it close enough to be detected. | 113a644a-1e00-4e93-8097-d5a9eaf31624 |
bzp2i0 | why is the west (europe, america) so quiet about the protests in Hong Kong? | When "The West" gets involved it gets criticized for sticking their nose where it does not belong.
When "The West" does not get involved it gets criticized for not caring.
Given that the end results is the same (being criticized for what you do) it is simply more economical not to get involved in political situations where there is no natural resource (e.g. Oil) that you can then benefit from. | f8926100-6703-47e0-ac69-26fe781ab763 |
bzp6iy | Why does stress make autoimmune conditions worse? | Your body gets kinda used to cortisone on the long run and you start to see the side effects of it, like ostheoporosis, diabetes, mood swings and other stuff, therefore cortisone isn't really advised for long period therapies to treat any kind of disease. Monoclonal antibodies are a preferred therapy to reduce inflammation. Anyways i'm not sure that cortisone make the autoimmune disease worse by itself, i can't think on top of my head why that would be the case. If you have any documentation feel free to link it to me. | a5450713-c21c-4a65-b3c4-a3d00968920d |
bzp7bg | What's the basis for US Confederate support today? | In before the historical revisionists ...
> I was taught it happened because the new constitution abolished slavery and the Confederates wouldn't have it.
First, some clarifications. The Constitution wasn't new. It had been around since 1789; the Civil War started 72 years later. And the Constitution didn't abolish slavery until the 13th Amendment was ratified in Dec 1865, seven months *after* the South had surrendered to the North, ending the Civil War. Lincoln's Emancipation Proclamation, changing the legal status of existing slaves, did come in 1863, but even that was already almost 2 years into the Civil War. However, prior to the Civil War 19 states (out of, I think, 34 at the time) had abolished slavery at the state level. Eleven of those remaining states that supported slavery seceded from the Union rather than face the obvious direction the country was heading. Four of the slave-owning states (Missouri, Kentucky, Maryland, & Delaware -- the so-called border states) remained in the Union.
Clarifications made, the Civil War was absolutely about slavery. It was the central, defining issue of the war.
There are going to be people who tell you that the Civil War was about individual states' rights vs federal power, and it was ... to the extent that the states wanted the *right* to own slaves. There are going to be people who tell you it was about economic differences, the industrial North vs the agricultural South, and it was ... to the extent that the economy of the agricultural South depended wholly on slavery. There are going to be people who tell you it was about territorial disputes in the expansion of America west of the Mississippi, and it was ... to the extent that Southern states wanted slavery legalized in the new territories. And so on.
You're probably going to find people in this thread trying to convince you of Southern heritage and values and the reasons they have to take pride in their heritage and how the war wasn't *really* about *just* slavery and how the Confederate battle flag reflects their Southern heritage, not the secessionist battles it flew over in the name of slavery.
Don't buy it. The Confederacy was built on the back of slavery. That's it's heritage. | 5ca9ae39-3be0-41fc-853f-e6858dc49621 |
bzpg66 | China's extradition bill and why people are protesting against it? | If the extradition is passed, China can simply extradite anyone from Hong Kong for political reasons (where capital punishment doesn't exist and is a democracy) and enforce heavier punishment onto them in China. | 3d355a10-c4d8-40ba-9b44-03f59eb2b077 |
bzpx2k | What is the extradition bill in Hong Kong? | Hong Kong is a weird situation. The land was leased and developed by the British, under terms that it would eventually be given back to China, which agreed to take a long time to fully reabsorb into their government.
The transfer itself has already occurred, and China is slowly imposing new laws in Hong Kong as part of its reabsorption.
The latest proposed law is an extradition "treaty", which allows China to arrest people who are in Hong Kong, even travelers at the airport, who may be violating some aspect of Chinese law, like being a Christian Missionary. | d47051e6-dfb7-419c-b8c9-a2c6aa0db470 |
bzpycb | Could we build nuclear power plants underground? | Must look at the tectonics of the potential site. Unstable tectonics could lead to a disaster | 9d3683b1-b638-473c-a366-5a0be62c49e1 |
bzq5df | Why do some countries pay in small number currencies like the dollar and other countries use thousands and millions like Vietnam. And was there a time these countries had lower number currency? | Quite a lot fo currencies started out as being worth the same.
Back when everyone still made or backed their currencies with precocious metal you had coins made out of silver and everyone who made a coin of the same weight with the same level of purity of silver had something that was pretty much worth the same.
The one that kicked it of world wide was Spanish Dollar, which inspired the US to make their own Dollar but also led to the creation of the Japanese Yen.
Back in those days a Yen was worth and USD because they were both pretty much the same thing.
Eventually people stepped away from making their currency with actual precious metals and stopped backing them with precious metals.
This allowed currencies that formerly were on the same level to diverge and inflate at different rates.
Today an US dollar will buy you more than a hundred Yen.
The exchange rate however has little to do with how strong or reliable a currency is and only really is a testament of past inflation.
Since too large values like having a million of the local currency be the cost of a piece of bread is not exactly inspiring confidence and is hard to handle some countries have in the past reformed their currency to make it smaller again.
Turkey for example a few years ago simply struck of six zeros from the value of the currency to turn one million Lira into 1 new Lira. It didn't change anything about the currency itself but it looked better and was easier to handle. | d536816f-463d-4fd3-bd40-ec7f8977c10a |
bzq7p4 | With all the amazing video and photo capture technology we have, why do directors/cinemas shoot/play movies at 24FPS? | Initially it was to do with the cost of film stock. 24fps is the sweet spot where our brain sees the images as fluid motion. As such, cinemas bought projectors that work at said frame rate. It's simply just an expensive exercise to go and retrofit cinemas with new technology when their current setup is adequate.
It also does feel a bit weird to watch a movie in a faster frame rate.
