query
stringlengths
8
249
answer
stringlengths
45
7.8k
Why high schools go to school earlier than middle and elementary schools.
I think often it is to share the busses. So the busses take the high school kids to school and then they are free after that to take the elementary kids to school. Same thing in the afternoon.High schools tend to more have after-school, extra curricular activities such as sports and clubs. I agree it's bullshit though....
Why isn't TV static colorful instead of B & W?
Television signals have a signal with color information synchronized after the beginning of each horizontal line called the "colorburst". If that signal is missing the decoder falls back to black and white decoding that only includes luminance values, in order to preserve backwards compatibility with older signals. Sta...
How do hybrid cars work?
They generally consist of an electric motor, a small efficient gas engine, and a battery. The car runs off the electric motor/battery at certain speeds. If necessary the gas engine can kick in to provide additional power or recharge the battery. There are a lot of different variants and additional components, but that'...
How can sticky notes stick to things well, but still be able to peel off easily?
The sticky note itself is very light so it doesn't exert a lot of force on the adhesive. When you pull it off, even if you just give it a light tug, you are using far more force to remove it than when the sticky note is just sitting there.
Why is there no indigenous human population in Antarctica?
It was impossible for early civilizations to survive out there. It's simply too cold and too barren. There is not enough plant life to sustain the fires they would have needed to stay warm. There is not enough animal life to feed a town. Agriculture is not possible. The only way scientists survive there today is by dep...
What does a university accreditation do?
Accreditation for a university says "this place doesn't just SAY it provides a university-level education -- it actually does so, as validated by a jury of its peers. You can trust a degree from this place to have covered the usual topics, be graded at the usual level of difficulty. This is *not* a scam or a place wher...
How does a politician get impeached?
For president and vice pres. its for treason, bribery or other high crimes and misdemeanors. Since these offices are political and need to be protected from random or arbitrary prosecution only the combined elected representatives of the people and states can do it. So the House of Representatives must vote to impeach ...
If a person is deaf, do loud noises still hurt his/her ears?
Sound is still energy that affects your body whether you can hear it or not. Certain sounds hurt our ears because our ears are very sensitive and the sound levels are high enough to be damaging. However, even if someone is totally deaf, that doesn't mean that the sound waves can't do damage. If we want to go all the wa...
Why is a phone call audio really bad but a Skype call is really clear?
Skype just uses a better codec for audio. It takes more bandwidth, but can also provide better quality. Phone calls on the other hand require very little bandwidth, that's why you can call from virtually anywhere, but it comes at the price of sound quality.
How a company like HBO can detect a torrent on my PC?
Because HBO themselves have downloaded the torrent and ran it. They're writing down IPs, filenames, and applications, which you can garner from a torrent while it's downloading or uploading from/to other users. HBO then sent a letter to the ISP saying "This, on this date, was committing piracy." HBO doesn't know it was...
Why is taking a caffeine shot not doping.
With steroids and performance enhancing drugs there are a couple of concerns. The first is the long term harm caused by these drugs. We know caffeine pretty well and aren't worried about the long term effects. The second is we don't want sports to become an event where the person who makes the best steroids win. Caffei...
Why does dandruff only appear where hair is present?
It gets trapped. Dandruff is dry skin flaking off. You lose a crapton of skin every day. Where there's little or no hair it just falls off.
When performing a financal analysis, what NPV value do I use?
WACC is how much it costs the company to get the money it needs for investments. ROR is how much minimum money the company would like to make out of its investments. Which one you would use depends on why are you doing the analysis.
Can I just make up a contract for my services for something else (but hide something immoral withing it)?
No, you can't do that. I don't know the exact legalese, but IIRC you can't put something in a contract that a reasonable person would not agree to, or that is unenforceable for whatever reason. In your example, no reasonable person would agree to pay $2 million to get their room painted, so it wouldn't hold up. It does...
Why does the melodic minor scale have a different ascending and descending order?
It's because of the leading tone. In a C major scale, the B is only a half step below the C. Because of this, people consider it to "lead to" C, so B is called the "leading tone". When a piece of music is written in C major, most instances where you have a B, C will usually follow. This tendency for B to lead to C is s...
How can I remember every single word from a song I listened to for about 10 minutes when I was 7 but can't remember anything now?
