query
stringlengths
8
249
answer
stringlengths
45
7.8k
Why do chip bags and snack cake boxes have a price listed on them and other foods do not?
It should be noted that in many cases chips and snack cakes are a "vendor item" in larger stores. This means that they are managed and stocked by the company instead of the establishment that is selling them. The vendor does not often have access to the stores signage equipment. In the spite of efficiency it is better ...
Why does something like a smoke detector have a huge tariff than a musical instrument when shipping to some place outside the US?
Long story short: with enough smoke detectors and a bit of knowledge you can build a nuclear reactor or "dirty bomb". It makers it easier to track and prohibitive for those, who might give that a shot.
Difference between 2chan, 4chan, 7chan, (8chan), prochan, and Reddit?
2chan is the original image board of your selection. It is very similar to the others except that, instead of English, it is in Japanese. 4chan was created when a guy called Christopher Poole thought there needed to be an English-language version of 2chan. 7chan is um I'm not sure what it is. 8chan is like 4chan but yo...
Why are breasts often considered sexually attractive and private?
Breasts are a sexual characteristic of human females. Other mammals only have breasts when breast feeding, otherwise they are small and look the same as the male breast of the species. Scientists are still trying to work out the specifics, but the attraction is thought to lay in something about youth , nutrition or sim...
To what extent would a person have to manipulate an audio sample to avoid copyright infringement?
A copyright needs to be: Recorded Original to the author And of sufficient length to constitute a work What you're asking is about the third part. And it's decided on a case by case basis by the judge, though I do believe in music precedents have been set.
How do passenger airplanes that can carry hundreds of people and a lot of luggage/weight work?
Safer than driving! While one plane crash may, in fact, injure & kill a large number of the passengers on the flight, the number is still far, far lower than the number of people killed daily in automobile accidents. Per mile traveled, driving in a car is at least ten times more dangerous than a plane. How do they work...
Why does your belly stick out more when you get older?
There can be several reasons * fluid build up in your abdominal cavity * slower metabolism causes fat build up* loss of skin elasticity * muscle degradation in your back and abs cause poor posture
How do emails detect "spam" and send it straight to the "junk folder" but allow some emails come through to your main inbox?
There are numerous ways to identify spam . A lot of spam is identified before it is even accepted by the mail server. A mail server always knows the IP address of the server that's trying to send email to you. The first line of defense is to refuse to accept email from places that have a bad reputation. Your ISP or ema...
How different is State of Lawlessness to Martial Law?
Pretty much sort of opposites. Ordinary civil law exists in a society with police and courts. Everything is orderly. Police make arrests, put people in jail. They are tried in a court of law. On a battlefield there is no civil law. US soldiers operate under a universal code of military justice. Crimes can occur and sol...
Why are people in the US allowed to open credit cards under their children's names?
They are not legally. When people do this it is identity theft and they are acting as though the child is 18 and filling it out on their own.It's a huge grey area. While many consider it identity theft, I was a massive victim, but the courts upheld the debt as legitimate because I was underage when the lines of credit ...
How is a coat hanger able to pick up radio waves when replacing the aerial in a car?
The aerial is just a fancy coat hanger. "Radio waves are a type of magnetic energy generated by a transmitter and a transmission antenna. The antenna on your car is built to pick up the magnetic energy of the radio waves and send it to the car's radio receiver, which in turn isolates and amplifies the radio waves you w...
How do blind people shop?
In much the same way as anyone else. What specifically are you asking? If you mean "How do they know the difference between coins/notes/bills of different denominations?", then most countries\' coins are distinguishable by touch by being of different sizes and having milled or smooth edges. Notes/bills of most countrie...
What is happening when one stutters?
I don't remember where I read it , but some psychologist did an interesting experiment. He made stutterers talk while wearing special headphones that cancelled all noise, so they couldn't hear themselves. Interestingly, they stuttered much less . This showed that the stuttering was caused by the way their brains were p...
Where did the saying 'The camera adds 10 lbs' come from and is it true?
It mostly has to do with the focal length of the lens and how much distortion it has. A telephoto lens with low distortion will create a flattening effect. A relatively wide angle lens that you would see on an entry-level DSLR or point-and-shoot will have much more barrel distortion and can create a fattening effect un...
why the US immigration system is so damn complicated
Despite what the media says, no country will just allow anyone in, there has to be a selection process. In reality it's much harder to immigrate to other countries and some countries outright discourages immigration. You might be thinking of within the EU citizens of member countries can travel and work freely, but if ...