With that being said, there is a gradual shift happening so a certain point will be reached where it would make more sense to move to a more modern format - some recent movies have been shot in 48fps for example. | 6dfeadc4-f817-4cce-9d88-be9846ecfff5 |
bzq7px | Do wired earphones use less battery than Bluetooth? Why/why not? | I think the power used to broadcast the Bluetooth signal is higher than what it takes for the device to power the wired speakers. | af6e56b1-b91d-4f2d-842e-761c4fb0cc63 |
bzq947 | how does the fuel gauge in vehicles know how much fuel is remaining? | A float in the tank goes up and down. As it goes up and down... It is connected to a resistor. So full will read x amount of resistance and empty y amount of resistance. Values in between are simply divided up equally.
The gauge in you dash basically reads that resistance and outputs it as a needle reading that points to a number. Full empty etc.
Basically if you take the wire coming from your fuel tank and apply a resistance to it... You can trick your fuel gauge.
This is also how they test the fuel level sensor. The manufacturer tells the mechanic what resistance range it should show. They use a multimeter device and it shows the value. | d5193ece-cfba-4e32-b329-d753677d5236 |
bzqip0 | What has caused the potential future decrease in Social Security Millennials are likely to receive? can it be built back up to reflect current day payout? | The main factor is that due to advances in medical care, people are living longer than originally planned for.
Another issue with it is that a good portion of the money goes into a "trust" fund of which the US government pays interest. That money is used for other programs. The one thing that the US government is good at is spending money, so the money is being spent faster than it is being taken in.
Between people living longer, and pulling benefits longer, and the money being allocated to programs outside of social security, the program is running at a deficit. | a25b4854-fd90-493a-8a5d-8b5d7cb23208 |
bzquw2 | Why is the Hong Kong government not facing serious international consequences for their actions the last couple days? | Because they are an economic and military superpower. They are also a sovereign state.
Traditionally when a state is out of line, other economic superpowers would impose sanctions that hurt the state economically. China is so ingrained in the world economy that we can't really do that.
Now, if they started genocide, someone might step in, but what they are doing isn't so out of line that anyone really feels the need. | 26f8f7ee-c873-42e7-ad6d-52ce9dd8168b |
bzqvv4 | How do those self-inflating packing sheets work? The ones where you remove them from a spool and they piff up automatically? | They have two different chemicals in them. You pop the inner package and they mix. The reaction causes gas to form expanding the package. They also produce a little heat. | b5036f3f-e619-484f-8157-c8bcbbf49dbc |
bzqwu4 | How can scientists be confident that GMOs won't have multigenerational impact? | Well first of all, because they just change the Genes of the food. All living stuff have different genes, the cow you eat have a different DNA than the banana you eat. So the fact that the genes are changed doesn't change how it interact with you when you eat it. Some of the fear is that suddenly it will affect your body and that you could end up with foreign DNA in your body, but that total nonsense. When you eat anything you end up with foreign DNA in your body, DNA that will be break down as you break down the food for the nutrient and GMO doesn't change that basic fact. They are modified genes, they are not magic.
& #x200B;
Secondly pretty much all our food are already GMO and we were creating them since the first time we started doing agriculture. For thousands of year we were doing breeding and selection of our food to get the best food we could. If you would look at what natural banana or corn look like we wouldn't recognised them . We selected them for thousand of years to what they are today and that modified their genetics.
& #x200B;
So what is the deal with GMO? The only difference is the method with which we do the genetic modification. Instead of breeding and selection that is limited and take several generation of the plant to create significant changes, we can now change the genes directly with our modern tools and methods.
& #x200B;
So ya the vast majority of the fear of GMO is completely nonsense, the fact that we change the genes won't magically change how food work or affect the human body. That said, there is some issues with GMO that can occurs, but those are usually far more subtle than the fear mongering you see on the internet. Some of those problems come from the intellectual properties that are GMO. A company spend a lot of money to develop those GMO and they of course they have a right to get some profit from those products. The problem is that they could decide to change the genes of the seeds to make them infertile to make sure that all of the seeds need to come from them. Another problem is that if one specific GMO is so efficient that it become widespread, and this lack of genetic diversity can be dangerous. In 1950 a disease almost wiped out the main species of Banana that was cultivated, and more genetic diversity can problem our crop from a single disease risking to wipeout a majority of our culture. Another problem is that GMO can be modified to be more resistant to pesticide, which would allow farmer to use more of those. That isn't necessarily a problem, but if they can suddenly put twice more pesticide, maybe a product that was safe wouldn't be anymore until the regulation catch up.
& #x200B;
Most of those problems can be fixed by proper regulation, but with the speed at which new GMO can be produced, that is harder to do, compare to when we used breeding and selection to create new crops. | 78342756-05d6-4fe6-9913-32034b9e8ee2 |
bzr022 | How does a video game programmed in a PC get stored in a cartridge that can be played by a console? | So ultimately what gets run on any piece of hardware is machine code, instructions that the chips on that hardware can understand. You can program in any "high level" programming language and then compile it, which means turning it into machine code. It's like translating from English to a region's local language. You can "target" a specific set of hardware, say a Nintendo Switch, by compiling specific machine code and making sure you meet certain limitations. Generally, developers who want to make games for a console can request to buy a dev unit from the makers, which is a system that has all the same specs as a normal console but are otherwise meant for ease of testing. They make sure that their games run well enough on the target system before publishing the game. | 3da4f6a8-9411-4ffe-b1cd-6e770786a92f |
bzrctl | What is the role of iron in the Haber process? | Acts as catalyst for the process so that ammonia can be produced. It’s spread on on large beds of iron. I don’t know the chemistry on why it speeds up the rate of reaction. I’m sure someone could explain that much better. ☺️ | 3756187d-bfc0-4b8e-83f9-cb5afc405732 |
bzreti | How can we tell what the core of a planet millions of light years away is made of, yet we're just now finding a 4.8 quintillion pound mass of metal under the surface of our own moon? | Well, I mean you can use binoculars to determine the exact gender and breed of bird eating at your bird feeder in your back yard but still not find your car keys in your own house. One has nothing to do with the other. | 6514110d-371a-4642-9c85-592bafbb9d9e |
bzrg40 | Why does elevating an injury, such as a sprained ankle, help with the healing process? | Raising the injury helps the body to absorb the tissue fluid that has leaked out because of the injury.
