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How do babies find things funny and how do they know what is funny and what is not? | I *think* it has something to do with the fact that almost everything is unexpected for a baby. As long it isn't unpleasant, it might evoke the feeling that it is funny", 'What babies do interests us. It is a survival trait. An interactive child who enjoys us will literally be cared for more than if it were just like a... |
Why is a camera lense round when the image is rectangular? | The photograph is rectangular because the image sensor behind the lens is rectangular. The lens is round because it's much easier to produce a round lens than it is a rectangular one.**Why the lens is round.** Any rectangular lens is round when it's first made, then cut into shape. Making the lens rectangular when it d... |
Why it takes so long for some people to receive the Medal of Honor? | For starters, the person has to be nominated for the MoH by someone. That nomination needs to be backed by evidence. Then the nomination and its evidence has to go through multiple screenings. And, since the government is involved, that can take forever. If it were just a straight military award, it wouldn't take as lo... |
Why do I have to pay a debit card fee, but not for credit cards? | I'm assuming that you're referring to per-transaction fees, and not annual fees. Credit card companies want you to use credit cards because that's how they make money - if they charged fees, there would be less transactions made, and therefore less interest revenues. Banks want you to keep your money inside their vault... |
Why people who drink heavily appear to age faster. | You're probably only noticing the obvious alcoholics on the streets. There are plenty of functioning alcoholics working as lawyers, teachers, policemen, etc who are still taking care of themselves, wearing makeup, working out, and getting proper nutrition. You will rarely ever notice them and they will look like everyo... |
how do linguist find dead language pronunciation? | * they extrapolate from similar languages that are still spoken* they look at how names were transliterated into other ancient languages* often there are written records of sounds and poetry, from which we can learn what rhymed with whatTo add slightly more, one of our clues about classical Latin comes from a letter wr... |
Why we hear about new cancer treatments, but patients still just get surgery, chemo, and radiation? | Those new treatments are chemo Not all chemo is the same. We have much better drugs than we did 30 years ago. For example, in 1975, a patient diagnosed with breast cancer had a 75% chance of being alive after 5 years. Today, that's over 90%. |
Where does electricity go when it's not being used? | As OPsBestFriend has said, electricity is very difficult to 'store' anywhere. As a result, technicians in power plants monitor the amount of demand on the power grid closely, and will adjust the output of the power plants to meet the current . As an interesting aside, in the UK we experience an uncommon phenomena known... |
Are there any practical benefits to why volleyball shorts need to be tighter than skin and shorter than your ass ? | Studies have shown that it has a positive effect on tv ratings. But also it's because you have to make quick sudden movements in volleyball, so you want something tight to improve your mobility. They are normally made of a form-fitting material like lycra so you don't have to worry about them getting caught up or falli... |
how does spicy food create the sensation of heat? | Peppers contain capsaicin and related compounds which bind to and activate the receptors that detect heat. Black pepper works in the same way, except the compound responsible is piperine and in horseradish and wasabi, the compound is allyl isothiocyanate. |
With basic medical knowledge and basic supplies, how safe is the average childbirth? | Globally, a woman has about a 1 in 500 chance of dying. > As women have gained access to family planning and skilled birth attendance with backup emergency obstetric care, the global maternal mortality ratio has fallen from 380 maternal deaths per 100,000 live births in 1990 to 210 deaths per 100,000 live births in 201... |
What is a coma and can it be fixed? | Coma is a very broad term in the usual lay-men usage, but a common way to put is that it is a state wherein a person is unconscious for more than six hours. They can't be awakened and unable to respond normally to light, pain, and sound. The state their brain activity is in does not also show what is considered the nor... |
Why do most dogs like sticking their heads out of moving cars? | Imagine you can shove your head inside a kaleidoscope of swirling colours, an ever-shifting landscape of people and news and all these things flashing past. Human beings track visually, dogs track via their olfactory sense. Since dogs live in the now, it's a big party! Who *wouldn't* want that? n.b. I an not an animal ... |
What causes that feeling of falling when you feel tired and your eyes close while sitting? | That feeling is called a Hypnic Jerk. According to Wikipedia they can be brought on by "anxiety, caffeine, stress and strenuous activities in the evening. However, most hypnic jerks occur essentially at random in healthy people." Another study though attributed it to our far back ancestors that were primates and slept ... |
