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How is a single-machine software license recognized when it's being used on that machine? Is it registry-tied or IP-address-tied?
It depends. You can do it to Windows key or a GUID which is a bit more complex. You can tie it to an IP address, but that's generally not a good idea because IP addresses are not necessarily fixed. Its better to tie it to physical attributes. This is called hardware binding. For example, your MAC address can't be changed. But what if you had to swap out your network card. So use HDD serial # or CPU serial #. Modern hardware binding uses a combination of several physical components of your PC so long as only a few of them change during an upgrade it won't invalidate your license. Or there could be a physical crypto device like a USB key that is attached. Or there could be a crypto file somewhere hidden on your PC. Lots of ways to do it.
If someone was brought up without being told about sex, would they still know what to do?
Everyone else failed to consider that all the teenagers getting pregnant today are also exposed to huge amounts of sex in the media and their daily lives. If a straight male and female were completely isolated from any mention of sex, then they were introduced to to each other after puberty, it would take some trial and error, and it might take a long time, but they could eventually end up with a kid. The guy would quickly discover that his penis gave him pleasure when he messed around with it. The girl, through cleaning or scratching, would figure out that her vagina gave her pleasure. If they spent enough time together, they could feasibly begin to share these experiences beginning with a form of mutual masturbation. As they fumbled around with each other's parts, and became more familiar with what made each of them aroused, then pregnancy is a possibility even without penetration. It would only take a small epiphany to move to direct penetration. There is a movie called the [Blue Lagoon] that covers something like this, though it doesn't go too into detail about the steps that the couple crossed to discover penetrative sex.Yes indeed .humans, and all other mammals, have a sex drive hard wired into our brains. No instructions necessaryAbsolutely. Although they would probably also put their penis in many other places as well. It's all good. The only reason we need "sex education" is to reduce the associated risks and hurt feelz.
Why do windshield wipers push the water to the drivers side?
The wiper is vertical when it reaches the driver's side, getting more water off than the passenger side.
Why can't we provide internet by using the same technology that broadcasts television shows?
The TV setup has two BIG perks the internet doesn't. * It's a one-way connection.* The messages are being broadcast to no one in particular with little concern about privacy. Your internet is bi-directional AND intended to be a connection that's potentially private for just you. This results in a **TON** of extra overhead in routing data, encrypting it on a per-user basis, etc. For wireless TV broadcasts, the antenna at the TV station has no ability to listen *at all*, and there's no system in place to distinguish unique users .
How does molecular mechanics work?
Molecular mechanics uses the fundamental forces of physics to describe physical properties of molecules and biological systems. This field is usually used in conjection with computational chemistry techniques since the mathematical construct is complicated and tedious. In my use of molecular mechanics I used guassview Chem draw and other software to predict spectroscopy analysis. In an ELI5 way this could be used to predict what color you would get off you mixed blue and red paint before you actually mixed the paint. If the software says purple and i observe purple I can say with confidence that my software predicted my mixture. Now if i mixed 2 chemicals together to make a product that I assume will be created using chemistry intuition and obtained the Mass Spectrometry, Infared spectroscopy data and noticed that my software had the same results i could say that my product is what I think it is. This is just one elementary use of molecular mechanics.
how the reddit frontpage is determined
Here's an attempt at a LI5 answer which says more than "most upvotes in littlest time." Imagine a racetrack for horses that goes on forever in one direction. The start of the track is labeled "Jan 1, 1970 12:00am" and there are equally spaced notches labeled "Jan 1, 1970 12:01am
Explain how full immersion while living in another country is the fastest way to learn another language?
That's how you learned English and you were fluent in a few years.You pick it up as you go. You have to. I went to a Spanish immersion school K-2nd and by the end of second grade I was fluent in Spanish. The teachers would talk to you in Spanish and expect you to understand. It seems daunting at first but I was able to get the hang of it much quicker than learning it out of a textbook.
How do fossils of an action or event get made?
It's fossilized sap. It's basically tree blood, and it flows pretty quickly, and in some cases is almost like water. The insects drown in the stuff while fighting, and the sap hardens over the years. This might be morbid for a 5 year old, but it would be like having a bunch of concrete dumped on you. The concrete would preserve exactly how you were as it all fell on you, and you would die trapped in the concrete. Same thing happened here.That's not a "stone" type of [fossil] but insects trapped in amber which is a [fossil resin ]. The insects got trapped in the [resin] from a tree and that kept them intact over the ages when it turned into amber. [_URL_4_ article on the find].
Why is Russia's cyberattack against the White House not a bigger story?
The scope of the breach was very limited. To our knowledge, it was limited to essentially the President's schedule and agenda. There was no classified information and the breach did not extend to more secured parts of the system.
How are some physical traits able to skip through a generation?
You have two copies of each gene, one set from your father, one from your mother. Each copy is called an _allele_. Alleles can be recessive or dominant. If you have one dominant allele from one parent and one recessive from the other, the dominant allele will be expressed. Only if you have two recessive alleles will that version of the gene be expressed. So, it's easy for some traits to skip a generation if they're recessive, since there are more ways for a dominant allele to take effect. Let's say you have the a recessive big nose gene. The dominant allele is N and the recessive one is n. Mother - N, father - N = NN, a small nose Mother - N, father - N = Nn, a small nose Mother - n, father - N = nN, a small nose Mother - n, father - n = nn, big nose
Why the LAPD cooperated so much with OJ during his chase?
In a fantasy world, we'd imagine that LAPD would call the local military base, and have a fighter plane or attack helicopter fly out and disable the bronco with a missile, bomb or some gun. Maybe have a sniper ahead on the road, shoot the driver or engine block with a large bullet. Maybe have an officer in an armored car drive into the bronco, somehow disable it and a bunch of officers swarm it in some kind of shoot out. Problem is, OJ was armed, in a car with someone, and the streets and overpasses were filled with lots of bystanders and gawkers. He was being followed in the air by multiple news helicopters, police helicopters, a convoy of police cars, etc. He can't escape, just let the situation calm down, he has to stop eventually. There is no immediate threat, let it go play itself out. Much like the stand off in Oregon, they just let it peacefully fizzle out, and arrested everyone, with only 1 person dead. Compare that to the mess that occurred in Waco, TX with the branch davidians, or the Weavers.
Why does it cost money to get a domain? And why does the price change for every company and domain ending I use?
The registry fee the ISPs pay is small yet many are greedy and figure most people are stupid or desperate to get the name they want so charge lots more for it.
Why do big computers have fans but little ones don't?
A fan in phone would make it too fat. So it uses a heat sink instead. When it reaches maximum temp it then bottlenecks itself til working temps ate resumed..It's not only a matter of passive or active cooling. It is also a matter of architecture. The ARM arch, like phones or small computer is designed to have low power consumption and so they did not heat up.Of course they are less powefull compared on AMD64 architecture. [Here] there's a major explanation
Why do military and police forces often side with the corrupt governments when the people rise up against oppression?
Here's the thing: The government pays their bills. It provides a certain quality of life that is, more or less, guaranteed. Everything is set in place, there are people to handle the ins-and-outs of governing, etc. Post-rebellion, *none of those things exist right away*. It takes time for everything to stabilize, and if it happens to stabilize in the 'wrong way,' you end up worse then where you started . The Military/Police know this. They know that there is no guarantee that what the revolutionaries would bring would be better than what exists now. 'Make things better' sounds easy on paper. In practice its a convoluted and painful process that involves lots of people going from a semi-organized revolutionary force into what needs to be an extremely organized government. Once again, look at Egypt - nothing happened quite to plan, and its only recently stabilized - it remains to be seen if the government executes in a way that actually ends up bringing long-term stability.