It's a lot easier to memorize things to a rhythm. In fact, a lot of knowledge throughout history was passed down via chanting because it's a form of rhythmic speaking. This is also why we learn alphabets to the tune of a song, and why "School House Rock" was so fucking awesome.
If we could know exactly how much gold was in a gold mine, would we need to mine it?
If you could certify that a specific amount was located there and everyone else agreed that whatever you're using to declare ownership had the value ascribed to them and would go along with gold ownership purely as a store of value , then yes, it could be used as an investment. You may be interested to look into [Rai s...
Why does Christians not pray for Satan as he as pure evil need it the most?
The Bible tells us that God has already condemned Satan to his situation in an everlasting way, and it tells us to shun Satan. So praying for Satan appears to be asking God to "change His mind" and go against what we have been specifically told. [Details here.] More details [here.]', "Satan is supposed to be a fallen a...
How can tall buildings support a large pool on their rooftops?
Well compared to all the steel beams, electrical cables, concrete, a pool full of water really doesn't weigh all that much. And as long as the bottom of the pool is reinforced and supported properly, it really doesn't make a huge difference.
Why do so many Americans circumcise their children?
Circumcision was introduced to the American masses in the 19th century as a way to curb STDs and masturbation. The practice caught on, and now probably the most prevalent reason that we continue circumcising our boys is societal, i.e. everyone's doing it. If you're uncircumcised and someone finds out , then you're prob...
Why is something like Snapchat worth billions because of its potential revenue, but Reddit is not?
Because Snapchat has network value that Reddit does not. That means that Snapchat knows who you're friends with, who you communicate with, and who communicates with you . This data about your social network is extremely valuable. Additionally, Snapchat benefits from a network effect, meaning the usefulness of Snapchat ...
how does a contact stay directly over your pupil?
It has a similar curvature as the cornea does, which is different from the rest of the eye and that makes it center itself to the cornea.Your eyeball isn't a sphere. It's very round with a bump where your cornea is. The contact lens is formed to sort of that shape. Some brands fit better than others due to variations i...
How do they measure how much water travels through a a waterfall every minute/second?
Geometry. The wall of water is a rough rectangle the width of the opening, and the thickness of the water depth at the edge. Drop a knotmeter in and you get the third dimension - speed of the rectangle . So, assume a waterfall 100x1 feet at the dropoff, doing 8 kts . So, 100x1x16 feet go over the falls every second, or...
What are empty Calories?
The most confusing part is the fact that a calorie isn't a real thing you eat. It is a measure of energy.. like Joules for example are in chemistry. What makes someone gain weight or become fat is much more complicated than just "oh i ate 3000 calories". You can't eat a calorie. You can just eat something that *measure...
What exactly is corrupt about the World Cup?
[This Video] explains it really well . What should be added to it however is that Brazil can't really afford to hold the word cup, and so far it has already costed them 11 billion dollars they don't have. They made that money partly by closing down schools, hospitals and by halting actually important building projects ...
If they can make a 5.5inch 1440p screen, why can't there be a 4k 24inch monitor
There are plenty of computer monitors in the 24" range with 4k resolution or more: _URL_2_ _URL_1_ _URL_0_They *do* exist. I posted a link to a few of them at newegg, but it got deleted. Just search any tech site for 4K monitors.
Why is growth considered so important to companies and economies as a whole
Because it means you're either in a market that isn't growing, or it is growing but your competitors are getting all of the new market share. And even if your market isn't growing , there are still ways to grow profits, by reducing costs.
How did police stop people for speeding before radar and laser guns existed?
by pacing them. the officer would drive at exactly the speed limit and see if they were gaining on the vehicle, or if it was getting away from them. or they would match the vehicle's speed and see just how fast they were going", 'They would also time you between two points. If you went from point A to point B in a time...
How come you can use a password, or a combination to a lock, every single day or even multiple times a day and then one day out of the blue you just forget it?
You've probably transitioned to muscle memory. You no longer consciously enter the pin or twist the combination lock to a specific number, you've just got a sense of the pattern to move your hand on the pin, or how long to turn the dial on the combination lock. Once you try to transition back to conscious memory, you r...
What is happening to our bodies when we are having a food coma (feeling really tired/sleepy after eating large amount of food)?