Why do .onion domains have such weird names? | .onion domains are actually the result of a hash function using the public key of the hidden service, so the result is a gobbledegook of alphanumeric characters. |
Why do most blockbuster movies go for the PG13 rating while the bestselling video games are rated M? | Because nobody enforces the M rating, and teenagers frequently purchase video games with parents present, while they go to the movies with friendsESRB interprets interactive realistic violence as being unsuitable for people under 17. MPAA interprets passive viewing of realistic violence as PG-13. Realistic violence att... |
Why can I 'continue' a dream if I go back to sleep quickly after waking, but not if a short amount of time elapses? Is there any studies on this phenomenon? | Yes there's lots! The theory is that because you are so close to that dream if you go to sleep again quickly, your mind is still focused on it and you can fall back into the same REM cycle and therefore a similar dream. REM is the stage of sleep where you have dreams and happens more frequently toward the end of your s... |
When building new constructions, why do commercial buildings use aluminum studs/framing and residential homes use wood studs/framing? | I know one reason aluminum studs are used if the walls are taller than 10 feet tall. It is much more cost effective to use alum for a 16 or 20 foot wall studThe main difference is the type of construction. Metal studs are fire resistant while wood framing is not. Upfront construction cost is higher for the aluminum stu... |
Why are some moles flat and others are raised? | It depends on when the prolferating melanocytes stop proliferating. Moles are actually a type of tumor, in which the melanocytes, which are the cells that produce the pigment in your skin, proliferate, but stop proliferating before they become cancerous . The progression of how melanocytes proliferate goes from simple ... |
Why NASA is trying to make a mars base, instead of a lunar one? | NASA has plenty of plans for a lunar base. In an emergency it's four days away, instead of 6+ months. You can return at any time, rather than waiting months for Earth and Mars to be in the right place in their orbits. It's an excellent place to test your hardware designs before eventually moving on to Mars. Mars is the... |
What causes a speech impedement such as a lisp, and is it possible to learn to speak without it? | I also had a speech impediment when I was young, and learned to overcome it with speech therapy. It didn't take very long . Later on in life, I had to have many teeth taken out and developed a speech impediment yet again due to the shape of my mouth changing, and I had to relearn how to speak all over again when I was ... |
How does my broken handsfree turn musics to instrumentals? | There's a pretty complex thing going on. Headphones use a TRS connection - which instead of having 2 dedicated wires for each channel it has 1 for L, 1 for R and 1 common ground. Due to the common ground, when things short *just* right, 1 of the 2 channels can become electrically inverted, thus any sound that is comple... |
How is hail formed? | hail is formed when water condenses and freezes in a cloud formation. Large hail is created when those frozen droplets get blown back up into the higher altitudes after collecting more moisture in the lower, warmer altitudes. This cycle repeats until the updrafts cannot keep the balls of ice up any longer. In a way you... |
How do computers take square roots? | Generally, the same ways you'd do it by hand- they're just way faster at it. If speed is more important than accuracy , there's a bullshit way related to the way computers store numbers internally with the magic number 1597463007 involved somewhere, you can read about it [here]. |
How did people freeze items/ have ice back before freezers? | Simplest way was to go to areas that were cold, find a frozen lake, and cut out some ice. For example, if we lived near a tall mountain we could send people up above the snow cap, find and cut up some ice, and drag it back down. Another method was to get as much ice as you could while it was frozen and storing it in a ... |
What is the "42" thing about? | It's from Hitchhiker's Guide to the Galaxy. There was a race of super intelligent beings that built a super computer to answer the "ultimate question" being what is the meaning of life. After a really long time they came back and asked again. The super computer responded with 42. It's a play on there is no answer to th... |
Is a building that got rained on during construction in worse condition than one that was not rained on? | Rain is not very problematic for construction. Wood used in constructions have good moisture resistance; they will not absorb moisture and lose their shape and firmness or allow for the growth of mold. Many other materials are either water resistant or are only poured or settled in the absence of water, or are simply n... |
Why do our ears pop on planes? | There's a tube that connects your middle ear to your throat. It's not always opened. When you change elevation a lot, the air pressure outside increases or decreases accordingly. The pressure inside your ear does not necessarily do so at the same rate unless that tube is forced open. So your ear drum has higher pressur... |