Why do foods that are bad for you taste better than things that are healthy?
We've evolved to feel rewarded for certain chemicals and compounds because they are vital for our survival. However, in modern society, we can get them in abundance. Our bodies haven't evolved a way to say 'hey wait, that's way too much of a good thing.' So we over-consume and the excess has deleterious effects on our health.
what is the alternative to a two-party system?
A multi-party system. For an example, look at Canada. We have several parties, in fact as long as you are willing to pay for it, you can start your own party based on any political belief. We have the Conservatice party, the Liberal Party, the Blocques de Quebecquois, New Democratic Party , Green Party, etc. We even have things such as the Marxist-Leninist Party. Currently we have 5 parties sharing the House of Commons . In the lead with a majority government is the Conservative Party, followed by the NDP, followed by Liberals, then the Blocques, and finally with a single seat is the Green Party. It may seem weird, but essentially it works like this, for an area, my personal area is Cambridge, it's in Ontario, there are Members of Parliament , and you vote them in, instead of voting for the President/Prime Minister you vote for who you want to be the MP for your region. Ours is Gary Goodyear . And what happens is the head of the party whose party has the most seats in the HoC, becomes the Prime Minister and is more or less the director of the HoC. As to how things get passed, the Prime Minister will bring up a bill/law/whatever that is proposed, the leader of the party with the second most seats is the official opposition, and it acts like a debate until they agree, or until one side wins in a vote by convincing the other members to support them. This would be the most easily accepted alternative, because it doesn't change that much from the USA's current system, it just allows greater differentiation.A three-party system? Four? Five? Or a dictatorship? A rebel coup? Non-heirarchical democracy? There's not just one alternative. There can be as many as you think of. It just so happens that voting systems based on "majorities" tend to funnel people into 2 main sides.
Why do I (and others) talk to themselves?
Conversing with one's self has long been a common practice amongst humans. It puts our minds at ease when things like taxes, bills, work and life's other discrepancies get us down. Often times, we like to converse with ourselves in order to play out a scenario in our head before an event whether it be huge or insignificant . Consequentially, talking to ourselves becomes almost a necessity as a fail safe. If we didn't talk to ourselves in order to play out an event in our heads we would not articulate nearly as well as we do. As for the stress factor, we become our own catalyst and buffer for events in our lives. It allows us to give reassurance to ourselves when others aren't there to talk to our comfort us. It is a natural human action, yet we view it sometimes as crazy because of a common stereotype of the homeless man at the bus stop. We laugh when we see someone talking to themselves because it is in fact a comical sight. However, we all do it…hopefully while no one is looking though.
Why is it after all my ex has put me through, one conversation can undo a ton of work I've made in getting over them?
I cannot emphasize this enough: The human brain is basically six pounds of fatty Jello. The fact that it is sometimes capable of mathematics and rhetoric does not make it rationally designed; natural selection favors survival and reproduction over logic and happiness. Bio: Strong pair bonding makes sense for animals like humans, which reach maturity slowly and need lots of care when young. Strong interpersonal emotions would tend to favor long-term relationships, increasing the odds that an infant will survive to adulthood and reproduce. Psych/neuro: Neurons that fire together wire together, and don't break up easily. A serious relationship creates emotionally powerful associations and circuits in the brain. The decision to end a relationship doesn't get rid of them on its own. Sometimes they fade over time, but sometimes they only seem to get worse. The good news is that the talking cure works. When thoughts don't go away on their own, talking them over with trusted friends and/or professionals can at least help get them out of the obsessive loop and into the real world.Most animals seek out the best possible mate. Unfortunately, lots of people think that if somebody treats them like shit, it means that person must be highly desirable. They can afford to treat the "little people" like shit, because they are getting chased by tons of people like you. And it can be almost addicting when that person gives you even the slightest bit of attention like if George Clooney talked to me, like it or not, I 'd probably turn to mush. Honestly, with age it should get better. You stop caring so much about "the chase" and start looking more deeply at the people around you.
Why does my stereo measure volume starting in the negative decibels?
"Decibel" or dB isn't a unit of _URL_0_'s a way of measuring things with large ranges relative to some arbitrary value. dBFS is the measurement for digital signals, and 0dB is the maximum. dB V is the measurement for analog voltages, dB SPL is the measurement for sound pressure level in air. All are different and mean different things. And you have to consider what it's measuring. Is that the amp gain? The signal going through it? It's all relative. 0dB *SPL* is the threshold for human hearing. 0dB V is moderately low signal. 0dB FS is the highest possible digital signal without distortion0 is full signal. So you are -40dB below max.
How does Apple know whether or not a charging cable is "certified"?
There s a chip inside the lightning cable that tells the phone that its a legitimate chip approved by apple, if the phone doesn't see this, then its not legit. Yes it can be hacked, thats how some knockoff cables from China were introduced.
How come it's harder for countries in South America and Africa to modernize as compared North American, European, and Asian countries?
South America wasn't founded on wanting freedom, it was colonized to extract resources and enrich its colonizers. Then there's foreign interventions in South America. Here's a [map] of US interventions. Then there's home-grown problems like class divisions.
Why are most popular websites created by Americans?
English, plus the largest portion of internet traffic is American, so anyone who can appeal to the American market will find it easier to make a popular website.In Asia, most countries have either limitations on internet usage/content, or the internet is not widely used enough to encourage website creation. There are many many websites that are popular in Asia, but us English speakers aren't aware of them due to linguistic differences. English has the second most speakers in the world, coupled with the technological assets of the US/UK/Canada, meaning that English websites are more commonly percieved than other websites in different languages TL; DR there are many popular websites around the world, we never hear of them because English
Is there a reason why my leg bounces all the time when I'm sitting down, and I hardly ever notice?
Its a way your body copes with blood pooling in your lower extremities owing to gravity. As you are involuntarily shaking your leg, the major veins that are embedded in your leg are being squeezed by the surrounding musculature and this facilitates blood to flow upwards.The ball on the bottom of your foot in the middle just before toes starts is what activates the leg jittering. It's kinda like being tickled subliminally. Or stop smoking crack. :D
How does outside/fast lane of a motorway get congested to the point traffic is at a standstill?
The scene. Nobody wants to drive in the slow lanes because they're full of lorries so they're traveling at 60. So the next lane in gets full of cars doing just a bit more than the lorries maybe 65 to 70. So you've only got the fast lane to overtake in. Car doing 70 overtakes long line of cars in the middle doing 65 and every body sticking to the fast lane at 75+ back up behind them. Even worse when you get a lorrie doing 60 overtaking one doing 58, takes forever for them to get past and all the cars doing 65 are now in the fast lane.If people merge into the outside lane but go slower than traffic is generally flowing in that lane the person behind them has to brake, then the person behind them has to brake, and so on until you go far enough back in the line where cars have to come to a stop. Traffic moves in waves generally.
When people drink alcohol, cravings for and use of cigarettes is increased greatly. Is there a scientific basis for this, or is it purely habitual?
Alcohol is a depressent, nicotine is a stimulant, the two go very well together. Alcohol also lowers inhibition and impairs judgement, meaning you are more likely to give into a craving, and less likely to care about the implications of doing so . Mixing things that slow you down, with things that speed you up, is seen in a lot of situations. At a certain level, smoking while drinking is a very light version of speedballing heroin with cocaine.I attribute my sobriety 100% to quitting smoking. Before smoking was banned at bars I would easily smoke a pack of cigarettes in a single night out with friends. When I quit smoking I was terrified to take a drink for fear that I would start smoking again. I couldn't have one without the other. I quit 15 years ago and am still sober, and still smoke free.