I love to take naps but why do you usually feel terrible after one?
I never feel terrible after a nap. You might be sleeping too long. If you nap too long, you can get into a deep sleep cycle. If you’re forced to wake up before you come out of that, say by an alarm or noises in the area in which you are napping, you’re going to feel terrible because you got pulled out of deep sleep. Fo...
If the camera lense is circular, why is the picture square?
Because the film's square. Or rather, rectangular. And why is film rectangular? Cause it's easier and more economical to manufacture than circular film. The image created by a lens is actually circular. The picture you take with a camera is "cut out" of the center of that circular image. You can see this if you put the...
What is Non-Euclidean geometry and how is it different from Euclidean geometry?
Non-Euclidean geometry isn't just one thing: Euclidean geometry is defined by Euclid's original postulates. For example: If 2 lines are intersected by a 3rd, and their corresponding angles add up to 90 degrees, the 2 initial lines don't intersect . If you change these postulates, then you are dealing with non-Euclidean...
Why do our voices always sound weird from a recording?
It's mainly due to the fact that you aren't hearing your voice from inside your head, which tends to be deeper and more resonate. Your voice in a recording sounds more like what other people hear, and it may sound bad to you but it isn't that your voice is "bad", it just sounds different from what you are used to.
Why do the hours of daylight in a year not correspond strictly to latitude?
[Technically, it does]. But yes, topography does make a difference as well. However, these maps are measured with a device that measures sunshine ). However, this is impacted by factors like cloud cover. As a result, places that experience clouds would have more sunlight. Depending on the location, seasons may also hav...
What are the psychological ramifications of transplanting someone's head on someone else's body.
I'm pretty sure he'll be okay with it since he has/had to give consent for the procedure. Any psychological issues are probably mitigated by that conscious choice. However, if they did it *without* consent, I'd be worried if he *didn't* freak out.
What made the Spartan Soldiers such a formidable force?
On equal terrain and footing and alone? A Spartan might be worth 2-3 Persians at best. In formation, fighting with his buddies? Its more like a 10-1 plus ratio. The Spartans had a number of things that made them so strong. First, they were trained. Most armies of the time were made up of a small core of professional wa...
Why do we still do daylights savings and then revert back? What benefit does it have to in our modern world?
It is also worth noting that, at this point, removal of daylight saving time might be just impossible. For a start, most software would need to be updated over the course of roughly half a year, because current versions use libraries that take DST into account. The consequences of not updating those could be as trivial...
Why are noises during the nighttime infinitely more scary than during the daytime?
Probably because as a child, we're conditioned to fear the dark, whether it's through stories, movies, or whatever. And also, because at night, you have no idea of knowing what those noises are being made from, without actually going to look, so it could possibly be a fear of the unknown kind of thing.
Why are some pitches (often in the bass) "louder" than other pitches?
There absolutely is an explanation! Your ears have evolved to be attuned to specific pitch ranges. While they *can* hear low pitches , they are more interested in hearing higher pitches, specifically right around human speech. Your pinna resonates in that pitch range; your ear canal resonates in that range; your bones ...
Dreadlocks. Brief history and why have them?
It's a hairstyle. I don't really think there's much more than that to be said. Some people like particular hairstyles, some people don't. It's just a matter of fashion and personal preference.
Why do people still gamble illegally?
Other reasons besides those listed. You gamble daily and don't want to drive 50 miles to place a bet. Also you can't place bets over the phone. You have to go in person. Your bookie has better odds. And the biggest reason of all when talking about "placing bets with bookies" is you are generally referring to sports bet...
The differences between a traditional bank and a credit union.
_URL_0_ That addresses the structural answers of your question. _URL_1_ That one gets into a bit more of the difference to you if you're considering using one or the other in your personal life.
Why does it become more difficult to sleep when you are severely sleep deprived?
The other guy's answer is pretty spot on. I would just add that it also depends on what's keeping you sleep deprived. If you're stressing out over homework, like in college, you have adrenaline, and stress hormones keeping you up, which suppress parts of your sleep system. Caffeine is chemically helping, and things lik...
Why I see a glorious and massive moon sometimes, with my eyes, but when I go to take a picture, it just looks like a tiny minuscule dissapointment?