How could we stay on the same radio tune when we are driving? | The doppler effect does effect the radio, but not enough to mater. An FM station doesn't transmit on exactly one frequency. It spans a range of 100 to 200 kHz So you might think that 100 Mhz. In reality that is where the transmission is centered. On an old dial radio, you may not be exactly on the center frequency and ... |
What has changed in American law practice that makes Perry Mason books outdated? | If nothing else, I believe his introduction of new evidence to throw off the opposition would run afoul of court proceedings. The prosecutor would have run discovery on the evidence of the defense, and hiding it from them would potentially result in a sanction of some form.The big thing is that lawyers are not allowed ... |
In the event of a fire or firedrill, how does someone in a wheelchair get off the top floor? | Often they don't. Many buildings have fire refuges so you don't need to. You wait there until rescued. Lesser of two evils, I suppose.They make people sleds, that are behind the doors of the staircase, at least in my hospital and all the clinics we serve ..I think they get the wheelchair on there and back it down slow ... |
Why is it beneficial to measure the depth of water in "fathoms", rather than feet or meters? | Sailors used to measure how deep the ocean was by dropping a weight at the end of a long rope. Then, when they pulled it in, they measured how far down it went by how many arm-spans worth of rope they retrieved. One arm span, or about six feet, was deemed to be a fathom. The measurement isn't necessary anymore, but it ... |
Why do spray paint cans get colder when you shake them? | The can feels colder when you shake it because you're circulating the liquid inside the can, helping to draw heat away from the steel under your hand. |
Why don't Reboil water? Or is it ok? | Completely false. There's nothing wrong with boiling water a million times, other than the fact that you won't have much left.If you heat up some previously-boiled water in a microwave oven, it lacks dissolved air and microbubbles. So it can [superheat and explode.]. The problem is worse with polished ceramic mugs than... |
How did people get anything cold in hot places (i.e. Middle East, deserts, etc.) before things like refrigeration. | A long time ago, around 400 BC. Persians had ice in the middle of summer in the desert. It was brought in during the winters from the mountains close by in bulk, and were stored in specially designed, naturally cooled fridges. They were underground and had thick walls. . It was made of clay, eggs, goat hair, ash ..a li... |
The 'Begging the Question' Fallacy. | *Begging the question* is a certain kind of mistake people make when explaining something. It basically is when you say something without proving it. The way you usually see it when someone uses one statement to prove another, but then doesn't give any proof of the second one. Here's an example: "Eating spinach is heal... |
I work in a mall and during the early morning my cell phone runs fine but once many people start coming in, my data slows down considerably, what’s the cause of this? | It may not be possible to say for sure, but it is likely due to the number of people actively using the same cell tower. During a typical day, there are a lot more people using their phone inside the mall, and that places extra demand on the tower. In addition, being inside a mall may place a higher demand on the low f... |
What is the powder on the bottom of breads and what is its purpose? | Depending on the type of bread, its usually corn meal, and its used to prevent the loaf from sticking to the cooking surface or tray. The inside of many types of commercial ovens are one large area, and either accept large trays containing products to be baked, or are placed directly on the shelf of the oven. Source: M... |
what would happen to an overworked individual (e.g., a student close to exams period) if they didn't get sufficient sleep? | I have a mid term tomorrow along with work and the current time is 4:15, someone please hurry and awnser this question.Short periods of time you'd feel groggy and lose some sense of hand eye coordination along with motor skills. Long term lack of sleep comes with the above, more seriously, along with slowly losing your... |
Why is there an A, B, C, D and F, but no E? | E was for Effort. During the Red Scare in the '50s, they said effort was for communists and nixed it.Think of it as if there are only four grade segments. A, B, C, and D. Thats it otherwise you fail . hence F. ABCD for percentage-/rank-denoting grades. Other letters for other things. F doesn't exactly denote a percenta... |
Why do people worry about cars using lots of fuel while planes and ships use a lot more? | It comes down to volume and usage. An individual car will use less, but there are thousands of cars for every ship or plane, so in the end, a 10% fuel economy increase for cars will have a great net impact than a 10% economy increase for ships or planes. Usage comes in because ships and planes are commercial vehicles, ... |
- Why do pharmaceutical companies advertise non-OTC drugs on TV? | Because if you have that particular ailment and hear about the drug enough, you will ask your doctor about it. If the doctor keeps on getting asked about the drug from hi patients, he will start to prescribe it. Then big pharma makes more money |