Why is Disney allowed to purchase Fox Entertainment?
It has not been approved yet. It was just announced today. You can always announce it, it does not mean it will get approved. Actual approval likely wont be settled for 1-2 years from now AT & T-Time Warner is currently not approved either, and may not be resolved until March - July depending on specifics.
[America] Why Do Medical Fundraisers Still Ask For Full Cost Of Treatment Instead Of Insurance Premiums?
I 've not seen these things you are talking about, but anyway Buying insurance does not pay for the costs of treatment already incurred. If you get hit by a bus, it unlikely the Elks Lodge is going to buy you insurance during the ambulance ride. And buying insurance is generally restricted to "open enrollment periods" that happen once a year, and don't become effective for a month or two after that.
Why do puppies smell funny?
Dogs produce an oil naturally that has a slightly yeasty smell, . This oil is produced to protect the dog's skin and hair. Most often, dogs end up picking up bacteria on their skin when they are outdoors. The combination of the oil and bacteria produce what many call the "wet dog smell". Dogs don't sweat over much of their bodies, however they do sweat on their nose and paws. That, combined with any bacteria they run in to, most likely explains the smell. Source: My girlfriend's mother, a vet tech for 15 years.Do you mean puppy breath? It's from the mums milk, it goes away after a while of not drinking it anymore.
Landing on Jupiter? Possible?
There is no conclusive evidence about Jupiter having or not having a solid core. The scientific consensus is that it PROBABLY does a solid core, surrounded a liquid metal layer and then finally a gas layer. Your spacecraft would probably be crushed fairly early on, or attacked by the nasty gaseous atmosphere, or be destroyed by the magnetic field, etc etc. Failing all that, you'd hit the liquid metal layer and you'd be getting to the point that it is too dense to go any further.
How is the Michelson-Morley experiment evidence for the constancy of the speed of light?
First you need to know about what was called aether. In the past, people thought light were waves through something called aether, that sourrounds us all similar to air, but only that it exists everywhere. Now since the Earth is rotating around the sun, we must be moving through the aether somehow. That means that, when we send out light waves in the right direction, the light waves would be stretched or compressed. The Michelson-Morley experiment measured it, by having two light beams from the same source travel in a 90° shifted path, then go back and merge again. Then the merged beam was checked for it's interference pattern, which is based on how long the two beams traveled independently. That whole experiment was made on a rotating table, so the "direction" of the beams could be changed. The core message is, if there would be an aether that the light traveled through, rotating the table would result in the interference changing, since we change the way the light beams travel relative to the aether. But it didn't, which means there can't be aether. That means that lightspeed is not spreading in a medium, but is spreading through empty space itself, always with constant light speed to whoever is measuring it. What is curious about this is, that if you travel with say 0.5 times lightspeed, and turn on the headlight, you would guess that your headlight's lightbeam would travel with 0.5c away from you, but in truth it would do so with lightspeed . Edit: Typos
How could I successfully argue with co workers when they observe near record low temperatures and declare, "global warming doesn't exist."
The correct term is climate change- it is not about just warming but a shift toward more extreme weather patternsAsk them what "global" means. It's been pretty damn hot in Australia this week.Because the record lows aren't as low as the record highs are high.
Why is the synaptic vesicle not connected to one another?
> Would it make any difference if they were connected to each other? It is useful for a nerve signal to sometimes be triggered and sometimes not. If they were directly connected then you wouldn't really have an action potential to build up and "jump the gap", it would just be always on which sort of defeats the purposeVesicles are the vessels that hold the NTs and delivers them across the synapse. Are you trying to ask why there is a gap between the dendrites and the axon terminals? This gap is the synapse.
How are few companies able to own majority of the brands I use?
this is end game capitalism. lets say you have 100 companies all in one area. some do well, some don't. the ones that do well might buy out the smaller ones or the smaller ones go out of business. eventually once they become big enough, they start buying other smaller companies that retain their brand, since customers have brand loyalty. eventually after a while, you'll get what you described.
Why do large companies sign a 10-20 year building lease when that comes close or exceeds the building value?
Often it's a cash-flow decision. Purchasing the building outright costs a lot of upfront money and adds uncertainty to the end of the 10-20 year time frame if the company wants to move somewhere else. They would either be stuck with a building they didn't want, or have to sell at a price they can't predict. Signing a lease for the building locks in a yearly rate for their office space that they can count on and plan their long-term books around without worrying about risks associated with the property.
What exactly do courtroom artists do, and why are they a part of some trials?
Especially in high profile cases people want to know what's going on. Nowadays if become more common to televise events. But before this was the case Judges often banned media like pictures and video in thier courts. So courtroom artists would sketch parts of the precedings for newspapers to use.
Why Aren't Third Party Candidates Allowed to Debate?
Right now, the debates are only for candidates of a certain party. When the parties have nominated their candidates, third party candidates would be able to debate if they polled high enough.What do you mean by that? The debates that are currently going on are for the 2 main US parties to decide who their candidate will be in the general election. There are party only things so for example Trump isn't ever on stage with Clinton etc at this point. Only after the general election is in full swing will presidential debates start but normally 3rd parties don't have enough representation to be considered worth the effort to devote air time to.
How do floors get mopped, garbage cans get emptied, plumbing get repaired etc. in top secret areas? Are there janitors with high level security clearance?
Areas like that have "clean desk" policies where everything has to be secured in locked drawers when you are not at your desk. If it is somewhere with constant activities then the people there take their trash to somewhere outside the room where it gets collectedThe area is first cleared of all classified material. Documents are placed in safes with electronic locks. Equipment is moved to other classified areas. All workers are notified ahead of time that the area is under maintenance and not to discuss nor work on anything classified in the area during that time. A guard is placed to watch the open doors to ensure the only people going in and out are the intended service people. Once the job is done, the area can be secured again to resume classified work. As for garbage cans, workers just leave them outside the areaLike at military facilities? Such maintenance would be carried out by low-ranking service members. In cases where equipment goes bad and you need a specialist , usually they hire prior service-members who have gone into a relevant field and have secret or top secret clearances, and then those contractors are only allowed to go where their work requires them to be. Depending on the facility/base/wherever, they may be escorted some or all of the time* yes, often they do have high clearance* when you are away from your desk, and classified material much be secured, so there is really nothing to see* workers are notified when a uncleared personnel enter the area, and are required to secure documents immediate
Why do objects at a distance look so much further away in photos?
You used a relative wide angle lens. It has a wider field of view than your eyes so things appear farther away. You could use a more "normal" focal length to make things appear as you see them, or a longer lens to make things appear closer.Isn't there a psychological aspect too? Our brain knows we are focusing on the skyline and thus it appears bigger? Or am making things up here?
what does it mean to label China as a "currency manipulator"?
There currency exchange rate is set by the government. They set it so you can buy a lot of yuan for your dollar. This makes their exports cheap since when you buy their exports you pay in yuan and if you have dollars you have to exchange dollars for yuan and you'll get a lot of yuan for the exchange and so you can buy a lot of chinese crap that will end up in alandfill.The exchange value of currency is set through supply and demand. China allows their currency, RMB, to float, but they "correct" the value by having the government buy up US dollars using RMB. When you use RMB to buy dollars, you are increasing the supply of RMB , which makes RMB cheaper to buy with USD. Thus, the value of RMB drops. As a result, if you have USD, and you want to buy a trinket from China, said trinket becomes cheaper. You take your USD, exchange it for RMB, and then buy the trinket, so if RMB gets cheaper, the trinket becomes cheaper too. On a side note, this is why China holds so much US debt. China buys USD, and then has nothing to do with it. If they exchange it for any other currency, USD loses value, and thus it works against their goal. So, instead, they buy treasury bonds so they'll at least earn interest on their money.