One's perception of the size of the moon is heavily influenced by 'context clues', or other nearby structures. It's a bit of an optical illusion to say that the moon ever looks significantly larger or smaller. When you take a picture, you lose many of these context clues and your brain interprets the picture differentl...
Why is it easier to balance a moving bike than a stationary one?
Rotating objects have angular momentum, which makes them want to stay rotating in the same plane they're in. So a rotating wheel has some inertia which helps it stay upright.
How do parrots talk if they don’t have vocal chords?
They push air through their trachea, and change the size and shape of the hole to change sounds.Whisper the sound Tee. Now try to whisper the sound Dee. They sound pretty much identical, don't they? This is because your mouth and tongue are doing the same thing, but when you whisper, you can't use your vocal cords as y...
how do companies make money from gift cards sold at other stores
Card industry veteran here. The incremental cost of production and distribution isn't very high, a few cents per card. The point of sale retailer gets a small % of face value or a fixed $ amount. Motivation for the card brand retailer is threefold. 1) They lock in the spend - I will shop at Target not Walmart next time...
Where does the sound from humming come out of?
The sound is produced from your vocal cords , just like your normal speaking voice. Instead of forming your mouth and using your tongue to make words, though, you just get a very simple tone. The air that you are pushing through your vocal cords escapes through your nose , and I'm sure that a fair amount of the sound e...
What is the purpose of paratroopers in warfare?
> but why are those soldiers being thrown from planes? For mobility. If you need to get troops somewhere RIGHT NOW and you don't have time to send them by sea or land, sending them by air provides another option. Also, maybe you want to attack a location behind enemy lines. One famous example was D-Day, when the Allies...
; Why global warming is based on facts.
They can look through ice layers and see changes in chemical composition of air/water.It doesn't have to be before recorded history. We have noticed the average temperature of say, the ocean drop by a degree in recent years.
What exactly is THC doing to my brain?
THC mimics a natural neurotransmitter in our brains called anandamide. Anandamide is normally responsible for boosting memory and learning, dulling pain, and stimulating the appetite. Typically, anandamide and dopamine partner and work together to control different pathways and other things as needed. However, even tho...
How can gambling be illegal in US States that run a lottery? Isn't the lotto just state-run gambling?
Perhaps unsurprisingly, when you are the body that makes the rules, you can make exceptions for yourself in those rules. Lotteries were made illegal for a time and there is no national level lottery. However, many jurisdictions have made government lotteries legal again. There's no requirement for the government to wri...
With all the droughts happening worldwide, where is the water going? It's still on earth so where is it?
It's not actually disappearing. It's just going elsewhere. While California has been having a horrible drought this year, my state of Indiana has been getting so much rain that it's killing crops.
Why do worms always end up all over the sidewalk after it rains?
Actually, they can only move across sidewalks when it's damp, otherwise they dry up and die. The ones you see are the unlucky ones that get caught when the sun comes out. They don't drown when it rains.
Why do we have to "press start" in the main menu of most of the video games ?
To confirm that you're ready. What if the game just started and something came along and killed your guy?", '[According to this article] on console games it is sometimes used to identify the player. Even with a single player game, if multiple controllers are signed in, it must identify who is the person who will be pla...
What is the crisis of masculinity?
It has to do with guys growing up feeling like the rules and culture of society are stacked against them . Whether they are or not, it's debatable, but the key point is that many guys feel this way. The concern is, this could lead a lot of guys to become anti-social This can lead to a lot of guys not courting women, no...
What exactly is meant by "the math breaks down" when talking about general relativity and quantum mechanics?
When you do quantum mechanics in the obvious way, you get infinity as the answer to a lot of problems where the right answer isn't infinity. There are special tricks you can use to get around this normally, but the tricks stop working if you try to add in general relativity.To add to what /u/Amarkov/ said, "the math br...
Why is there such a thing as ‘check-in’ when flying?
The airlines want to be able to fill every seat. If they make a rule that says you have to check in, and people don't check in, they'll sell your seat so that the plane stays full. It's more profitable for them to do this.The airline needs to know that you are actually at the airport and committed to boarding the fligh...
What turns human genes on or off? What reaction results thereafter?