How do SSD's fail diagnostic tests? | SSD drives read and store data in blocks. I think they're around 512 KB. When you save a file, even if the file is 7 B, you're going to write 512 KB - 7 for your data, and the rest is blank. The way you write to a block is first by wiping it blank and then writing your data. Physically, there are circuits that represen... |
Why does heat take just seconds to damage your body, but cool takes minutes/hours to damage your body? | Look at it like a phone and charger. If you put a load of energy into the phone , it'll do serious damage almost immediately. If you use an underrated charger, it'll put only a little energy in, but the phone will use more than it's getting and eventually die. Heat is just a form of energy, and your body needs just a c... |
If you melt two identical candles at the same time, would they have the same appearance as they melted? | Absolutely not. They'd have to be 100% identical and have to have 100% the same exact airflow and atmospheric content. Now if you *did* get conditions to be 100% the same, down to *every single individual atom* and *every single physical force* that interacts with the candle, then you *might* be able to get them to mel... |
Why is Tuberculosis (TB) so frequently forewarned in many medicine advertisements? What makes TB such a large factor with certain medications? | It is an infection that can lay dormant in many people without symptoms. Certain medications weaken the immune response allowing the TB to become an active infection. Once active, TB is very contagious and requires 6-9 months of multiple antibiotic treatments at least. One third of the world is infected with "inactive"... |
If most of the world's economies are growing, then where does all that "extra" money come from? | So when you look at the "value" of an economy, what you are really looking at is the value of the goods and services produced within that economy, not the amount of money that economy possesses. So you might ask how is it possible for an economy to grow without increasing the money supply. It's quite simple! Money move... |
why does more of my hair fall out after I shower? | The short answer is that it's because you're messing with it. Hair isn't a fixed thing: it's constantly growing, and it's constantly falling out, the same way dogs and other animals shed. It's part of the natural life cycle of the hair. So why does it happen more often when you shower? It's largely because the pressure... |
How does painless fatal injection work? | It's a drug cocktail, usually like three different chemicals. Basically, they are first rendering the person unconscious, then causing muscle paralysis and respiratory arrest, then the last drug is to stop the heart. It's supposed to be painless because the person is unconscious when the failure of the heart and lungs ... |
Why do we use AC current to get power to our homes, but most of our appliances use DC current? | All of the answers saying that AC performs better over long distances than DC are wrong. DC is actually slightly better for power transmission, as it doesn't suffer from the [skin effect], which basically increases the effective resistance of transmission lines for AC wires. The reason we use AC current in our power li... |
Why are our sexual organs also where the pee comes out? | In the very beginning fish had one hole ) that they did everything from . There may not have been any reason for this, evolution relies on chance to add new features and then natural selection to optimise them, so if by chance the various parts were added to the existing hole instead of a new hole then this would stick... |
What is the difference between a pyramid scheme and network marketing? | In a straight up pyramid scheme there's no product being sold. Money enters the pyramid only by recruiting new investors. In network marketing there's an actual product and money can be earned by selling the product. Some network marketing companies are thinly veiled pyramid schemes, because the product they sell is wo... |
What is the point of fraternities and sororities in college? | Networking. Historically, it was very class and race based, and the wealthy elite formed these clubs so that the 'right people' would be able to mingle with the other 'right people.' It's kind of devolved into much more of a party scene at college, but it still has the purpose of putting like-minded potential friends t... |
What happens to the brain when someone gets "knocked-out"? Are they like mini-comas? | If you get a hard enough hit to the head there is enough mechanical energy that gets transferred from the blow to the brain itself that a lot of nerve cells have spontaneous discharges. This is basically the same phenomenon that you'll experience if you hit the side of your elbow hard enough against something and feel ... |
Is there a limit to how far electricity can travel through water? | Kind of. Don't think of electricity like a fluid that flows. Think of electricity as tiny marbles that live in a maple syrup bath where gravity can pull you either up or down. Some of the marbles like to travel up and some like to travel down, depending on if they are charged positive or negative. Lightning is charged ... |