Separate Facebook Message App - Why the mandatory breakout separation?
It solves the problem of having to deal with a large amount of code. Something the size of the Facebook app requires a large number of programmers to maintain, and programming gets harder the more people you have to add to a project . Having multiple smaller projects allows them to improve both products faster.Couple of reasons. First is maintainability. It is easier to build and update the smaller apps rather than trying to track the new feature requests and incorporate them in complete app. Second is importance of messaging. Facebook has realised that messaging in itself is an extremely popular section of apps, especially with its recent buyout of Whatsapp. I feel there would a future integration of features with Whatsapp user and code base. Having a separate app will simplify that processTo be fair, the apps run really smoothly together. Click on a message in Facebook at it automatically pops up in Messenger. Plus, chat heads is awesome. I 've been using the app since they introduced it, and it's definitely an improvement. It's not like you have to go "Well I want to message someone. Let me close Facebook, navigate my apps, find Messenger, open that, compose a message."
What is a Fibonacci Sequence?
A sequence of numbers, starting with 0, 1 where every subsequent number is the sum of the two previous numbers. 0 1 0+1=1 1+1=2 2+1=3 3+2=5 5+3=8 8+5=13 and so on. Hence, the Fibonacci sequence starts 1,1,2,3,5,8,13 Edit: realised 5+8 != 11. I'm an idiot.
How do investors pick franchises and are they preferable to starting a business on your own?
Investors pick franchises based on what they think will be the best fit for where they want to operate their business. Several things come into play, such as the cost of the franchise, the amount of support they get for that money, the appeal of the product in that market, and how much competition there is for that product in that market. And buying a franchise *is* starting your own business. But the difference is that you get a brand name that's established, a product line, training and other manuals, and often regional and national advertising.
Why is it that some people can learn equations and concepts when examples are involved ie: physics/chemistry but struggle with similar ideas when examples aren't involved ie: trig/calc/algebra?
There have been many theories of learning which categorise people into different groups depending how they learn. Pretty much all of these theories have been disproven. However, one thing that *is* known is that, however hard it is to categorise people, we *do* all learn differently! Some people like to see things written down, others like pictures or prefer to listen to the material they're supposed to learn. Some people can learn abstract things more easily, others can learn better by seeing and understanding examples. **BUT** - a good teacher knows this, and uses a variety of different techniques during a lesson, to ensure that learners of all types are able to learn the material. Trigonometry, calculus and algebra are all subjects that can, and should, be taught using examples . If you've been taught these subjects without seeing a single example of a real-life problem where they would be used then unfortunately you have probably suffered from less-than-perfect teaching.
why do I feel sick when I read in a car?
In order for a person to estimate his location, the brain combines information from a variety of sources, including sight, touch, joint position, the inner ear and its own expectations. The inner ear is particularly important because it contains sensors for both angular motion and linear motion . These sensors are called the vestibular system. Under most circumstances, the senses and expectations all agree. When they disagree, however, conflict arises and motion sickness can occur. Consider the situation when one is reading in the back seat of a car. Your eyes, fixed on the book with the peripheral vision seeing the interior of the car, say that you are still. But as the car goes over bumps, turns, or changes its velocity, your ears disagree. This is why motion sickness is common in this situation. TL;DR : The reason you get carsick is because your brain is confused. You don't feel like you're moving, and yet all your senses are telling you that you are. In response, you feel disoriented and sick.
When in flight why does the propeller of an airplane look like its moving really slowly?
This is called aliasing. Basically your eye cannot sample light fast enough to follow the actual speed of the propeller. Instead it samples at a rate, then pieces together the images to produce movement. If the properller spins 1.1 times between images, your brain makes the assumption the propeller moved 0.1 revolutions, and thus sees the propeller moving at 1/11th it's actual speed. If the propeller moves 0.99 revolutions in the sample time, your brain will assume it is spinning backwards at 1/99th the actual speed.
Why does vegetable oil work as a substitute for traditional fuel in a diesel engine?
Diesel engines work by compression ignition; you add a small amount of hydrocarbon fuel during compression, it eventually combusts and the energy of combustion raises the pressure and drives the piston downwards, producing power. However, this autoignition isn't a magical property unique to diesel fuel; **every** hydrocarbon will autoignite at some temperature, and it just so happens that vegetable oils have similar energy contents, viscosities, and autoignition temperatures to standard ultra-low sulfur diesel. That being said, you typically want to run the vegetable oil through what's known as a transesterification process to lower the viscosity and make the fuel a little more stable, and help with cold-starting the engine. You add either ethanol or methanol to the oil, along with bases like soda ash or lye to keep the acidity down, and then mix it to produce fatty-acid ethyl/methyl esters , along with glycerol that must be removed during processing. The FAEE and FAME products are known more popularly as biodiesel.
Is there any merit to the idea that exposing yourself to germs strengthens your immune system?
Your immune system, every time it beats off an infection, stores information about that infection in it's "memory B-cells." That way, if you get reinfected, your immune system can say "aha it's you again! I remember your secret weakness from last time!" instead of having to figure it out all over again. It doesn't have to be a big infection for it to work; even a small infection will trigger and immune response. So yes, the more germs you are exposed to, the bigger your memory banks will be, and the less likely you are to get a serious infection from any of those germs. Edit: yes, I did say "beats off"', "There is evidence ) that being too clean gives your immune system too little to do, and can lead not necessarily to a weak system but a system focused on the wrong things .
Why does my skin itch when i've been sweating and touch grass?
Grass makes very small cuts on the skin, and when those cuts are contacted with liquid it itches. It's like salt in a wound, but much smaller.
How does my fingerprint scanner on my iPhone work through a plastic bag?
Because it's not a fingerprint scanner, it's just a camera. Advanced fingerprint scanners use high resolution CMOS sensors, pressure and temperature sensors, and a myriad of other tricks to detect an actual finger against a simple printout of your print. The scanner on phones and laptops, and other cheap consumer scanners are barely more than a cheap CMOS and a cheap lenses, with some software to do the processing. If the plastic bag is clear, it should work as well. A printout of your fingerprint will most likely work as well.
The reason why NSAIDS are ineffective at reducing symptoms of diseases like Psoriasis?
Not 100% sure, but I would say that's because Psoriasis is caused when your immune system ins't working properly and the chemicals involved in psoriasis are not affected by NSAIDS
why it always seems like people wake up before the best part or climax of their dreams.
Until a better answer shows up, I believe I 've read on this very forum, that it has to do with the fact that the "best part" just so happens to excite you so much, that your brain activity increases and you therefore begin to awaken. Another aspect may be that you don't remember dreams in which you didn't wake up during the middle of them. However when you do wake up during a dream you are more likely to remember it. So you don't always wake up before the best part, you just don't remember the dream at all.
How does bracing reduce the impact during a crash?
It doesn't reduce the impact, but it gives you some warning that an impact is coming and allows you to protect your vital parts . While there have been cases where asleep/unconscious people have survived impacts that have killed others, there is often more to those stories than initially presented. Case in point: old coworker of mine had a daughter that was curled up in the passenger seat. The boyfriend fell asleep at the wheel and survived the crash while the girlfriend/daughter was killed. What gives? Well, the driver was still wearing his seat belt and the girl wasn't. He was protected by the airbag and other safety features, and she was ejected into a rock face. Additionally, we often see stories where drunk drivers survive horrific crashes that kill families, but if you read into the cases you discover that perhaps the drunk driver t-boned the victims, which would maximize his protection , and minimize their protection (no side airbags, seat belts are mostly designed for front/back collisions, so side-on collisions can cause more next damage, etc.