After eating a large amount of food, your body engorges your digestive system in blood in order to transfer the raw materials away from your digestive system and where they need to go in the body. During this process your blood sugar rises, which triggers your body to dramatically lower your blood sugar and store that ...
Why is wearing a hat disrespectful?
Removing your hat has been a gesture of respect in Western society for a while. So as a side effect of that, failing to remove your hat is disrespectfulThe explanation I recall hearing is that it goes back to medieval Knights lifting their helmet visor to show their faces. This eventually evolved into both the practice...
Aside from religious belief, how do Sunni and Shia politicians differ?
They don't, necessarily, but many parts of the Arab world still have a very tribal political mindset. People want their leaders to be from their own group, and they resent when people from other groups rule over them.
What's happening physiologically when someone hets a massage and why does it feel so orgasmic?
It is an increase of blood flow and release of chemicals in the brain that reduce pain and increase happiness. JohnH CMT
Why is the price of gasoline in the US advertised at 9/10 of a gallon and not the full amount?
It's not. The price adds another $0.009 . That's just another throwaway tax, that Americans don't even notice.
Why airplane manufacturing companies don't put some kind of a net on a jet's turbines?
Aerospace engineer here. What folks are saying about nets is true. There has also been a TON of engineering and design work put into the jet engines that prevents a bird shot from damaging the actual engine. It allows the fan blades to break, but prevents them from going deeper into the core, causing millions of dollar...
How does crying come so easily to us as kids but not as adults.
I’m not sure what you’re talking about; I still cry all the time as an adult, just about less trivial mattersAs a young child, crying is one of the only ways we know to deal with disappointment. As an adult, we know a lot more ways, and can deal with our problems in less expressive ways.
Why are most flags shaped like a rectangles?
Well, its easier to bring a rectangular shape up a flagpole and having it longer makes it more visible. So the logical reason is that they would want something visible and easy to haul up', "Flags are often something you need more than one of, and probably hundreds of thousands depending on what the flag's for. It migh...
How does the body know where to make collateral bloodflow when an artery/vein has been damaged or blocked.
It does not know anything, it simply follows the path of least resistance, if one vessel is blocked/the resistance is high the flow increases in the rest of the blood vessels. However living tissue that does not receive enough oxygen sends out signaling compounds into the surrounding connective tissue that encourages r...
If water freezes at 0˚C, why does my car warn me of ice at 4˚?
Because there still could be ice on the ground. It could be melting but not completely melted yet. They warn you early to give you advances notice of conditions that could potentially create iceThe bulk freezing temperature of water is 0°C, which means that liquid water will turn to ice rather than lower its temperatur...
What is cellphone unlocking? Why is this issue all of a sudden so pertinent?
When you buy a cheap cell phone you're only paying a fraction of the phone's cost in advance. The rest of the cost is included in your monthly payments.The carrier who sponsors your phone wants to keep you as a customer so they 'lock' the phone so it won't take a SIM card from another carrier.So when the term of your c...
Why is local produce more expensive than non-local?
It's due to economies of scale. As Wikipedia puts it, "economies of scale are the cost advantages that enterprises obtain due to size, output, or scale of operation, with cost per unit of output generally decreasing with increasing scale as fixed costs are spread out over more units of output." In other words, your sma...
How come some people drink till they collapse, without throwing up? Yet, if I reach certain point of drunkness it always ends in the toilet.
Functional alcoholic checking in - Howdy :) Back in my teens, I used to puke pretty easily when I got drunk - it was a combination of upset stomach because of the alcohol and the dizziness that being drunk brings. Now though, I 've been drinking for long enough to be used to the sensation, and my stomach no longer reac...
Why have basements come to be considered "scary" places, such as in horror movies?
Basements are underground, poorly lit , cold , damp places that you do not generally go into all the time. Each of those things adds to it being uncomfortable and disconcerting, which in turn makes it "scary".
Is me sorting my recycling from my trash making any noticeable impact?
> Are there things that are more cherished as far as recyclable materials go? Yes there are - there are things that the recycling plant will actually pay you for - mainly aluminum. You need to look into your area to see what recycling facilities are available. In many cases there are no facilities nearby and the recycl...
What is Brownian Motion and what is their correlation with droplet evaporation?