The specifics are incredibly complex and full of word salads like the names of transcription factors and genes. On a broad theoretical level, it's very simple. The genes can be physically blocked using certain "labels". Once these labels are put on, the gene is tightly coiled up and in most cases permanently. For examp...
How are we able to control the flight of objects we send to space?
An object in motion stays in motion, unless it is acted on by another force. So, if you push something in space, it will generally keep moving in that direction. The gravity of near-by stars and planets will effect the direction and speed, but other than that you're home free. Want to go towards Mars? Do the math for g...
Is it realistic in movies where someone gets shot and doesn't realize until they see the wound? Wouldn't they notice immediately from the pain?
There have been plenty of instances where, when someone's in battle, their adrenaline levels are so high that they might not notice a grievous injury. Like, my grandfather told me about one of his friends in the Korean war who got shot in the leg, and didn't notice until hours later. Another guy who was in Iraq with a ...
Why do Pizza places typically sell Pepsi products?
Aside from restaurants that are part of the Yum brands umbrella of companies. In general, Pepsi sells their syrups slightly cheaper than Coke. Since people don't typically pick the restaurant based on the type of soda they serve, there's no reason to serve coke at a restaurant.
Is it possible for another planet to be on the exact opposite orbit as Earth so we technically would never see it?
You mean to be hidden by the sun? It would, but it's gravitational influence on other celestial bodies would give it away. In other words, it's not necessary to actually *see* a planet to detect it's presence. Most of the outer planets were, in fact, *predicted* to exist long before they were actually detected with tel...
If the Devil is such a bad guy, than why would he punish people for sinning?
In many traditions, he doesn't. He's in Hell being tortured along with all of the sinners. In other traditions, he's just an overall angry guy who will torture anyone. People in hell are just convenient. In jokes, he's usually a real nice guy, until a punchline ending in sex with Bill Clinton.
The difference between MP3, V0 and FLAC audio files.
Music files on a CD are pretty big. FLAC and MP3 are both ways of compressing the files down to a smaller size. FLAC's output is bigger than MP3's output because it sounds exactly like the sound from the CD; no part of the sound was taken away at all. MP3 can get smaller file sizes because it does take away some part o...
Why do cleansers (or other products) label that they can remove "99.99% of germs" as apposed to 100%?
Yep, pretty much. There will always be that *tiiiiny* percentage of germs that the sanitiser either missed or somehow had managed to survive the sanitiser. So to cover their legal asses, companies that make hand soaps/sanitisers say 99.99% rather than a full 100%', "There will always be some bacteria that resists. If t...
how does spicy food clear up your sinuses?
It's an allergic/inflammatory reaction. Just like when you have a cold, your body flips and goes "there's stuff in our mouth/throat/nose, get rid of it!" So to do so it pushes put this thick mucus to collect everything and get it out of you. When your sinuses "clear" it's like your nose vomiting. It wants to dump it's ...
Why do we normally say God/Jesus vs an actual name like Yeshua or Yahweh?
You say God because you are not suppose to say the name of God in Jewish, Christian, or Islamic doctrine. Instead we designate them a deity or we call them "Lord
What is the National School Lunch Program?
It is a federal program that provides subsidies to local school districts so that kids who couldn't afford to eat are able to do so. The idea is that if kids are malnourished or hungry they won't be able to learn or develop effectively. it was also devised as a method to bolster staple food prices in the agricultural s...
American keg parties *AS SEEN ON TV!*
At the parties I've been to there were multiple kegs. Also, is 10-11 pints of beers in one night really normal for you?
How come the percentage of left handed people is so much higher in the MLB than in real life?
Left-handed hitters are a couple of steps closer to first base. Left-handed first-basemen have their glove hand in a better position to catch pickoff throws. Left-handed pitchers have a better view of the runner on first.It gives them an advantage - right-handed players will be used to playing against other right-hande...
If psychological projection is a thing, why do (some) depressed people see everyone else as very happy?
as per Google: > "Psychological projection is a defense mechanism people subconsciously employ in order to cope with difficult feelings or emotions. Psychological projection involves projecting undesirable feelings or emotions onto someone else, rather than admitting to or dealing with the unwanted feelings." By consid...
How do nuclear bombs work exactly? How do the ones we have now differ from the ones dropped in Hiroshima and Nagasaki?