How can someone be immune to the laws of a country simply because they have diplomatic immunity?
Because the country that they represent have been extended that courtesy for their diplomats by the host country. It's a common arrangement so that diplomats don't get blackmailed by local police or politicians. The host country can always expel a diplomat if they don't want them there. And the diplomats country can waive immunity if they think the diplomat should be tried for a crime. But it really doesn't cause many problems. It's a popular movie trope, but in the real world it's mostly used to get out of parking tickets.They are not really immune to the laws like you would imagine. They are typically immune to minor crimes and violations. For example it is a crime in Singapore to spit on the street. A visiting dignitary cannot be held accountable to all the weird specific laws of all the countries they visit. Thus they have immunity to those kinds of violations. Things like murder, rape, fraud, or other serious crimes are not protected.Diplomatic immunity gives someone protection from the laws of whichever country they're in. If Mr. X visits America and is granted diplomatic immunity, then Mr. X is immune the laws of America during his stay. That's simply what diplomatic immunity means and does. Is this what you're asking? I'm a bit confused.
Why do the creatures at the deepest parts of the ocean look so different from that species we normally see?
A huge pressure. For anything to be able to withstand it you need either incredible skeletal structure, or massive skin and muscle mass. The former is almost non-existent, if it exist it's mostly in small organisms such as crabs, etc , the latter is more common. Remember [this] guy this is how he looks when he is not under extreme atmospheric pressure. [This] is how he looks in his natural habitat Furthermore deep sea is dark and cold. Creature who live there doesn't need eyes, or really any other sensory abilities. They need better to regulate body temperatuer, they need a structure that works under extreme pressure. Coincidentaly that looks extremly alien to us.They have some fairly extreme adaptations to very extreme conditions. In the deepest parts of the ocean; pressure is immense, the darkness is total; and there's very little food. There's no plants because of the darkness, so instead of being based on plants, the food chain is based on "marine snow", a polite way of saying "fish poop and miscellaneous scraps" that rains down from above. Because life down there is so sparse, it can be weeks between prey animals appearing - so these fish can't afford to miss even one, and in between they can't afford to move around much. So you end up with fish that are mostly eyes, mouth, and stomach; and instead of being athletic and counting on escaping from other fish; they try to be invisible to other fish.
Why laptops still use differrent chargers, and why they dont follow the example of the mobile phones?
$$$$$$$$$$$ Same reason apple uses its own cords. You have to buy them from the company that makes the laptop.Yo ho ho! Yer not alone in askin', and kind strangers have explained: 1. [ELI5: Why don't all laptops use the same power cord, like happened with cell phones? ]1. [ELI5: Why are laptop charger cables not standardized like USB, HDMI, ethernet, etc.? ]1. [ELI5: Why is there no Universal Laptop Charger ? ]1. [ELI5: Why aren't all chargers universal? ]
Why and how are power plants designed so they can't power themselves?
The plant isn’t technically incapable of powering itself—it’s incapable of running without a grid connection. That might sound like a distinction without a difference, but the plant requires a connection to the grid not to *receive* power from the grid, but to *dispose* of power on the grid. The nuclear plant requires a fraction of a percent of its own power to run. It simply cannot throttle down that low. Without a million kettles eating 99% of its output, it must shut down. If it kept running, the excess electrical power has to go *somewhere*, and without the grid as a safe outlet, the generators would destroy themselves. Shutting down the reactors and turbines is generally generally okay, because it has back‐up diesel generators to power the cooling systems and whatnot, but then the generator room floods and you’re in trouble.Appliances- home appliances or industrial machinery- need a very specific form of electricity. Cutting out some irrelevant details, it needs 110 or 220 volt AC. In the long-distance transmission grid, electricity is carried at, if memory serves, something like a quarter million volts. The dynamo at the nuclear or whatever other kind of power station produces some idiosyncratic voltage . At the power plant, there's lots of equipment for taking [whatever crazy format of electricity is being generated] and converting it to [the very specific high-voltage format needed for feeding the grid]. Where customers need electricity, there's [several layers of] equipment to turn high-voltage power into 110v. But nowhere in the system is there any machinery that can convert [7,000 volt AC, at 47hz, or whatever the power plant is producing at any given time] directly into 110v. That equipment, if it existed, would only be able to deliver power to the plant itself , and it's fiddly to work with. It's cheaper and easier just to have a small backup generator to electrify the equipment needed to run the power plant.
If Physics states that we don't actually touch anything, how can we taste and smell?
We don't really touch things, but that doesn't mean they don't interact. Magnets, gravity, electrical charges all do not physically touch things, but they interact because of the force emanating from them.Just because the atoms in our body don't physically contact other atoms doesn't mean that there's no such thing as "touch." For as long as the universe has existed, "touch" has just been "electrostatic interactions between the electrons of two objects." There's no reason to call that anything but "touch." Taste and smell are exactly the same way, like any other chemical process - the electrons of our body interacting with the electrons of other things. Particles interact with our taste buds or the receptors in our nose, nerves pick up the signal and send it to the brain, and the brain gives us feedback that we call "senses" of smell and taste.
How did people figure out precisely which direction to build a railway in before GPS and modern technology?
You'd be surprised how accurate tools like sextants are. They were around for a while before we started building railroads.Usually the railway as build along an existing feature, like a wagon trail or a river. If you know how to get somewhere by foot or horse, you know how to build rails to it. Also, you can accurately measure your position on earth to well within a mile with a sextant, an accurate clock, a compass, and an almanac. All of those things would be available to a 19th Century rail builder. Finally, straight lines were not always a priority. You build rail where you can, and keeping it as level as possible is often more important than keeping it straight. You might come out 50 miles north because that where the gap in the mountains was.
What allows our brain to "focus"?
The brain has a subconscious filtering system that decides which things are unimportant and which should be passed on to our conscious mind.
why does resting my hand between my thighs warm me up?
You have a lot of nerve endings that control your hands. Perhaps warming them *tricks* your brain into thinking you are more warm than before. Check out this [homunculus] to see the brain proportion that is dedicated to controlling certain body parts. As you can see, lips and hands require a lot of nerves and brain to control them Because you are putting your hands between two large fleshy appendages right near a major artery carrying warm blood from your chest.
What makes a substance nutritious?
A subtstance is nutricious when we can extract energy from it. That substance can be carbohydrates , fats, and amino acids from proteins. The body modifies these substances into one of the products that can be used in the so-called Krebs cycle. The Krebs cycle is a series of chemical reactions that releases stored energy from those substances in the cells. The end product is CO2 and adenosine *triphoshate* , an adenosine molecule with three phosphate groups attached to it. ATP is the transporter of energy in the human body. When ATP breaks down in an adenosine molecule with two phosphate groups and a free phosphate group, energy is released which can be used for metabolic processes in the body such as muscle contraction.
what is the difference between vague, ambiguous (semantic), ambiguous (syntactic), ambiguous (grouping), overgeneral, or both vague and overgeneral.
Kind of confused about what you're asking for. Is it assignment-specific jargon? The difference between 'vague' and 'ambiguous': Vague - Lacking detail but has specific meaning. e.g. Joe is tall. How tall? Joe is tall compared to what? Ambiguous - Several meanings or open to interpretation. e.g. The concert was cool. Does the speaker mean that the concert was enjoyable or do they mean something to do with the temperature?
what is magnetic flux?