So Brownian motion, is a theory that describes the motion of molecules in a liquid or gas, where they move around and bump into each randomly, and their individual energies can take essentially any value > zero but with differing probabilities for each value, with the frequencies of these energies having Gaussian distr...
Torrents are up with real copies of something that is streaming live.
What do you mean by "live"? Live events can't be torrented until they finish broadcasting. Something like a TV show can be leaked any number of ways before its "official" air date. Many shows also air earlier in different timezones. Which is one of the reasons you'll see Canadian watermarks on a lot of torrent content....
What Do Atoms Really "Look Like"?
For something to be visible to us, light would have to bounce off it in to our eyes. Atoms are so small that that model just doesn't work. Photons of light can interact with atoms in strange ways or not at all. For example, a LASER works by bombarding atoms with light so that one of their electrons is temporarily bumpe...
Why do schools that preform better get more funding then schools that may use the money to help better educate students?
In the US, the primary source of school funding is local property tax. Which means schools in affluent areas get more funds than schools in poorer areas, which in turn create better educated students, who tend to get higher paying jobs, and live in more affluent areas sending their tax dollars back to those affluent sc...
When a fruit is bruised, why does its flavor change?
Inside of an apple is the molecule catechol. In the presence of oxygen a chemical reaction occurs at an enzyme to produce a different molecule, benzoquinone. That molecule turns the flesh of the apple brown and makes it mushy.
How do they salt the inside of the peanut?
The peanuts are put into a brine mixture and the air is vacuumed out which causes the brine mixture to be pulled into the shells. Then the peanuts are dried, which leaves the salt behind.
Why is youth unemployment in Spain so high?
Hi!Im Spanish and this is so annoying Im an engineer student, the fact is that here, we have a lot of engineers and diplomated people. The education system is bad but the youngsters are really prepaired for work. But here, in this fucking lovely country, the busineesses dont want to have any kind of "danger". They only...
Why does thinking of bugs sometimes create the illusion that bugs are crawling all over the body?
Thinking of bugs all over your body is quite stressful. Stress triggers the secretion of an hormone, cortisol, which changes your metabolism drastically . It also messes with the natural lipid barrier on your skin and decreases the amount of specialized proteins that protect it. Therefore, it can cause rashes, itchines...
Why do we call elected officials “public servants” when they are neither public nor servants.
But they are both those things, at least in theory. Their job is to serve the people by respresenting their interests and carrying out their will as part of the governmentBecause their roles serve the public interest. They usually work in a sector of government, and while they aren’t servants in the literal sense, thei...
why do some medications alter your sensitivity to light?
Some medicaitons are photoactive chemicals on their own, therefore are reactive to UV light. This can magnify your body's own response to UV light causing you to sunburn a lot sooner or to a greather extent than normal.
In carbon dating, why do we assume that the ratio of Carbon 14 and 12 in the atmosphere has always been the same? (or for the last 60,000 years)
We dont, but if you would have an item that gathered carbon out of the atmosphere for the last few thousands years you could check how the ratio was changing. We use very old trees to do that, the oldest living one is around 6000 years old and It's a bristlecone pine. Also antarctic ice could be used to further analise...
When a patient dies from injuries, what happens to the medical bills?
The payment comes from the deceased's estate. If they have no money, then there is no payment. No, it's not malpractice if the patient dies. It's only malpractice if there was some kind of grave error on the part of one of the medical professionals. That is, you can sue and claim malpractice for any reason, but the cha...
How does wave-particle duality relate to Heisenberg's uncertainty principle?
There's no medium. The waves in quantum mechanics are probability waves. One way to put it is like Feynman said it: there's only particles. But if you want to compute what the particles do, you need to work with "probability amplitudes" and it's those probability amplitudes that behave as waves. [Relevant lecture by th...
Taboo Culture of Tattoos in Japan
Yeah, the whole yakuza angle is much of it in recent times, but tattoos in Japan have throughout history been associated with criminality and the underclasses. Originally, tattoos of lines, circles, or dogs , were branded onto criminals to identify them. Even after this practice died out and tattoos garnered a more rom...
The culture of cosplay. What goes on at conventions? How do people win prizes for cosplay? How do cosplayers interact with each other?
> Basically, I'm looking for an explanation of cosplay beyond "people make really elaborate costumes and then wear them." Really, that is about it. Except there really aren't a lot of cosplay specific conventions, there are going to sci-fi/anime/comic book conventions. Mostly it is just a way to get attention, recognit...