They all work on the principle that matter is an extremely concentrated form of energy, described by the equation e=mc^2. Multiplying the mass [m] by the squared speed of light [c], a huge number even when not squared, gives a vast amount of energy. The mass of a dime, roughly 2 grams, would equal enough to run a stand...
how does airplane traffic control work? How does a plane that's been delayed for 4 hours manage to leave on time when it arrives at the next airport?
You've asked two completely unrelated questions. 1) How does air traffic control work The very basic answer is that it works by following set procedures. If aircraft 1 is at point A, then aircraft 2 is told not to go past point B until aircraft 1 has reported that he is well clear of point A. All the different points w...
Why is it that cracks seemingly spread on their own?
Because of how the mechanics of the crack work. The stress in a material is related to the radius of corners, that is, rounded corners, like the bottom of the letter U, have less stress than sharp corners, like a V. Sharp corners are actually referred to in mechanical engineering as "stress raisers". And what's sharper...
How celebrities, with their closely guarded contact info, contact each other.
Assuming they didn't give it to each other in person, they can go through a third party, like two agents talking to each other, or a mutual celebrity friend.They meet each other and exchange phone numbers They know the numbers are correct because they personally exchange themThe exact same reason how you know its your ...
What is actually happening when, after a day in the ocean or riding rollercoasters, the body will almost simulate the feelings when you're staying still?
There's a few reasons why this happens, and it's actually been a source of contention for centuries now. This is part of where the term "Sea Legs" comes from. When you are on a boat, or a roller coaster or other similar behaviours, your brain, vestibulocochlear system and muscles all grow accustomed to that environment...
Why do animals shed fur all their lives, but when you make a fur coat, it doesn't shed?
Because fur on an animal works like hair on a person - it grows and sheadding is a built in way to keep it clean and maintained. Along with grooming habits like licking. A fur coats fur does not grow, as a fur coat is not alive. And the skin has been treated to retain the fur as much as possible.Some animals shed a win...
How does ISIS conquer so much territory with such a small military?
Nobody has a sense of home. Nobody has a connection to where they are. Instead of resisting ISIS, people flee. The civilians have nothing to gain by fighting back and everything to lose. People's lives are in such disarray that they fold very easily to radical groups like ISIS. For example, if a group like ISIS tried t...
Tons of candy bars advertised everywhere in the 1990s. Now, you barely see anything advertise, but the products are all still widely available. Why?
For TV ads, it could be partly what you're watching - if you were a kid in the 90s, and the candy companies target shows that kids watch, the amount of advertising might not have actually declined, you personally just see less of it.
Why do we enjoy certain foods in adulthood that we hated as kids?
Adults actually have less taste buds than kids, so something bitter, for example, will have a more intense bitter flavor for a kid than an adult. And sometimes you just learn to like something after trying it a bunch of times.Your tongue and your cravings both adapt with age because you have different nutritional needs...
How do you tell apart ADP (Avoidant Personality Disorder) from SAD (Social Anxiety Disorder)?
Those with Avoidant Personality disorder typically do not have the insight to see that their avoidant behaviors are problematic or atypical. Personality disorders are largely inflexible. Those with Social Anxiety desire to be more social, but have significant difficulty and distress doing so. They have the insight that...
why youth unemployment is so high in Europe?
The system in Europe is more toward once you are in, it is hard to fire you. Basically it is just like government jobs in America. Also Europe is on the austerity bandwagon which has hurt heir economy. Recession hurts the youth because of their lack of skills. For comparison youth unemloyment in america is around 20%.C...
how is red meat carcinogenic to humans?
1) It is not all of a sudden. They have know it for decades. 2) It is not in moderation where there is a risk. It is when you eat massive amounts of it. 3) And it was only confirmed for processed meats, and suspected with red meatsWhat the World Health Organization said specifically said was this: > Each 50-gram portio...
In TV/movies, when someone snaps another person's neck, how is it done so the actor doesn't get hurt?
Often it's done much the same way as an on-screen strangulation -- for safety's sake the actor playing the victim is in full control. The actor doing the killing has their hands in the position required, and the one being killed turns their head themselves. They'll have likely practised with the other actor in order to...
Why does my Chromecast, which is 4 feet farther than laptop from router have 100x better connection and stability to the wifi?