Say you have 100 water hoses stacked in a square and pointed at a house. The window is open. On the hoses hit the window go in the house, the rest just hit the wall. Magnetic flux is when you take the magnetic field and multiply it by the area of a given thing, say a hoop. The magnetic field is like the water hoses. The area is like the open window. The magnetic flux is like the bit of water that gets into the house through the window. Now pretend that you are shooting the water at the house at an angle. Or you lifted the house and turned it at an angle. Less water will get into the house because the open area of the window that can be shot at by the hose is smaller. If you turn the house completely sideways, the water can't go into the house at all because you are shooting at the wrong side now. In the same way, if you turn a hoop on it's side, less open area is available for the magnetic field to go through. If you turn it comepletely sideways to the magnetic field, none of the magnetic field can get through. The equation is BAcos=magnetic flux. B is the magnetic field. A is the area. The angle is how turned the hoop or house is Cos is what percentage of the water gets into the house from the hoses that would normally shoot water in if the house was head on.
why isn't single serve coffee sold in tea bags?
Didn’t Folgers used to make “coffee singles” in the past? I’m not sure if it was instant or supposed to act like a brew, but I’m almost positive I’ve seen something like itIn Australia you can buy coffee bags. These ones are sold everywhere. _URL_0_Coffee and tea diffuse differently, tea diffuses through simple immersion, whereas coffee diffuses most effectively when force assisted. For this reason coffee is generally either made with a pump, gravity drip, or percolation, whereas tea is just allowed to seep. Additionally tea-bags were a complete accident, they were originally silk bags sent out containing a sample of the teas but consumers thought that they were meant to be used in place of existing diffusersHere, you can: _URL_1_ Fwiw; it makes a terrible cup of coffee
Why can we build 1TB SSD's but not 1TB of RAM and cut out the storage?
We can make a terabyte of RAM but it would be really expensive and couldn't store data when the computer was off. Also we really don't need the incredibly fast access for the vast majority of that data.Totally different systems. Ssd are slower to access, and can store data without power. Ram is a super fast access, but requires power to store dataWe can. It would be faster, but RAM losses all its data when you turn off your computer. So for storage it wouldn't be very good. Also you can't really "cut out the storage" on your computer. Think of doing your homework. Storage is like your textbook and RAM is like a piece of paper you take notes on. So if you did make 1TB of RAM and used it as storage, your computer would still need 16GB of RAM to use as RAM, for when it just needed to temporarily saved something during a process. Now to answer why you don't need 1TB of RAM but need 1TB of storage, well it is the same as my first example. If you are doing your homework you don't need a 500 page notebook for taking notes, but your textbook might be 500 pages.It's faster than SSD but is volatile. This means that it needs power to retain its memory contents.
Does a gas giant actually have a solid surface?
The "surface" of Jupiter is gaseous hydrogen.\r_URL_0_\r\rWhat would happen if you went "on" the top of Earth's gaseous atmosphere? You 'd fall, right?\r\rJupiter is much more massive than Earth though, so you 'd fall even faster, and probably burn up from friction with the atmosphere before anything more interesting happened .
Where do birds keep their bone marrow?
According to our friends over at /r/askscience: > Birds have bone marrow it just doesn't intersperse through the central region of bones like in humans. Avian bones aren't hollow in the sense that they're like straws with absolutely nothing inside them. There are networks of structural fibers that help give their bones strength. Bone marrow is likewise interspersed and around the hollow cavities in a bird's bones. They also linked to [this image] showing a cross-section of a bird's bone. [Source]
How does evolution explain an animal developing the ability of venom attacks? Like a Platypus?
As [this] link will tell you, many venom systems started out as something entirely different whether they be digestive enzymes, proteins to help fight bacteria, etc. A mutation occurs and suddenly that enzyme/protein/etc is present in the mouth/claws/etc, and it gives them an edge to catch prey and just generally survive. Each instance of venom in an animal seems to have developed on its own, so you aren't going to find two for the exact same reason. We are still learning about the subject though.
Why are games being exclusive to a particular console "bad" and why is this exclusivity deal Netflix has secured "good" ?
You're currently comparing two things in different ways. I understand the confusion but you're just getting it a little bit twisted. I'm not a gamer, but here goes my attempt at an explanation. 1. A game being only available on ONE platform is bad for the game due to the fact by only being on one console, the potential market share is now cut in half. A show/movie being only on one platform is bad for the show/movie because anyone who doesn't have that medium of streaming is now unable to enjoy that content. 2. A game like HALO is GREAT for a console. If Halo hadn't of come out when it did I don't think the original XBOX would have survived. People who are loyal to a game franchise will probably buy that console just to continue playing those games. A company like Disney signing an exclusivity deal with Netflix is GREAT for Netflix. People who love disney/star wars will go with Netflix as their main streaming provider for the ability to view that specific content.
What gives massless particles a 'speed limit'? What stops them from traveling faster than 299,792,458 m / s?
Simply put, we don't know. It's a very well documented and solid physical constant, but why that happens to be the universal speed limit isn't clear. There's some speculation and models that attempt to describe it, but nothing verifiable as of yet.
Why can I remember the conventions of a new programming language or the methods of a new library with ease but spend hours memorizing facts in biology class to no avail?
As a fellow student learning programming with ease and dying in biology, I feel your pain. I can't possibly explain for you without speculating, but for me it's because of the style. Biology is a very fact-oriented thing. You either know what allopatric means, or you don't. And you never get to actually use it, because you can't "use" biology terms. It's a field of science, not of engineering. For CS, you already know what these words mean, you're just learning new ways to apply them. It's about learning processes, not facts. And you use these processes constantly. Computer Science is a field of engineering, not science. Also, like RandomReddithead said, interest is incredibly important. And the method of learning is a pretty big dealTeacher here, How are you learning each of them? Some methods are going to make a lot more information stick than others. Do you understand the biology in the first place in the same way you do a new method?The new programming language triggers your "want-to-learn" side, and biology facts just don'tWith programming, you are learning a language that you are using repeatedly throughout the day, every day. With biology you are learning facts that you do not need to recall repeatedly throughout the day or even once a day. The programming gets reinforced through use a lot more than the biology facts do. If you were to write yourself and answer a mini bio test every day it would help
Allergies; and why the body develops them.
Your body's immune system often causes your body to do less-than-desirable things. For example, when it's fighting a cold, it's your immune system, not the cold virus, which causes you to have a runny nose and sneeze lots. When something gets into your body which doesn't belong there, your body's immune system recognises that and gets rid of it. This doesn't just apply to viruses and other nasties. It can apply to things like pollen, or dog hair. When you have an allergy, what that means is that there are certain types of foreign bodies which your immune system over-reacts to - it doesn't just get rid of them, but it causes you to display some symptoms, such as sneezing, developing a rash, or being short of breath.
Humans mated with Neanderthals and have some Neanderthal DNA.What prevented their mating with other archaic human types?
It may have happened. It is hard to prove. DNA degrades with time. Only in special circumstances, cold dry caves, does some DNA survive for thousands of years. To prove it you must have DNA from the different humans to have lasted since then. It is extremely unlikely to find DNA much older than what has been found. Jurassic Park was only a movie with a slightly plausible story line. There has been a lot of study of the human genome with a lot of fascinating, deductions about the past.The ancestors of modern humans also interbred with other archaic human types, such as Denisovan Hominins. The only true barriers would be time and place
why does Adobe Flash Player need to update so much?