If an aluminum can can get recycled into another aluminum can why do we use plastic bottles?
Several reasons: Recycling rates are not 100%, so some of that initially-more-expensive aluminium goes to waste instead of being recycled. And the recycling process itself is not perfect so you don't even get all of the aluminum of the cans that do get returned for recycling. You can enclose more drink with the same ma...
How NY Fashion Week "fashion" becomes what we wear.
Have you ever watched The Devil Wears Prada? it's explained pretty perfectly When Andy calls fashion "stuff" Miranda explains the fashion trickle down. "Miranda Priestly: "\'This stuff\'? Oh. Okay. I see. You think this has nothing to do with you. You go to your closet and you select I don't know that lumpy blue sweate...
What is "getting DDOSed" and how can people prevent it from happening?
Getting "DDoSed" means that someone is actively trying to block incoming traffic to a server by saturating it with requests. For instance, let's say you're a juggler who can catch one ball per second. This is the normal behavior of your server. Now, I come, and I throw simultaneously five balls at you. Not only you wil...
How are "human limits" determined in athletics and sport in general?
I ran track in highschool and followed the scene a bit. Most of seems to come from simple observation of past history. In the example you mentioned it is just that nobody has ever passed that mark. No matter how hard people train and repeat the cycle, nobody has done it. Basically they just figure that if nobody can tr...
Why, when I take a picture, does it appear further away in the image than when Im just looking through my eyes?
How far away the image will look is determined by the focal length of the lens on the camera. At 50mm the image will look the same as the human eye. Larger lenses will appear closer, more zoomed in, and smaller lenses will appear further away. If you are taking the image with a small lens that's what it's always going ...
Why do most stores in the USA have a "No shirt, no shoes, no service" and when did this start?
I do not know when it started, but, as someone who works in a store, it's probably a preventative measier to keep unattractive people coming into the store without a shirt on. And feet are widely considered unsanitary and unattractive. If I had to guess, I would say it became more widespread during the hippie movementr...
How can bitcoin be worth money?
Why is a piece of paper in your wallet worth anything? Because people will trade goods and services for it. If people will trade those same goods and services for a Bitcoin, you can determine a value of that BTC in paperBecause people want it. Some things are worthy simply because others will pay money for it , money a...
Could a sufficiently strong structure cut a tornado in half, horizontally and/or vertically?
A tornado is a mass of spiralling air moving at high speeds. If a structure is strong enough to resist the force of the air moving around , the tornado will simply move around it. Air is not a solid mass. It can move around. A good experiment is to put a bit of dry ice in a bucket, then take a knife and try to cut the ...
why does the US still not use the metric system when pretty much everyone else does?
Because we already do where it's important. Due to domestic political opposition to moving over to the metric system the country never systematically did. However, in the sciences and most industry with global exposure where there was a strong incentive to move over to metric anyway, the shift did occur. There is littl...
What changed in technology to allow for ubiquitous quadcopter drones?
There's a few things. Batteries are one of the big ones. Cell phones have really pushed the development of high capacity, long life, lightweight batteries. They've also pushed the development of low power CPUs, which are essential to keeping a drone flying. Thirdly, thanks to things like the Nintendo Wii controller, ti...
If fish are cold blooded, how do some species function at depths of over 900 meters where the temperatures are 0-3 degrees celsius?
Fish have a unique chemistry. It has been determined that often their blood is similar to antifreeze. This makes them able to function at colder temperatures than a lake trout or some similar surface water speciesIn warm-blooded animals, certain chemical reactions that are part of the metabolism can only occur in a nar...
Why does Pi show up in statistics?
Any time you have something with e^-x^2 running around, as in the normal distribution and the gamma function, you have an opportunity to get a pi showing up. It has to do with what that function looks like, geometrically. This isn't really ELI5, but it shows where this comes from: _URL_0_", 'For the normal distribution...
Why do our feet get cold easier than the rest of our bodies?
Your hands and feet tend to get cold much easier because they're furthest from the middle of our body. The capillaries and blood vessels are much smaller and thinner at our extremities and it's the last part of our body to get blood circulation from the heart. An interesting point, when we eat a large meal and then our...