food fiber. Is it actually fibers? | Fiber is essentially undigestible sugars. There are 2 types of fiber, soluble and insoluble. Soluble fiber dissolves in water and is usually metabolized by bacteria in the colon. We often benefit from the byproducts of soluble fiber metabolism but it can also cause gas. Insoluble fiber is fiber that cannot be dissolved... |
Will we be able to visualize 4D objects using augmented reality? | Not in a better way than we already can. 3D visualizations on 2D screen are just a projection, they do not "fully" visualize the 3D object, but since we are used to living in 3D world, our brain can reconstruct the 3D structure from the 2D projection very well. But it's still only a projection and doesn't capture the w... |
how do networked devices allow themselves to be discovered using a named URL on home networks? | When you type in a URL your computer sends a request to a DNS server, something like "Hey DNS server! What IP is _URL_0_". The DNS server then replies something like "It's 123.12.3.4"And your computer uses that IP address to actually connect to the site. However when you type ".local" at the end, it tells you computer ... |
If the densest element a star can form is iron, then where do other denser elements come from? | Iron is the densest element a star can form through fusion. Fortunately, that's not all stars do. At the end of their lives they blow up, and that generates all the heavier elements as it distributes everything else into space.Things can fuse beyond iron, but it takes more energy than it releases. A star works because ... |
If theres no matter in space for, lets say, a rocket thruster to "push" on then how is propulsion work in space? | There's a phenomenon called the conservation of momentum which roughly states that there is this quantity, which we call momentum, that if you sum up all of it in a system before and after doing something, it should all add up to the same amount. Momentum is just the mass times the velocity, and velocity can have a "si... |
Where do all the chromosomes “go” during mitosis? | All the chromosomes split like the 1 or 2 you see in the pictures. It's just so much easier to see what's going on and to fit a diagram on the page without drawing every single chromosome. For example, [here's what mitosis looks like in onion cells.] The cells look really crowded and onions only have 8 chromosomes, so ... |
Why do I always have a problem with left and right, but never confuse up with down? | It could be because the human body is symmetrical left and right, but not up and down.According to [this article] it's a minor disability that is related to difficulties in spatial reasoning and is present in about 15-25% of the population. It is more common in left handed people, people with dyslexia, and people with ... |
Why is/was there a trend for double-badging automobiles, even when people recognize the brand name? | It's all about marketing. Taking the UK example, people in the UK may have heard of Chevrolet, but won't know much about it. By adding the GM subsidiary of Vauxhall to it there'll be more recognition, and understanding of where to go for purchasing, servicing etc. Overall, brand names are tending towards being global: ... |
what determines that a plant is a weed? | A plant is only a weed if you don't want it. If you plant a field of corn, anything that's not corn is unwanted. I n a residential yard, some people say dandelion is just a weed, but dandelion is a healthy, normal plant, and is even useful as nutritious leafy greens. Dandelion used to be eaten more widely until it beca... |
Why does our snot get runny when we're cold? | Wow, there's a lot of bad information here. When you're outside in the cold, your body reacts by constricting blood flow and moving all of the blood to the core, to keep the vital organs warm. This means that the nose gets less blood flow, less warmth, and less moisture, so mucus production slows down. When you get ins... |
Why countries sell each other guns | You sell things to other people to make money. For example, the US sells fighter jets to Israel to make money, yet national security isn't threatened because Israel is 1) far away and 2) a friendly nation . If you have surplus weapons and equipment sitting around at cost, then selling it makes sense. |
Why isn't there more focus on technologies to remove green house gases from the atmosphere, as opposed to just a reduction in the emitting of those gases? | To be as simple as possible, because the worlds atmosphere is literally self cleaning. Thanks to oceans, trees and weather patterns.Because let's say you invent something that scrubs all the greenhouse gasses from the atmosphere . You want to sell it? Who will buy without coercion? The guy burning coal to melt lead in ... |
Why isn't humanity freaking out about the fate of the ocean moreso than it already is? | It's a problem that occurs on a larger scale than a human lifetime and we're tragically short sighted.Where did you see that info about the ocean dying off in a 100 years? Sounds highly improbable. |
Why do images load from top to bottom? | They have to load in *some* order. Programmers chose top to bottom because it's as logical as anything else -- and because it's the same order in which monitors draw images. But it's an arbitrary standard. |