Adobe Flash is, by Internet standards, a very old format. It comes from the days where every byte and every CPU cycle was very important. This meant that it used various tricks to save space and computer effort. The programming to work with these tricks is complex, and complex programs have places for bugs to hide, and hide they do. There are bugs that have always been there, waiting for someone to send the program a strange flash file and make it do something wrong. There are bugs caused when modern programmers forget they are working with old code, and are not 'defensive' enough, assuming that the code will do checks that were too expensive decades ago. There really is only one solution for this - flash has got to go. There is no longer a need for it, as javascript and HTML5 can do everything that Flash does. We just need everyone who makes websites to delete all their flash garbage.Almost all of these updates are in response to "security holes". Just like the vast media that flash player supports, it too has to constantly update its database to keep up with breaches. According to Heimdal Security: > Adobe Flash is one of the preferred methods that cyber criminals use to attack users worldwide New security vulnerabilities pop up daily, of which about half are critical . I hope I answered your question to your satisfaction :)Because it has lots of security holes, with new ones being discovered all the time. Why has it so many security holes? Because it tries to do something *extremely difficult*: allow code from any website you visit to run on your computer without allowing that code to do anything harmful to you. This is very hard to do, and pretty much nothing manages to do it perfectly. But how many security holes there are depends a great deal on the basic design , and e.g. Javascript engines nowadays have far fewer problems than Flash.
Is it better to brace your body or stay loose in an accident/fall?
Obviously every crash is different and some things will work better in one situation than they would in another, but the brace position in an aircraft crash, or bracing against a car seat have a very specific purpose. In any collision there are multiple impacts. In an aircraft crash there is the impact of the plane hitting the ground, you hitting the inside of the plane , and your internal organs hitting the inside of your body. The brace position is an attempt to remove, or at least lessen, the second of those impacts: you hitting the inside of the plane. By placing your body against the seat in front of you, or against your legs you are already against the object you are likely to hit and will therefore push against it instead of impacting itA dancer perspective. In a regular fall, it is neither better to brace or be loose. The idea is to spread the impact across a rolling point of your body. To rigid and and the impact is to one point on the body. To loose and and you are not spreading the impact enough. The ideal way to fall is to turn it into a rollIF you fall out of a plane try to land like this, also known as the five point landing. _URL_0_ > the balls of the feet > the side of the calf > the side of the thigh > the side of the hip, or buttocks > the side of the back With this technique in theory you should be able to survive a fall from any height. Now you will probably break every bone in your body but you could theoretically surviveNot sure but I was always under the impression that loose and relaxed can cause less injury. I have been taught that being loose is often the reason drunk drivers can get into horrible wrecks and live, while their victims do not-- because the drunk is more relaxedI 've heard its better to stay loose. Saw something years ago where they were saying that drunk people tend to survive or walk away from these horrific crashes because their bodies were "loose", absorbing impact better.
Why can e-cigarette companies advertise on TV while traditional cigarette companies can't?
E-cigarettes don't have tobacco in them, they're a smoking accessory. It's like advertising a cigarette lighter
Why I can't look in different directions with my eyes.
You can. Back in 2006 while doing "How to [cross] just One Eye" and "Speak with an Echo," I got ambitious and tried inducing [MartyFeldman-o-vision]. I had some fresnel prisms left from a failed toy design[1] which only deflect a couple degrees. Mount on eyeglass frames to bend light inward. They gave double vision, but I couldn't fuse stereo images. So I took one out. Success! After a few minutes my eyes compensated. I wore these glasses for about half an hour, then whipped them off while in front of a mirror. I could barely see the "walleye" effect. And my eyes returned to normal within seconds. Now try to teach yourself to aim one eye upwards, other one down. Or dilate just one pupil while contracting the other. Use it to fake brain damage. . [1]failed toy design: fresnel-prism glasses which make you feel tall by bending light vertically. They sorta work. More like, make gravity tilt backwardsbecause your eyes have to work together to tell depth and some small detailsTwo eyes are better than one, and for them to work the way they're ment to, they need to work together. Humans are like an HD TV. We see in vivid colours, we see in 3D, we can see far away, and we see things more clear than most animals do. We may "lack" in other senses compared to most animals, like how a dogs smell is out matched to a humans, but a humans vision is out matched to a dog. For our wonderful vision to be wonderful, two eyes work together to create a vivid full coloured 3D picture. Moving both your eyes automatically focus on subjects you're looking at. Whether far, or close, both eyes see the same thing to see perfectly. Moving one a different direction will make things blurry.
Why does western society treat sex as something taboo?
This isn't really a concept question. Europe and America both "western societies" have different views on sex and display of it. US views on sex is still largely influenced by our Quaker and Puritan heritage. Your question needs some clarification and best for perhaps r/askhistorians
what actually is that feeling when you're falling in a dream and you wake up?
The falling feeling is from a hypnic jerk. Your muscles may twitch or spasm and your mind is trying to make sense of it. You think that you're falling. I believe the heart beating and the shortness of breath is an emotional response. It's kinda not really clear why this happens. Even though you are sleeping, there is a part of you that is monitoring your situation. It's like sometimes hearing your alarm clock radio in your dreams. On wiki: _URL_0_It says that a possible explanation is that it is a reflex we developed when humans slept in trees.
Why is it more quiet when it's snowing?
Many things at once make this happen: 1) Snow on the ground absorbs the noise around us, where as the hard surface of the roads bounce it off. Just like a room with carpet and curtains does not echo, but an empty room with floorboards does echo. Absorbing the noise makes it quieter. 2) Snow is soft and makes sounds quieter - walking in soft snow is quieter than shoe heels clipping on pavement. 3) More people stay inside and less people drive, so less traffic noise. 4) People that do drive, drive slower and more carefully, meaning less engine noise. 5) Birds and other animals come out less and make less noiseIn a non-scientific standpoint, I would think that there would be a reduction in sound coming from cars and trucks since people will be less likely to drive when it is snowing
what exactly is the purpose of dreaming?
No one's entirely sure. Some popular theories: --it helps us sort through the events of the day and create memories accordingly --it helps us work through the emotions of the day and reach equilibrium --dreams don't serve any purpose; they're just a consequence of some other process These aren't necessarily contradictory theories; for example, maybe dreams don't serve any point, they're just how our sleeping brain interprets the neural activity of our brain sorting through memories.
Why does water feel much colder in your mouth when chewing mint gum?
The ingredient in mint gum that gives that cooling sensation is called Menthol. The tongue can not tell the difference between Menthol and actual cold temperatures so that's why they feel the same. As a side note, capsaicin is why our mouths feel hot. Again, because this chemical tricks our tongue into thinking, it's on fire.
NFL followers, why are there so many people on the sideline while the game is being played? What is their role? Novice at NFL here.
Media people, cameramen, sound people, the other 80odd players not on the field, the coaching staff, the athletic trainer staff, the medical team, NFL officiating crew, security Add it all up and you usually have several hundred people on the sideline of a typical NFL game. It takes a lot of people to make that kind of televised spectacle happen.
Is it possible to become ambidextrous?
I highly suggest posting this over at /r/askscience to avoid hundreds a meaningless anecdotes being your answerWith enough practice, yes. I suggest tying your dominant arm to your torso for a couple weeks.I'm going to say no just to dissuade you from attempting to join our ranks.I had a step-grandparent who was naturally left handed, but as a child was forced to only use his right hand. End result was ambidextrousI did. Just practice a lot, and put an eye on everyday things that you could do with your dumb side to train it for the more complicated things, like writing and drawing
how does people you may know function on facebook work? Do people who have visited my profile pop up there?