This also helps with reducing swelling, which can make the injury feel a little more comfortable as well.
Ice and NSAIDS (Such as ibuprofen) also help to reduce swelling and reduce restrictions to blood flow. | 11cae79b-cb8b-40dc-b0be-84ea6635f2c1 |
bzrl12 | In a given location, is relative cloud cover a product of temperature, a symptom, or completely independent? | Trees have to regulate their temperatures just like other living things, and one way they stay cool is by allowing some of their stored water to evaporate, a little like how humans sweat. That can form clouds over forested areas.
& #x200B;
I think one can see the opposite, too, although maybe not in your hypothetical place. In Central America the deforestation of the Yucatan peninsula is obvious now and it's easy to spot the deforested/savannah areas in Ventusky through their lack of cloud cover and noticably higher temperatures (example: Peten, Guatemala).
& #x200B;
Therefore both temperature *and* relative cloud cover can be dependent upon the presence of a forest. | bdd5f3a7-28e7-4fca-81a5-0c0bafb0f390 |
bzrpwg | Why is there so much clipping/ what causes the clipping in Bethesda games? | The games are massive and open plan. Everywhere 2 sides meet is a potential point for clipping but due to the size of these games it is very labour heavy try to find all the clipping spots.
Classic corridor games are much easier to debug for this because there is a much more restricted area that you can walk about on.
Bethesda have a reputation for being lazy when picking these up but that might be unfair.
I'm surprised we haven't developed AI for testing this sort of thing tbh as it is very menial work to sort through. | 85a462d0-bd18-4f8b-b907-1fbb0c392403 |
bzrqbi | If there is any reason why gluten free products use a different type of plastic? | Companies that produce both “regular” and gluten-free varieties of a product want to make this difference very easily, visually distinguishable. It’s essentially a marketing decision. | 580a9b37-608c-4e52-b68a-256bcfaf7895 |
bzrvkx | If were not really sure what causes diseases like bipolar disorder, how are doctors able to prescribe medications like anti depressants? | They try to fix the symptoms while they learn more about it.
If something destroyed the bridge to your home. You're going to try and rebuild the bridge while you try and figure out how to stop what broke it in the first place.
I'm Not a doctor. | e8a9f8af-bf47-40ea-8c4d-8e707c580710 |
bzrw8a | WTF is happening in China right now? | Hong Kong is a lot more liberal and western than 'mainland' China and enjoys a fair bit of autonomy despite being notionally part of China.
The current protests are over new extradition laws which would potentially allow for people to be deported to mainland China for sentencing and punishment where the penal system is generally more severe. There is also worry about China doing its usual "re-education" of political opponents and outspoken commentators.
Hong Kong isn't exactly as free as western Europe but not as bad as mainland China. The people don't like it so a protesting (note covering faces to protect identify and prevent backlash). As always the news covers the most sensational parts with clashes and rioters because it is more interesting than half a million people slowly walking down the street, so it looks like Hong Kong is a war zone.
That's not to say the crackdown by government hasn't been heavy though... | 2d27f64c-bb7a-4233-a52d-02df2aa62508 |
bzs1f4 | Why are bugs attracted to lights, are they looking for warmth? And then why do they stay at the light source till they die? Why don’t they figure out there’s no nourishment here and move on? | Bugs aren't attracted to lights. Rather they don't understand that they are lights to begin with: they think those lights are the sun.
Bugs use the sun to nagivate. But when the light source you think is the sun (a giant ball of plasma millions of miles away) is instead a lightbulb (a tiny bulb a few feet away) that will screw up your navigation. | 1b8a2f53-5ba7-4aa5-add7-bab3dfbdaa6f |
bzs8qu | When you look to a spinning car wheel, everything gets blurred. But when you blink, all details are visible for a millisecond. Why is that? | Persistence of vision. We dont see frames, we see continuous movement, and not only that out eyes/brain see several milliseconds at once.
When you blink you reduce the amount of time your eyes can see so etching moving. Less movement means your eyes/brain have less time to see that movement, but your brain is smart and will actually catch what you saw and remember for a small amount of time allowing you to remember some details. | 0e965641-f22e-42a8-b4d4-30cb1fd89dd9 |
bzs9ty | With so little land and resources, how is Great Britain still as rich and powerful as it is today? | Colonialism.
They exercised control over large swathes of land that were resource rich, like India which had a shitload of tea and cotton and spices which were very valuable commodities. Turns out that you can exercise control over 100 million with only like 1 million people. People are easy to control, especially when you make them feel like they're getting at least something out of it.
This allowed Britain to quickly become a service based economy, which means they can make a shitload of money off clerical labor decoupled from physical raw resources. | 29933de9-3b55-4a4f-9b0d-05a2fe362369 |
bzsa0z | So, how exactly are electricity and magnetism the same phenomena? If they are the same thing, what causes them to act differently from each other? Or, is this just a concept that we accept and don't question? | They are both manifestations of the same force, Electromagnetic force.
They aren't the same thing, they occur on perpendicular axis to each other, that is why they act differently.