In common law why do the courts/judges have the ability to create law? Doesn't this go against the doctrine of separation?
The principle separation of powers issues between the Courts and the other branches of Government in the U.S. system have to do with the nature of how they interact. Courts are limited to cases brought to them, and have neither the power to enforce their decisions nor the ability to provide their own funding. It's true...
How come sometimes my finger smoothly glides over the surface of my phone screen, but sometimes it drags and leaves a streak even if I just washed?
There are several factors that can affect how much resistance you have while moving your finger across your screen. For one, the harder you are pressing your finger down, the more friction there will be between your finger and the screen. You may do this without realizing this. Secondly, different amounts of sweat and ...
; How do successful musicians get paid?
They make money from concert tickets. Record and digital sales usually go to the record company. They might earn a few pennies from those 99 cents, maybe even a nice chunk if they own the record company. But the real cash is in the live performances.
"Special Interests" (politically speaking)
Here's an example: You make widgets at your factory. You want to make sure there are laws that make widgets safe, and you want to be able to sell your widgets in many places, and you want advantages when competing against foreign widget makers. For all of these reasons, you go to a politician and say, "My state widget ...
Why can't we drink salt water, but we can eat salt and then drink water?
Well eating straight salt then drinking water is just as bad. Salt water has A LOT more salt then you think it does> Seawater typically has a mass salinity of around 35 g/kg, _URL_0_ Since 1kg of water is 1L, this means that there are 35g of salt for every litre of water. All of this salt though is not like table salt....
Why doesn't america join the bandwagon and start using the Metric system?
We do use the metric system and it has been adopted by our government. If you are a scientist, you use it daily. That being said, if you work in construction you are using inches and feet not meters, and if I'm baking a cake the box instruction will be in cups not grams. Most Americans think in imperial units in our he...
Marxism. I'm very confused.
Marx formulated his theory in a time when the framework he set up was extremely relevant. There were those who worked and those who profit who didn't work. The idea is that, because the bourgeoisie have control of the means of production, which is necessary for productivity to be realized, that they are hoarding a reso...
Why can I hear radio transmissions through a tea kettle?
This could relate to how crystal radio receivers work. They are simple receivers that use a wire that touches a semi conductive mineral to make a rectifier. This allows the crystal radio to receive radio waves wirelessly and without any batteries . The sound from them is extremely weak, though, and people usually use s...
The pothole-problem, to someone not living in the US?
The [Michigan Department of Transportation] has an informative graphic that shows how potholes are formed. I think it is worth noting for the European commenters here that the temperature changes we deal with in North America are pretty large. In eastern Canada, an average winter's day is -10˚C, and it is very common d...
Smog in China. What is it, how long has it been around, why is it worse now, what is/can be done about it?
Here's a good link that explains the extent of the smog in Beijing. _URL_0_ The industrial manufacturing industry in China is massive, and without equal, and it would appear the environment around them is collapsing under the industry's weight. Over here we have emission credits for factories and whatnot, which aim at ...
Why is the history channel just a bunch of reality shows now instead of...history
TV networks make money off selling advertising time on their channel. The advertising times cost so much per second, and that is determined by how many people watch a particular show at a particular time. These reality shows get more people to watch the channel, therefore the network will put the shows on that get the ...
How do Open Source projects begin, and later are financed?
they can begin by someone having an idea and going ahead and creating the project as open source. it's as simple as that. if i had idea right now to make a new project and make a new type of reddit bot, i would just create the project and publish it for others to review. others could contribute to the project as they w...
Why is there a correlation between having astma and having AD(H)D?
[Behavioral and emotional problems — such as attention deficit disorder, hyperactivity, and depression — are somewhat more common in children with asthma, but the link is not entirely clear. Doctors don't know whether there is a biological reason that they occur together, or whether the social pressures caused by havin...
How do certain words become "swear" words?
Most of the 4-letter taboo words in English come from Germanic languages and were considered crude to the Romance language used by the aristocracy, as the last poster explained. In some languages the harshest swears are phrases that invoke religious figures like Jesus and Mary. Nearly every society has words that are c...
What happens to all of the (literal) crap after water treatment plants process our sewage?