Newer tech possibly, ive run into the same scenario with ps3's. I had a 2008 ps3 the larger bulky model and a 2013 slim and from the same room the newer model had 100% stability and the other 60%. So it's so much about distance resulting in signal degradation since you're in a home, in the same room, but more about the...
why are all the "ethnic" foods at trader joe's names similar to joe (ex. Giotto) except the Chinese food (Ming)?
Because they wanted to choose a Chinese name that was easy for Americans to pronounce, and Ming is one of the absolute easiest onesIf Americans were more conscientious of ways to pronounce things in other languages, they probably would have called it Trader Zhou.
Why are some people ticklish at some spots while others are not?
A lot of it is purely psychological. I read a research paper in college that said ticklish people tend to be less stressed and happier. I'm certain there are biological elements too, but I can't really speak to those.
Why do ISPs offer such lower upload speeds compared to download speeds?
Most of the broadband internet in the USA is cable. When cable TV was first introduced it was one way only, the cable company could only send information to your house. Later on it was decided that it would be a good idea for cable boxes to be able to talk back to the cable company . Since it was introduced later, they...
Why does a battery's storage capacity decline over time?
Over charge cycles and due to external factors like temperature, the batteries begin to have wear and tear. Every time that you charge the cell, an electrical current pushes lithium ions from the battery’s cathode to a graphite anode. When you turn on your device, the lithium ions flow in the opposite direction. With e...
Why do we "cry" when we go from a relatively warm place (house) to a colder place (street)?
Your eyes have two defences when they sense something is wrong: close, cry, or both. When you walk outside from a warm house, the fluid covering the front of your eye evaporates or dries really quickly. The nerves in the eyelid determine that the eye is in distress, and so your tear ducts begin releasing tears to lubri...
To whom does the U.S. owe $18.1 trillion dollars to?
People who buy US treasury bonds. About 1/2 of bond holders are American. Japan I think is the largest non-us holder with 9%. China holds 8%. Go buy a US treasury bond, and you to can be owed money by the U.S65,6% of the US debt is held domestically, the other 34,4% in foreign hands. On the domestic side of things, 16%...
How does Oral Rehydration Therapy Work?
Water follows salt in the intestines. The reason why ORT works better than Gatorade is because Gatorade doesn't have a lot of salt but has a lot of sugar, so while you're drinking a lot of water it can't in the body. The sugar and salt in ORT go through the same channel in the intestinal lining. When this salt gets abs...
I don't get this pynchonian "chinese joke".
Sometimes chinese jokes make more sense actually, you know, in chinese lol there are a lot of nuances and tones and wordplay we might be missing from the english translation, so the original text would probably help. source: am chineseSounds more like a moral story than a joke to me. Sort of warning to be ware of the p...
What's the EU commission's problem with the planned German road charge? The charge would *bring justice*, not the opposite.
Do other EU countries charge road tax to German nationals when they are visiting and using the roads?Probably because motor vehicle interests are scared stiff that countries will start to actually charge people some fraction of the costs of roads and they want to nip that idea in the bud and keep the subsidy flowing.
region locking on games and DVDs.
Imagine you have two friends. Bob is very poor, and can only afford to spend one dollar a week. Bert is very rich, and can afford to spend a thousand dollars a week. RegionLockGames bring out a new game. They could put in on the market for one dollar, and both Bob and Bert would buy it, making them two dollars. Or they...
How are sounds "different"?
The waves are different shapes. Some waves have a sharper attack or a longer decay , for example. Square waves sound different than sine waves or triangle waves or sawtooth waves.
Why is Marxism viewed with such hostility by the West?
At the most basic level, it's because Marxism is 100 percent incompatible with capitalism. In fact, Marxists explicitly seek to abolish the capitalist system of production entirely. So, it stands to reason that a capitalist state wouldn't look fondly on Marxists who want to wrest power away from the ruling class.Karl M...
Why do emotions sound musically the same to all humans?
In a lot of cultures, particularly Western cultures, music that is played at fast speeds and in a major key sounds happy and music played at slower speeds and in a minor key sounds sad. Music which is fast and played in a minor key or slow and played in a major key is generally considered to be emotionally ambiguous or...
Why aren't noise cancelling headphones as effective in cancelling high pitch sounds as their in cancelling low pitch sounds?
The way noise cancelling works is that it has a microphone pick up some noise and then a speaker produce that noise phase shifted 180 degrees. The resulting waveforms precisely cancel out. However, the microphone can only pick up the noise as it's passing by and there's a delay before it can generate the phase-shifted ...