& #x200B;
When a magnetic field moves (magnetism), it causes electrons in atoms to be pulled along with it, if the electrons move (Current; electricity), they cause the magnetic field to move with them. They are coupled. | 7c4f45f1-2ee2-4477-aefa-a8c78bcc5749 |
bzsmsc | Why has Hong Kong been rioting for the past few days? | Actually, it's not a riot but a civil disobedience. The Hong Kong SAR government intend to modify the policy on fugitive because of a murder happened in Taiwan. However, these changes will allow HKSAR government to extradite whoever the China government want especially political prisoners or any one who is a threat to the power of China government. Given that the human rights in China is obviously low and the fear of being extradite to China for no reason, there are no choicefor us but to fight back. | d2ee32e2-6a63-4176-b459-4326f5445906 |
bzspuz | What causes needles (injections, drawing blood) to hurt? It's a very tiny piece of metal. What is the mechanism to cause so much pain? | That all kind of depends on nerves, what part of the body it's going in, skill of the person doing the sticking, and how big of a baby you are. | 52451398-e1e7-4b1b-89f0-629cefab4298 |
bzsuj1 | what chemically happens to milk when it goes sour? | The lactose (milk sugar) is converted to lactic acid by lactobacillus bacteria (same ones that make yoghurt and cheese). The increased acidity causes the milk proteins to denature (unfold), exposing bits of protein that are hydrophobic (want to stay away from water). These bits then stick to each other, making clumps that hide the hydrophobic bits from the water. | d9f46be4-4156-4e9e-955e-7a018d41152b |
bzsx9m | Does the photoelectron have a specific charge, and if not, how come? | Yes, the photoelectron has a specific charge. That of an electron, because it is an electron. It is an elementary charge. | fe2dd167-35cb-4434-96ae-66678ffd7e3d |
bzsxnl | How does the fed decide on how much currency to print? | The (kind of boring) answer to that question is that the Fed prints enough currency to replace the used notes it takes in and destroys, plus any additional currency banks request (by trading in some of their non-currency assets at the Fed). Actual printed money is just a tiny fraction of all money, so the Fed doesn't use it to carry out monetary policy.
Actual monetary policy happens when the Fed buys or sells treasury bonds. To increase the money supply, the Fed goes to banks and "buys" bonds from them. It then destroys those bonds. The end result is that there is more money (specifically, the money the Fed created to buy the bonds) in the economy. However, none of this is done with paper currency, just with accountants keeping track of debt obligations.
When deciding how to set the money supply in this way, the Fed follows a "dual mandate". It is supposed to maintain low levels of both inflation and unemployment. In general, pumping money into the economy will lower unemployment but raise inflation. The Fed keeps track of both those things and makes a lot of money when inflation is low/unemployment is high and less when inflation is high/unemployment is low. | f41a6764-6e98-405a-a13b-950f76a4894d |
bzt0kv | When flying in the US, why does TSA allow two 3.4oz bottles but not one 6oz bottle? | The purpose of the rule is two fold: a) easy for TSA to apply at industrial scale and speed at a checkpoint; and b) hard for evildoer to use to get a bomb past the checkpoint.
If you think 3.4 is an unusual number, that's all (a). There are companies that use 3oz bottles and companies that use 100ml bottles and 100ml = 3.4oz. While the US usually ignores the existence of the superior metric system, the TSA is smarter than that.
Why not a quart bottle, if you're allowed to bring a quart of little bottles? That's all (b). In a quart bottle of peanut butter you could conceal almost a liter of evil. With a thin coating of PB on the inside of the container and 900ml of plastic explosive inside, you could blow up a plane. No simple visual search, remember requirement (a), could detect this. The little bottle rule doesn't prevent this, but it makes it much more work, and raising the work factor for evildoers is the TSA's main job at checkpoints. | c24d7752-1b72-4092-b3f4-84398d751edf |
bzt1vb | Why is it considered dangerous to use your device while the plane is taking off? What does Airplane Mode do to combat this? | Takeoff and landing are the two most dangerous parts of flying; if the plane doesn't crash during takeoff or landing, it is most likely not going to do so in the air.
But because planes carry so many people and a crash from even 100 feet up means that most of the people on that plane are likely to die, air traffic regulations don't fuck around.
Theoretically, your cellphone shouldn't be able to fuck with air traffic control's communications, as the device is designed to not cause harmful interference, and to accept any harmful interference it receives; those little stickers that say that, those design constraints on consumer electronics, and that regulation, are all there specifically for air traffic control, by and large; their radios don't follow that rule: they will cause harmful interference if they have to, they will not accept harmful interference if they come across it.
But despite the fact that it *should* be impossible to fuck with ATC's radios with the radio waves sent/received by your phones, because we are dealing with metal tubes pushing hundreds of humans through the sky at several hundreds of miles per hour, we don't fuck with "should be"; radios can't transmit harmful interference if they're off, so we have them turned off.
Even if it's a 1 in a million chance that a cell phone could mess with air traffic control at all, and a 1 in a million chance that that interference will cause a fatal crash, there are about 2.7 million passengers flying commercially *per day* on about 87,000 flights per day. It might take a long time, but eventually over a long enough timeline, even 1 in a million becomes a certainty.
It's the same reason that airplane bathrooms have ashtrays even though smoking isn't allowed; it's a failsafe; if the measure of telling people "don't smoke on the plane" doesn't work, and the smoke detectors fail, then at the very least there's an ashtray so that nothing flammable gets an ember (or it's a very low chance).
You want to stack those probabilities as much in your favor as you can, because when planes crash, people die. | 5c74a1e6-f13f-4f69-8aa8-5357b76e6886 |
bzt5hw | How is the triple point of water possible, and what exactly happens? | Iron also has a triple point - at near vacuum and 1600C.
Not all materials have this since some more complex molecules do not exist as gases and liquids. Rubber decomposes upon heating and will not melt.
For the materials that don't decompose, there's always two competing forces:
Pressure wants to force gases into liquids and (usually) liquids into solids
Temperature wants to melt solids into liquids and boil liquids into gases.
At the triple point, both of these forces are balanced. You're at the exact temperature and pressure where the solidifying force of pressure and the vaporizing energy of heat are equal.