It is filtered out and dried, and then turned into little fertilizer pellets used in the agricultural industry. The water is cleaned and returned to circulation. So yeah, eventually, we eat and drink itMany years ago the stuff from NYC used to end up being flung over Texas. The locals were not happy, well except the fa...
Why have I never seen the tabs on takeaway ('takeout') packaging actually used by staff?
Not sure but I've seen them pressed more often when I order for multiple people. I think it's just a shorthand so the customer knows which drink is which and which box has which burger. So when my mom orders for me and my sister and herself she can easily give my me coke, my sister her root beer, etc..Because the minim...
Why we can't have surgery when the blood pressure is high? And also isn't it possible to decrease the pressure by draining some blood?
Having high blood pressure increases the risk of a cardiovascular event happening during surgery. The anaesthetist will judge how comfortable she is with managing that risk, if the risk is judged too high then surgery will be postponed. As to lowering blood pressure through bleeding, the cardiovascular system is set up...
Over the years, why have certain jobs started requiring college degrees, whereas in the past most jobs could be filled by high school graduates?
Largely because they can. Enough people needed jobs during the recession that they were able to put excessive requirements on job listings and still fill positions. In addition with the lack of jobs for unskilled labor more and more people are going to college so you're not limiting your potential candidate pool quite ...
Why do automatic transmission cars get lower mileage per gallon compared to manual transmission?
though modern automatics are actually as close, if not better than manual transmission cars .traditionally in the past, the main reason has come from: 1) weight, an automatic transmission weighs more than a manual, meaning more energy is wasted getting the car moving. 2) Torque converter, in order for an autoamtic car ...
Why do I run slow in my dreams?
the reason you move slow in your dreams has something to do with how your body basically paralyzes you when you are sleeping. In your dreaming mind your sending the same commands to your limbs to move as you would if you were awake. But those commands are dulled by whatever chemical your brain paralyzes you with. iirc ...
Why is LaserJet ink magenta and cyan instead of blue and red.
When you combine red, blue and yellow light, you get white light because those are primary colors that are considered "additive" colors. This means when you combine the colors you go from black to white. This process is adding colors to colors. When you are dealing with printing on what is almost always white paper, yo...
Why is Mexico so underdeveloped compared to the US and Canada?
Yo ho ho! Yer not alone in askin', and kind strangers have explained: 1. [ELI5:why is mexico a third world country while the U.S and Canada are first world ]1. [ELI5: Why is Mexico so poor compared to the US and Canada? ]1. [ELI5: Why is Mexico so underdeveloped in comparison to the US and Canada? ]1. [ELI5: Why is Mex...
What is the IMF and the World bank?
The IMF, which stands for International Monetary Fund, is a collection of, currently 188, countries which is designed to help foster growth of a country's own economy. It's done by each country contributing a small portion to provide for both the service of financial guidance and a modest amount of emergency funding an...
EnChroma "anti-colorblindness" glasses, how do they work?
They block the frequencies of light where red and green cones both sense light, but is wider with color deficient people which isolates red and green from each other making them easier to differentiate.
How are big but not transatlantic planes brought to Europe (and other places) from America after being made?
They fly them there. The ferry range range of a 737 is plenty long enough to fly transatlantic from Canada to the UK. Shorter legged aircraft can go US - > CAN - > Greenland - > Iceland - > UK> Such as the Boeing 737 The Boeing 737 can fly across the Atlantic. Aircraft that cannot make the journey themselves would need...
Why are trams so much better at climbing steep gradients than (most) trains
Trains have wheels on the engine that have to move the whole train. Even though engines are very heavy, that's the traction limiting factor. Sure, you can leak sand onto the rail, but that increases wear. A tram, on the other hand, isn't a long string of vehicles with only one set of drive wheels. Many of them are 2-4 ...
what are the benefits of practicing yoga everyday?
An Indian here.. I used to practice yoga daily early morning when i was 13 year old till 15 as it was compulsory in my school. After I completed my high school, I kind of completely left practicing yoga.The main difference i observe is the strange feeling of activeness i used to have the entire day when i used to do yo...
How close are we to WWIII right now? What single thing has to happen?
World War 3 isn't even on the horizon at the moment. In fact, it's going to be totally impossible until we can develop a way to neutralize the danger posed by nuclear weapons. The Cold War might be over, but MAD is still in place; none of the major players on the world scale can fight it out without killing themselves....