Do you have their phone numbers or email addresses and have ever used the feature that allows Facebook to search your contacts for potential friends? If you've done that they will show up in your recommended friends. Sometimes it seems to be so sensitive as to suggest someone who I have only contacted once.People who are friends with multiple people you are friends with will show up on that list. If you accrue too many facebook friends then that feature will become useless.
How did some animals (lizards etc.) get an ability to regenerate limbs evolutionary?
All species have the capacity for regeneration, some to a higher extent than others. What you are referring to is called autonomy and in most cases it was developed as a defence mechanism that allowed an animal to escape by sacrificing a limb and then regrow a substitute one . A good example of this are certain lizards that will leave a part of their tail as a decoy to flee from a predator. The tail will grow back, however it will not have the same bone structure as the original one as it will be mostly replaced by cartilage. Edit: a very good example of this in humans is liver regeneration. A human liver will regenerate back to its original size even if 80% of it is removed.
Why, for some stereo speakers, does one stereo cut out before the other one when adjusting the volume to a very low setting?
Because the device is probably using a stereo potentiometer. One of the quality differences between cheap and non-cheap multi-channel potentiometers is how accurate the tracking is on the two channels.
Why do marathon runners tape their nipples?
They chafe against your shirt, they can even bleed. I didnt really take that seriously until I ran my first half marathon. It is a thingChafing. Some fabrics combined with continuous friction over one of the most sensitive parts of your body is not a good mixture.
Why do our voices sound robotic when we speak into the fan?
Because the fan blades reflect the sound back at you, like any hard surface will. The difference is the fan has gaps in it that are are whizzing past. So you're getting hard surface, gap, hard surface, gap and so on many times a second, and your voice gets reflected back with a similar on/off/on/off pattern. Your voice as a result gains a weird sort of metallic trill to it.
What actually prevents something from continuing to grow once matured and does any species max growth increase over the generations?
Genes usually stop growth when a pre-determined structure has completely formed. That is called determinate growth. Indeterminate growth means that the animal will grow all throughout its life, this is common with fish, mollusks and reptiles.
Why is Broadway and musical theater in general associated with homosexuals?
I think that a lot of the aspects of theater in general are socially viewed as feminine, adding a sort of femininity to male actors/ theater professionals. Also, it may have been influenced by Castratos in classical opera/other classical performance settings but that's 100% speculation.
In America, why are most street signs green while others are blue?
It depends on the type of sign, and, in some cases, the specific sign. [Here] is an overview of the different colors, while [here] has specific signs that make for good examples. Specifically, green is "used as background color for guide and information signs, and for legend on permissive regulation and parking signs" and blue is "used as background color for traveler services information signs, emergency evacuation route signs, and as part of interstate and some state route markers".
Why are ambulances at least in the US part of an outside company rather than owned by the hospital?
It is often more efficient that way. It costs money for hospitals to maintain a fleet of ambulances, and since their priority is running the hospital, the might not be very good at it. Let a single company specialize in ambulance service, and letting it serve all the surrounding hospitals eliminates redundancy and can save money for everyone.Hospitals do not all specialize in every service. Some are stroke centers, some have trauma, etc. You need to go to the right hospital for your likely problem. It's better to have the ambulances distributed according to demand for transport and just get people where they need to go. You also probably don't want the ambulances to have an incentive to take you to a hospital that may be further away or less well equipt to deal with your problem.
What constitutes a "side effect" in contrast to the effect in drugs?
A side effect is simply something outside the intended purpose of the drug. Even if it happened 100% of the time, it can be considered a side effect. For example, a common allergy drug also has a side effect of making one drowsy. You're buying it to be relieved of allergy symptoms, so the drowsiness is a side effect. But the side effect here is strong enough that the same drug is repackaged and sold as a sleep aid, in which case allergy relief is a side effect.
What is goodwill, and what role does it play in partnership businesses in Accountancy?
In accounting, we predominantly use something called the double-entry method . That means that when we spend money developing something, and incur cost, we also want to see it appear as an "asset", something we own - writing down both the cost and the asset are a sense check as we account. Some things we can pick up or touch - physical assets: property, plant and machinery / equipment. But some we can't: brand value, or perhaps the value of software. These are called intangible assets. Were we to acquire a company with lots of intangible assets, there would clearly be value in those assets - it's just that we can't really sell them or value them that readily. So we make a new category up, called Goodwill. Within a partnership, there is a fair amount of that intangible value: the value of what each of the guys brings to the partnership. Consequently, we need to find a way of representing that in the accounts. Generally, we take what we believe to be "sustainable" turnover, i.e. what the business makes in money, and multiply it by a given amount - this is the value of what the partners "bring to the table". As this doesn't really exist, it is classified as goodwill - just like the value of that software etc.
Why does sand stick to everything even though it doesn't feel sticky?
Sand sticks to things in many ways just like flour does. Flour particles aren't sticky at all , but small enough to be caught in tangles of fabric fibers, attracted by even the slightest charges, or "grabbed" by microscopic droplets of water or oil . Flour is many times smaller, so more sticks of course, but at the size level of a grain of sand a human body is covered in a rough shag of fibers, and sticky oil and water films. None of these hold on very tightly, but tight enough to resist gravity and most movement, so the sand doesn't just fall off when you stand up. Brushing the area is more forceful, and tends to knock off every grain of sand hit - but again, sand is so small it can "hide" in the fabric or get missed by a rough hand brushing.
What is the reason for "ancestor worship" in East Asia, and how did this cultural practice come about?
It's not so much worship, but remembrance, and being thankful for giving birth, and remembering their achievements. It's just kind of like say, if your mother died, you would go to her grave and kind of have a moment, remembering the person she was, and in the case of East Asians, laying out a table full of their favorite foods and pouring them a drink so that the ancestors can 'come to eat and receive bows' from his descendants. Dunno, I guess East Asians just make the whole remembering the past into a ritual/ceremony of sorts, that involve most of the family on major national holidays. And yes, we do eat the food that we 'serve' to our ancestors, and yes, it's usually really dank stuff we only get to eat on occasion . The difference is, in the west, maybe a family or two come to graves/memorials and just lay down some flowers, shed a tear or pour out a drink, but in East Asia, we have a ceremony of sorts of remembrance, laying out their portraits indoors, or going to their graves and setting up really good food, offering them drink and bows, and having fun with close family that all gathered .
How does swallowing SSRIs or any medication get the chemicals into your brain or other body part where it's required?
It is the same way food is processed. It is broken down and absorbed by the digestive tract, then distributed throughout your body via your bloodstream. Medications do not target a specific region.
The Obamacare birth control mandate.
Put in place by the US government to force health insurance providers/employers to include different methods of birth control on their employees plans at no cost to the employee. It stated that the mandate required all health plans to cover all contraceptives approved by the FDA. It covers pretty well anything you can come up withIt defines birth control as an essential health service. Health insurance plans are mandated to provide essential health services.
Why is it called the great recession, and not the 2nd great depression? What exactly is the difference?
It's called the "Great Recession" because although there was a strong recession, meaning a decrease in size of the economy, there was no depression, which is a longer period of stagnation following a recession. What characterized the Great Depression was that it took a long time for conditions to improve, whereas we recovered from the Great Recession quite quickly in America The Great Depression lasted for over a decade and had unemployment rates as high as 25% -- even with major publicly-funded programs to create jobs. What we went through a few years back saw unemployment rise to just over 10% and lasted a few years. It was nowhere near as bad as the Great Depression.