That *doesn't* mean you can move between phases effortlessly, but it does mean that all three phases can coexist indefinitely. There's an additional energy input required to actually melt and boil, but this won't change the temperature of the system. | e1b4ef0a-aa88-4dfc-8d63-16927145bb0f |
bzt6hl | Why do countries buy then sell other's money? | Countries aren't typically doing it, people and companies in those countries are.
Let's say you want to buy a Mercedes. The factory workers are paid in Euros, the corporation selling the car ultimately collects revenues in Euros. But you go to your dealer and pay in US dollars. At some point, those dollars you pay the dealer need to get converted in to Euros.
There is a single exchange rate as the official rate, but retail exchanges like you'd find in an airport or tourist areas have a spread between buy and sell rates that is their cut of the transaction to stay in business. | 59af5e26-afb1-4e20-87de-394f986c19f6 |
bzt8om | Why are people protesting in Hong Kong? | Hong Kong has existed semi-independently for a while with their own criminal justice system. But now, mainland China is trying to integrate them into their criminal justice system. This is a bad thing considering how corrupt it is. | a586992f-f6d6-465f-a6af-a8bae64ef5ba |
bztjhf | Do all wifi routers have both 5ghz and 2.4ghz wifi? | You would see a second SSID with a 5ghz label.
E.g. SSID = HomeInternet You would see a HomeInternet (5ghz).
Not all routers have it but most newer ones do. | 1981146a-70e4-4cc4-ab18-de9c417ffdd4 |
bztrp7 | What caused the sound associated with a balloon popping? | Sound is a pressure wave, when the balloon is inflated it had many times the normal atmospheric pressure. When you pop it, that pressure is released in all directions causing a sound wave | 30b46676-7275-41fd-93de-f36524a3e948 |
bzu1t0 | why does asphalt change colour? | It's a mixture or very black tar and aggregate rocks that might usually aren't black.
In the truck, it's really well mixed, and so when it's applied you see a nice, uniform coating. Over time, the softer tar is worn off and you see the rocks. If the rocks are grey, or worse white, this changes the overall color. | 371fb738-9b11-4e30-a7c5-0146f8044110 |
bzu5qz | Why is beef/red meat bad for the environment? | Basically to produce a pound of beef you need a lot more water and fodder than you do for a pound of chicken. Of course if you eat plants and water directly you of course need even less than if you use them to feed a third party animal. | 90aa22b6-788b-482e-9908-5b968fee0161 |
bzudkd | Why does minimizing some games increase GPU usage to 100%? | [V-sync](_URL_0_) - when playing, and this setting is on, the game's frames per second are maxed out at 60, which is the maximum that the screen can display. When minimized, certain games continue to render the screen animations, but no longer limited at 60 FPS - they go to the max that the video card can handle. | 53354563-90d9-4c7a-a289-d948a5bdb9c2 |
bzujk9 | Since Vitamin B12 is only found in animal products, vegetarians and vegans get it from supplements or cereals for example. But where do the cereal makers get it if not from animal products? | B12 is produced by micro-organisms. Animals get it from dirt, or supplements these days. The B12 for supplements is produced industrially, in the B12 factory. | 150df4b3-f44b-4a9e-a1ca-3854e8489082 |
bzuvqh | Is there a Trinity being taught in the Old Testament? | The trinity is christian doctrine and the old testament is pre-Christian. So no. And it actually did come into existence until almost 200 years later. | 58fabc24-b11d-4aaf-b4eb-69de6272397c |
bzuw6d | Why do select jurisdictions frown upon luring/baiting criminals and/or performing sting operations? | So the first issue is the concept of "entrapment" which basically says you cannot trick or coerce a person into committing a crime and then charge them for that crime. If an undercover cop tries to sell drugs to me, I refuse, and then he keeps pressuring me until I cave, that is entrapment. The problem with many "pedophile hunters" is that they cast a wide net, with no direction, and without proper training in how to identify and execute sting operations there is the very real possibility of accidentally creating false evidence.
Additionally it is a 4th amendment violation. | 7da16b30-f44b-4aa2-b4ca-a7374e413c98 |
bzv39k | How do we know so much about dinosaurs (Diet, form, etc) from just looking at their bones? | I asked a similar question a few months ago. My question was,
"Why do we assume dinosaurs roared? How do we know they didn't speak some sort of language" | 2bf1eab1-e101-42c4-9219-eac78bee366c |
bzv3xz | How does the tightening mechanism work on a hard hat. | I expect there are several different models of hard hat out there, so my explanation might not be of use to you, but with the ones I'm used to:
The head doesn't rest directly against the hard outer shell of the helmet but rather a mesh or piece of cloth connected to a ring around the outer edge of the helmet which is in turn connected to the shell. This ring isn't actually a closed loop but rather a strip of metal (or plastic) that is bent into one with the ends overlapping slightly. It is held in place by a knob that, upon turning, moves the overlapping ends further in one direction or the other, effectively changing the size of the circle. Think about it like adjusting a belt or wristwatch, only with a cogwheel instead of a pin and a hole.
Then there are also mechanisms to adjust the chin strap in various places, though they all operate on the same principle as most places where you adjust the length of a strap: The strap gets broken up into two parts, one of the parts gets directly connected to a piece of plastic and the other gets looped through said piece of plastic in a way that presses against itself to prevent accidentally moving. You can then adjust the length by pulling/ pushing the looped part by hand. | cd2266f2-b204-4989-8a6f-225807846011 |
bzw1oc | Why do customers at stores or restaurants seem to come in waves? | Could it be tied to non-traditional job shift changes (like say, a factory or hospital), schools getting out or some other regular occasion that isn't tied to 9-5 schedule? Are these mostly locals, or could it be people traveling from elsewhere, and your location is a certain # hours from a major city where people might all be leaving around the same time... ie. they're all leaving a major city 7 hours away at 8-9 am and hitting your location between 3-4pm | bfd3f46e-67e8-4573-a7d7-4c27916d7d1d |
bzwgxm | What is the difference between Hemp CBD Oil and Marajuana CBD Oil? | Hemp and Marijuana are cousins. Hemp contains more oil and very little THC. MJ the opposite. There for hemp oil is less expensive. That's about it. | b9aa5395-e5f3-4d12-8cf2-cbaeeb800dcd |
bzwt4k | How do carbohydrates turn into glucose? | So all carbs are chains that include carbon hydrogen and oxygen. Hence carb(on)o(xygen)hydr(ogen)ate. These are the basic blocks of glucose which is C6H12O6. So as carbs which are just complex chains of the base blocks of glucose get broken down and converted to glucose. | 02865d30-2518-4733-be75-58afb02ef9f8 |
bzwwq0 | why do people punch and hit things when they get frustrated ? | During fustration, anxiety, and stress, our body releases hormones that activate our fight or flight response. Notice that fighting or fleeing are both actions that we need to do and our body rewards us for doing those actions by releasing endorphins to cancel out the stress response.