What are gas grades, and what does it matter if I put lower grade fuel in my car | Gas grades simply refer to the octane in the fuel. The higher the octane the "higher" the grade. Normally it means nothing to put the lower grade fuel in your car. Most cars are designed for it. The high octane fuel is required for engines with high compression. The octane gives the fuel a higher temperature ignition p... |
Zeno's infinite series paradox. | Well, the proof that it's wrong is that you *can* touch a pencil. It turns out that, when you sum up all those fractions of inches, you don't get infinity. Instead you get 1. |
Why only a marginal amount of seeds become trees? | A lot of seeds wind up being eaten by forest critters or land in places where they can't properly germinate. The saplings don't get enough sunlight because there's all these damn trees around etc. etc. Loads of reasons for small plants to die before they can become fully grown trees. you still need only 1 seed to make ... |
If someone can make a flashlight that runs off the heat from your hand why can't we use that technology in other machines that produce lots of heat. | Well, in the case of computers specifically, the problem is getting *rid* of that heat, not using it effectively. In a general sense, the issue becomes overall efficiency. Does it take more energy to manufacture the heat-converter elements than they can be expected to produce during their service lives? Flashlights, be... |
Why can a battery never be recharged to its full capacity once it has been used once? | Actually, this is wrong. Some batteries even have to get charged several times, until they get their full capacity. |
What is the benefit to denying climate change? | Because dealing with it means costs to businesses and regulation and Republicans hate those things with a passion. Deny climate change is an issue, [forbid scientists from testifying on scientific research], and businesses can keep on polluting away, wasting hydrocarbons, ignoring more costly but environmentally friend... |
why do most cars have their engine up front but are rear wheel drive? | Most modern cars are, in fact, front wheel drive. But in the past, rear-wheel drive had one big engineering advantage: the powered wheels didn't need to turn from side to side for steering. The mechanical joints for delivering power to wheels that aren't always pointing in the same direction are tricky to design. |
How come if I get in a very hot bath, it can momentarily feel cold? | Your skin can't actually detect temperature, it can only feel relative temperature to itself. If the relative temperature is very large you can only detect that there is a large difference and not in which direction it is. It's just an evolutionary artefact, because the appropriate reaction is the same, you move away f... |
Why haven't we been able to recreate the way fish gills pull oxygen put of water so that we can dive without tanks? | Because humans need a **lot** more oxygen than fish . Water doesn't hold enough oxygen to keep us alive if we were to mimic fish gills. |
The Crusades in the Middle East way back. | The Holy Land--what's now Israel / Palestine, or the site of most of the events of the Old and New Testaments of the Bible--had for centuries been ruled by the Byzantine Empire. That name comes from its capital at Byzantium, also known as Constantinople and present-day Istanbul. The Byzantine Empire was a Christian emp... |
Why aren't road signs slightly tilted? | Two reasons strike me Firstly snow round here doesn't stick to vertical surfaces unless it's blowing - and if it's blowing it would probably stick to the sign anyway. Secondly, you'd lose a lot of the self-cleaning that comes from rainfall.The snow might pile up on the back of the sign, and if it's wet/heavy enough can... |
How does my Fitbit know how many calories I'm burning? | It guesses, based on your movement and heart rate. Any info you give it about yourself makes it more accurate but its still an estimate.I have a Fitbit and the matching scales. I understand that the calories are based on gender/weight/age and activity level in a somewhat rudimentary calculation. Do you have the heart r... |
Why is the Devil portrayed as he is? | From the Gauls. They had a horned god who was master of the hunt. When Christianity was absorbing paganism, he was turned into the adversary. |
Why is bird feces white but all other animals are brown? | Bird's excrement is actually a combination of their "urine" and feces. Birds don't "pee" like mammals, they excrete all waste from the same orifice called a "cloaca," which is like a fancy butthole. The white junk is nitrogen and urea and other stuff that would normally be excreted in urine in other animals.Basically a... |
What happens when females with hemophilia go through their menstrual cycle? | That's not really blood, not all of it. It's the lining of the *endometrium*, the outer layer of the uterus that holds the egg after fertilization. If there's no fertilized egg, the body discards that tissue. |
How does plugging your nose when you swallow something awful tasting mask your taste buds from the flavor? | Most of what we call taste is actually our sense of smell. If you plug your nose, it prevents airflow from easily carrying the aromas from the food, up into your nose. So you don't smell as much, so it doesn't taste as strong. The airflow is restricted because the nose becomes a dead end cavity. Consider how you can op... |