What is a descending projection
If I remember correctly, it's referring to neurons. The cell body of neurons is in one location, and their axons stretch out to other brain areas. These stretched out bits are called projections, so a defending projection would mean that the axon stretched downward to a lower part of the brain.
How sometimes people don't feel that they've been cut?
There's nothing at the injury site itself that hurts. It's all in your brain. Nerves at the site of the injury send signals up about what's going on, and then the brain sorts it out. The brain actually integrates a ton of information very quickly, including memories of past "pain" signals in particular locations and th...
how do currencies work? how do we know that 1USD=114.1253JPY for example?
In *theory* , the exchange rate will reflect purchasing power parity . So for, example, if 1 apple costs 1 dollar in the US, and 1 apple costs 114.12JPY in Japan, then the exchange rate will be 1USD=114.12JPYCurrencies work much like buying and selling any other commodity. The exchange rate usually depends on the price...
Probatio diabolica or "Devil's proof."
You can't prove a negative. For example, you can't prove that ghosts don't exist, because you would need to check every point in space at every point in time and show that there isn't a ghost there, which is not possible. Since you can't prove they don't exist, anyone who says they do needs to prove it, because that wo...
Why does only one of my nostrils get stuffy at a time?
It's not just stuffiness that gets passed back and forth that way. At any given time, most of what you're doing with your nose - breathing, smelling, et cetera - is only happening, by and large, in one nostril at a time. This "load sharing" behavior is designed to give the mucous membranes and cilia a break every now a...
Why is it perfectly normal to walk on moving escalators but when they are not it feels super weird?
In one regard, an escalator's steps are taller, and spaced differently than we are used to on a staircase, so this alone presents some unusual sensation as we advance. Additionally, it is theorized that we adapt to moving surfaces like airport moving sidewalks and escalators, with the expectation of their movement. Whe...
Why does the photo uploader black out the license plate?
I believe this may have started in the UK. In Britain, for many years it was simple and legal to walk into almost any garage and order a license plate with anything on it you liked. You didn't have to prove you owned the vehicle in question, you didn't have to give your name or address or anything. Then the police star...
Are humans the only species that derives pleasure from watching other members of the species have sex?
No, there are other primates who show interest in it; there are primates, for example, that trade food for the opportunity to look at pictures of genitalia of the opposite sex. Can't recall the species, though.
Why my employer-provided health insurance premium just increased 300%
I'm assuming you're in the US. The Affordable Care Act means that health care providers can't restrict people in more at risk situations from receiving affordable care. However, to actually still turn a profit, revenue across the board has to go up. You can't simply add these people into the minimum revenue section and...
Why do pirates use torrents and not just upload the whole game file instead
Imagine you want to get a jigsaw puzzle your buddy has. So he makes a copy and mails you a piece one at a time until you have the entire thing. You get there in the end but boy it takes a good amount of time. And if your buddy gets bored and does something else your shit out of luck with half a puzzle. But this time yo...
What $15 minimum wage will do to the overall economy. Along with that what could it do to an employee that makes ~$20 now?
Well this is a very long and wind question I'll try to give a few of the Pros and Cons. This is a very current issue and causes great difference between Republicans and Democrats **Effect on the Overall Economy** Pros + Some people will get an increase from the minimum wage to $15 + This new given to wage to employes w...
When you drop a ball spinning it like a top, why is it spinning the opposite direction after it bounces?
For the same reason that balls bounce in general. When you drop a ball without any spin on it, it begins to compress when it hits the ground. It eventually ends up compressed enough that the momentum of the drop is canceled out, at which point it begins to *de*compress, causing it to rebound upward. Well, when you have...
How did western colonists get third world countries to enter the western economic system, when they were doing fine without it?
Imagine you live next to a river, and there are big rich beds of clay everywhere. Your mom teaches you how to make jars out of clay, just like your aunts and like all your neighbors do. It's easy: the clay is everywhere, and making them is so easy you could do it in your sleep. The problem is there's nothing to put in ...
In music, what's the difference between 2 artists working together "and", and when they are just "featured"?
And implies they were both involved in the creative process, lyrics, rhythm, etc. Featured means that one is the primary creator, and just needed a second artist for one reason or another. A male rapper wants a female to do one of the verses he wrote, she's featured.