This makes sense back in the days when we needed to fight off large predators or other immediate dangers. Our ancestors who fought off or fled from the predators tended to survive more than the humans that did nothing.
However, in the modern world, many things that stress us are not easily delt with. Issues like "how will I pay my bills?" or "what should I be doing with my life?" cause the same stress response but there is no easy way or fight or run away from it completely.
That is why taking actions like fighting an inanimate object makes our body feel like we're doing something and have control in those stressful events to relieve the feeling of stress. More healthy ways of dealing with stress involve exercising (effectively fleeing) or other physical activities (fighting) to manage stress. | e490886e-aae6-4367-918f-961d2bda686a |
bzx2ct | What are the Hong Kong protests about? | So up till 1997 Hong Kong was under the control of the Brits as part of a 100 year lease. In that time HK grew into a huge cultural and financial hub for the region. When China got it back they gave Hong Kong relative autonomy even though it is part of China now. People there have always lived in freedom and justice but in recent years China has slowly eroded that away - and this law for extradition scares the hell out of HK citizens - as it should. | 1645b17c-7064-42fb-b4e0-dfa792b16f12 |
bzx6z4 | Why do jury verdicts need to be unanimous? | Because we have agreed that to convict someone the standard they are held to is "beyond a reasonable doubt." That is an extremely high bar, and it is assumed that if as a juror you don't believe that burden has been met, then the person is not guilty.
Most civil cases don't require unanimous verdicts. The burden there is a preponderance of the evidence, which is a much lighter burden.. | 7152349c-eec9-4819-af72-5029bffc6528 |
bzx7fi | What’s happening in Hong Kong? | China trying to control Hong Kong like they do to the rest of China. HK knows what democracy is like and doesn't want to lose it under Chinese communist rule. | 00c288a8-7a7d-4425-b615-17890d24f1bd |
bzx883 | Why does anyone use kWh? Is it not better to say Kilojoule hour since watts are a derived unit? | Cause you would have a very big number and having another hour in the unit being stated would just be really confusing. | 30c14670-85f9-46ba-ae3a-f0a08ab8d946 |
bzxgrc | does the amount of virus you're exposed to affect the risk of getting sick? | Depends on the pathogen. Salmonella (a bacteria, though) requires 2-3 million active bacteria to infect you. Norovirus, the nasty little fucker, only requires 10-20 individual virus particles to make you wish for death. | b1d065ad-92d4-4928-9a8f-5998a36c8f35 |
bzxily | How can a half-built house be left in the weather with no issues? I’m talking about a wood frame with plastic in the rain type of thing. | Construction materials are typically rated to a certain amount of exposure to the elements to allow for construction time. Thats why construction scheduling is so important, so that sensitive things arent ruined before the building is up. Ive seen thousands of dollars worth of material discarded because it sat too long in a building that wasnt sealed
Wood framing can go quite awhile exposed before there starts to be a real concern. But it depends on climate and whatnot.
Source: work in architecture | ed3d6c78-42e5-4a69-99e1-0fca3752fc81 |
bzxytx | Why do barbershops have that spinning rod? | Back in ye olden days barbers were dentists, surgeons and doctors as well as cutting hair. The red and white poles resemble blood and bandages, by-products of their trades. | e170db8a-3eb1-435a-b303-0e6f6062905f |
bzy1lm | Why are people protesting in Hong Kong? | Because a new law will enable people to be taken from Hong Kong to China and tried there possibly on trumped up charges meaning that what limited freedom there is in Hong Kong will cease. | a586992f-f6d6-465f-a6af-a8bae64ef5ba |
bzygz4 | Do fast moving objects fall slower? | No, unless its motion gives it *lift.* A plane gets lift by having wings. A sphere doesn't. | 0bc0ce7a-44d8-4aed-b12f-613f6f311976 |
bzyk7k | Why is the difference in air pressure able to move things? (Ex. Close a door) | ELI5 pressure is force applied to an area. So if I have high air pressure on one side of a door and low pressure on the other side, the side with lower pressure will apply less force to the door than the higher pressure side as such the net force will push the door towards the low pressure side just as if you and a friend are each tugging on a rope, the person that is tugging "harder" will pull the rope towards them. | 5c146181-c3d1-4bbf-97a8-4a8e90c2c8ca |
bzys75 | Why do our bodies have so many "defenses" that are actually harmful or even potentially deadly? | The vast majority of the time they help keep you alive, just sometimes they don't. The body isn't intelligent, it doesn't know if something it is doing is detrimental overall. These are evolved responses, not intentional strategies. | bd82e5ad-d713-4521-bf73-b17d9b35b7e3 |
bzyuqe | The definition of Social Functionalism and Social Conflicts theories | Hello there!
Social Functionalism is, in my opinion, the easiest of the two to understand. The idea behind this theory is that every part of society is useful, or functional, and therefore are all important for the function of society. An example of this could be a car (a very minimalist one) where you have all sorts of components that are essential for its function, like the engine, brakes, etc. It is with all of these components that the car will work, but it will not work without unless all parts are present. In my sociology class, this theory was attributed to Emile Durkheim.