Can a person have airborne food allergies for foods like tomatoes or carrots? | Yess, it could happen with any allergen. But the thing that causes the allergy has to be something that can release extremely fine particles into the air. Peanuts, as Snewzie said, do that very easy. Tomatoes on the other hand, never do that. nor do carrots. You'd have to go out of your way to grind them into a powder ... |
Why is cold metal kind of sticky? | Cold metal feels slightly sticky because if it's cold enough it will freeze some of the moisture that's on your skin. The warmth of your body melts the freezing but it's still cold enough to freeze briefly. |
How does cancer actually kill a person? | Tumors grow in an area of the body and divert resources needed for vital organs, and grow in space that is needed for vital organs. Eventually it metastasizes and spreads and begins growing in other parts of the body. Eventually the cancer impairs bodily function enough to cause deathCompromises functioning of organs, ... |
How is it legal for an employer to allow females to have ear piercings but disallow men from doing so? | It is sex discrimination. It's allowed because no one has challenged it.Do you have an example? Probably has to do with "Men with Piercings" not being a protected class. There's no law that says they have to hire you, and there's no law that says "refusing to hire on the basis of piercing is illegal". |
Why is a rainbow curved? | Rainbows are sunlight reflected inside raindrops. They reflect at a fixed angle due to the way water bends light, but they can be in any orientation. All the sunlight is coming from the same direction . If you take light from one direction change its path by a fixed angle in all directions, you end up with a circle. |
Why Do TV Shows That No Longer Air Still Keep Active Social Media Pages? | The Office still sells syndication rights and has merchandising, which both benefit from a continued media presence. Ask George Lucas where the big money is, and he'll tell you it isn't necessarily when the media property is first released.These shows still sell DVDs, content rights to other services and are still used... |
How are shows like Intervention and Drugs Inc able to document drug usage with no repercussions? | Journalism isn't termed the Fourth Estate for nothing. Journalists enjoy special immunity from any repercussions from reporting facts. They do not have to reveal their sources and cannot be compelled to report crimes they witness or document to authorities. This immunity is very important, because otherwise it would ma... |
Why does gargling warm salt water help soothe a sore throat? | Salt draws moisture and promotes osmosis. This is why salting eggplant or tomatoes makes them give up their liquid so they’re easier to cook with. In your throat, salt water “sucks” in two ways: it draws moisture out of any bacteria who have set up shop there, and it draws moisture out of your own swollen tissues, reli... |
How can someone die from one punch while UFC fighters and professional boxers can take hundreds of blows to the head and recover fairly quickly? | Professional athletes are tested for heart conditions and other things before every fight. They have to pass these tests medically for them to fight. I think this was more from him smacking his head on the ground hard when he fell backwards. |
If time is infinite, won't everything exist again in the future? | Just because something is infinite doesn't mean it contains all permutations. There is an infinite amount of numbers between 2 and 3, but none of them are 4. |
Why do i get dizzy when i cross my eyes? | A big function of the organ associated with balance, the cochlea and semicircular canals in the ears, actually help you keep your balance, by coordinating that information with your eyes. Ultimately it's they eyes that provide most of our balance information. Dizziness is a sensation that something seems to be "out of ... |
What is the difference between EDM and electronic music from the 90s and earlier? | Well in my opinion it's just a useful umbrella word, like "electronica." I'm well past the age of being part of that scene, but when I was, we only paid attention to genre labels as they pertained to very specific subgenres, like "drum n bass" versus "trance," for which the differences were very obvious. Sometimes ther... |
How does Synaesthesia Work? | The ELI5 version is that there are pathways in one's brain for information about sounds and separate pathways for information about tastes - but sometimes those pathways cross, or touch each other, and end up spilling information into each other. |
How mirrors are filmed in Hollywood movies? Why there is reflection of everything except cameraman etc. ? | Check the angle. It is always slightly off angle, so you see the reflection of the actor etc but never the sound-stage, director, camera, etc. You will very rarely see a straight on angled shot of a mirror, as this will show the cameraman etc. On the rare occasion that they need that straight on shot, they will use pos... |
Why can they make vodka taste like cupcakes but they can't make a cough syrup that doesn't taste like it was filtered through a car radiator? | The bad taste is intentional in many medications, in order to discourage kids from drinking the medicine accidentally. |
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