Social Conflict Theory is a little bit harder to grasp. The main idea of this theory is there is conflict over resources and inequality and these are what keep our social order. A ‘key’ idea from this theory is that people and groups will work for their own gain. An example of this theory at play is a bourgeoisie factory owner paying their proletariat workers hardly anything to increase their own gain. They are suppressing the lower class to increase their power and wealth. This theory is often attributed to Karl Marx. | b2302fb7-4b85-4a4f-a383-02dbddd96930 |
bzyzyj | What are the differences between cognitive and emotional empathy and how is it people with Aspbergers lack one of them? | You are wrong to think aspies lack anything. The best description I have ever heard is it is more like an overload than a deficiency. An overload to the point that you can't distinguish others emotions from your own. And so the mental coping processes they have developed over their life block out almost everything.
This question can't be answered simply because no one has yet to understand it fully. | 829a8d20-61f6-43fe-b04e-3ea05cac916e |
bzz5ke | Why when diffusing a bomb cutting all wire simultaneously won't work? I would imagine it would cut power to all sources. | Depends if the trigger circuit is NC (Normally closed) if you don't cut the spark/ignition source first and you break the trigger circuit first, which is normally a closed circuit, that wire cut will cause the explosion to happen.
Now your concept in a vacuum makes sense, but you cannot cut through ALL the wires at the EXACT same time, the blade severing the wires insulated or not, will vary as the blades cut through them, and one of the wires will be the last to break.
If the order in which the wires are severed isn't in the right order, even by a tiny fraction of a second, then the trigger circuit can be tripped without the ignition/spark source being dismantled.
That's why what you cut matters and in what order. | 095ba046-908e-40f9-ad35-2ed18d620fbe |
bzz7ad | What happens to stomach acid once food is ready to move to the next step of digestion? How does the body dispose of it without causing harm to itself? | If you mix an acid and a base, you get salt and water. Your stomach has hydrochloric acid. It also has a special lining that protects it from acid. Food and acid then goes from your stomach to the duodenum. There is another connection from your pancreas to the duodenum. The pancreas secretes a base called bicarbonate. This neutralizes the hydrochloric acid. | 03c3353a-02ba-4516-89dc-bedf578fba82 |
bzz7g2 | Where does the cliché that all police like donuts come from? | Back in the day and sometimes even now, donut places were the only place open all night, and cops need some place to sit down and take a break, have a coffee, do their paperwork, etc.
So it's not hard to see how the two might get relates on people's minds. | c08da162-62cb-43f2-ba26-f77c1b4388fd |
bzzhrt | What is the difference between „Bisexual“ and „Pansexual“? | Bisexual means attracted to two (bi) sexes. Pansexual covers the full spectrum of male, female, gender-fluid, trans, etc. | 3e4aab2b-faf8-438c-bbdb-f38c6be4e278 |
c001dk | What exactly happens during the process of making glass so it gets transparent? | When light is absorbed by a material, the electrons are struck by a photon and jump up one or more energy levels. However, it has to be struck by a very specific frequency of light in order to be absorbed. Most opaque materials can absorb a huge range of frequencies within the visible spectrum. Glass, however, cannot absorb any of the visible frequencies of light.
It's like picking up a ball (electron) and putting it on a shelf (energy level). You (the photon) can only reach up so high; if you can't reach, there's nowhere to place the ball (electron) except the floor (ground state). Since you didn't put the ball on the shelf, you didn't exert yourself (get absorbed), and could move on to find a different ball and shelf pair (atom). If all of the shelves are too high, you'll walk through the warehouse full of shelves (the material) without ever lifting a ball up, and someone will see you exit the other side. | 17ae6597-03b3-4b86-80e0-f0a9a390c234 |
c0040k | How does bluetooth work? | Think of two FM radios talking to each other where instead of hearing music and singing, you just have on and off sounds that represent 0's and 1's. These 0's and 1's are used to send data back and forth between little tiny radio stations that are within a very small distance away from each other. | 1e957486-3cff-4901-8645-83a7df8b2a72 |
c0051i | Why does hot weather cause power outages? | Air conditioning.
A/C uses lots of power - as anyone who lives in a hot climate can tell you. Collectively that sometimes means that more power is needed than power plants can produce. If demand exceeds supply... someone stops getting power. | e084fdbd-1dac-420c-a500-f75b5cbfa1ea |
c005k4 | Why does Coke push Diet Coke so hard? | Coke sells really well. Diet Coke sells less, so they're trying to increase sales and drive brand awareness. Also it's a company image thing. Diet Coke is falsely sold and percieved as being "healthy" so they want to make you think they care about your health. | e4629553-03d2-41ae-8ba5-836f614d715e |
c005pa | how come some foods taste good together but others don’t? | It's a matter of complimentary flavors. Sweet goes with salty and/or spicy. Combining acidic foods is generally not a good idea. You have to remember that your tongue can taste 4 main things: sweet, spicy, salty, and tangy. | e37f2c9f-cfd6-4f84-9677-1596856ca86f |
c00acb | Why haven't humans connected the Bering Strait with road or rail? | That bridge would connect Siberia with Alaska.
Neither territory has the population to justify the cost of building the bridge.
People in the US wanting to send things into Russia or beyond (and vice versa) wouldn't send it the long way around by truck anyway.
They'd put it on a boat or a plane and just go more or less straight.
And there isn't really a highway leading from the region around the Bering Strait in Siberia to anywhere in Europe either. | c0ee6dbd-2e22-4e26-ad47-5942ec4311d2 |
c00cne | What is a box spring for? | For bed frames that do not have supports across the middle.
Some bed frames are just the outer rectangle connected at the head, foot and maybe once across the middle. Set a mattress on that by itself and when you sit on it it'll push through the frame. Putting a sturdy box spring on it first prevents that.
If you have a platform bed frame or bed frame with sufficient support in the middle then a box spring is not necessary. | c2013029-c48b-4674-beff-223413cbcaad |
c00dwx | why is it easier to recognise things that we know than recalling them? | If you're given a list of names to choose from, and one is correct, you can basically do process of elimination to get rid of any you don't recognize, and any you *do* recognize, but you know aren't the right name.
The flip side of that is similar in process. Your brain says "do I recognize this thing?" So you'll know if you recognize it, or if it's new.
To recall a name on your own, your brain has to make an extra connection from the face to the name. If you have a list to choose from, that extra connection is done for you.
Some connections are stronger than others, so it might be easier to recall one detail over another.
For example, think of an actor/actress you've only seen in one or two roles. I bet you can remember their character's name easier than their real name.
Now think of a super famous actor/actress who has been in films for like 15+ years. I bet you can remember their real name better than the name of the characters they played. In this scenario, you've had more opportunities to make connections to their real name than the name of one specific character. | 9eb48634-31ae-45dd-b563-6dcf02df3dd7 |
c00i38 | Where does all the dirt from power washing go? | It's floating in the water kicked off by the power washer.
It then usually flows with the water down into the drain. | d03e5a63-35ec-49ea-9872-727596ce6c32 |
c00q5l | Why are there no rip off car models as there is with so many other products in the world? | There are, they might not rip off the entire car, but components; door latch assemblies, window motors, smaller pieces like that get ripped off all the time and designs get copied. | f45b0886-068e-4e22-b93b-a000353eddf0 |
c00twy | What is happening in Hong Kong right now, things look absolutely terrible! | The people of Hong Kong haven't been officially fully a part of China for over a century.
China wants it.
The people don't want to be a part of it. | f27ec814-3f9d-4421-9f37-982bd7458e59 |
c014g6 | How do computer components work? | A lot of really small electronic components controlling electronic currents. Binary works in 0s and 1s which is pretty much current or no current, this all happens rapidly in vast amounts to get the end result of a functional component | 798f20f0-6787-417a-b18d-f57720b6eaa6 |
c01f5u | Why do publicly owned companies buy back their own stocks? | A company buys up and retires shares of the company on the stock market.
Let's say there are 100 million share of XYZ Co. The company buys up 10 million of them and retires them. Now there are only 90 million shares outstanding.
But the company still has the same earnings/profits, so their earnings per share increase. And since the company's growth and prospects, etc. haven't changed, their P/E (price/earnings) ratio should stay about the same. That means that the price of the shares should increase to reflect that higher P/E.
What companies were doing is taking money that would have previously gone to pay taxes and instead used that money to reduce the number of shares they have outstanding, and that made the remaining shares worth more.
It's like you had a pizza and cut it into 10 slices, and then replace it with same size pizza cut into only 9 slices -- now each slice is about 11% bigger. | 6c2c8a02-7893-4356-bef3-ce417ad51338 |
c01j2w | why when trying to fall asleep your body does like a "fake fall" and reacts to it. Why and how does it happen? | It's a thing your body evolved to prevent you from hurting yourself in your sleep by moving around. The common reason for that "falling" feeling, is that at one point, we slept elevated for safety (like in a tree) and the people who *didn't* jerk awake in their sleep might not have lived long enough to reproduce. It's anecdotal, meaning we can't know positively that was the reason, but it's the most reasonable reason we have to explain why we have that "falling asleep" falling feeling.
_URL_0_ | 0de4c324-86dd-42cf-89b1-9c8fb1375a29 |
c01og2 | How do animation movie studios sync voices to animation? | The easiest way is to record lines and then animate the characters to the voice. They do it this way so that the actors don't need to worry about matching any of the visuals.
In a lot of animation studios, they actually film the voice actors recording the lines and give the footage to the animators. If you watch a video of Robin Williams recording lines for Aladdin, its easy to see how his acting had an effect on how the Genie was animated. | 55824957-edf7-425f-a64b-575793f1915e |
c01rcs | How do Americans pay for those ridiculous medical bills? | They declare bankruptcy. We are drowning in medical debt and student loans, and people wonder why there is an opioid crisis. Before declaring bankruptcy, they try to get help from friends and family through crowdfunding. It’s abominable and tragic. | 10095b5f-71ce-4184-abe8-d6eea37162af |
c01rk7 | Why are fusion reactors hotter than the sun? | The pressure in the core of the sun is around 265 billion atmospheres and 15 million kelvin.
The energy output of the sun per unit of volume is low. In the core the sun generate around 276.5 watts/m\^3. A human produce approximate 100W but have a volume below 0.1m\^3. So the thermal output of a human is approximate 1000W/m\^3 or around 4x the core of the sun. The sun have the same energy output compared to the volume as a active compost heap
The density of the core of the sun is 150 g/cm3 that is 150x the density of water and humans. So per unit of mass humans generate 600x times more heat the the core of the sun.
A regular nuclear reactor is around 1000 MW and so you would need 1\*10\^9/276=3.6 million cubic meter. That is a cube with sides of 153 meter that would not be any way practical to build or to keep at the required temperature and pressure.
So even if you could create a reactor with the temperature and energy output as the sou it would not be practical. The sun produce a lot of energy because it is massiv not because it is efficient.
& #x200B;
So we like more power output per unit of volume and mass then in the sun
If fusion happen depend on [Lawson\_criterion](_URL_0_) depend on the density and temperature. The density depend on the pressure.
There is laser compression ides like in the [National\_Ignition\_Facility](_URL_1_) that create pressure of 300 billion atmospheres and temperature of hundreds of millions of degrees.
The more common [Tokamak](_URL_2_) with continual operation have lower pressure higher temperature then the sun. ITER will have 100 million degrees Celsius plasma and many have resurs of millions of a atmosphere. | 86d76c53-cf0c-49f4-8a0b-bac3d95522d4 |
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