Why are oil stained napkins transparent?

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• Why are oil stained napkins transparent?
• Because of the curvature of the Earth, are nearby skyscrapers closer together at the base than they are at the top?
• Has there been an optimal design for a fan or fan blade created yet? If so, Why isn't it used in every application that requires a fan?
• Would brushing your teeth with Jack or any other high ABV booze actually work at all if you didnt have access to toothpaste or mouthwash?
• When a banana gets bruised, does the nutritional content of the bruised area change?
• Why do insects fly so erratically?
• What would the dicovery of the Graviton mean ?
• Why do objects become harder to break the smaller they get?
• Would it be possible to create the opposite of a microwave: something that rapidly makes a food item or drink colder?
• By what mechanism is a human being able to estimate the passing of time? What happens when this function is disrupted? Can you lose your sense of time passing?
• Dogs pant and humans sweat, so how do cats cope with the heat?
• Why the sound of thunder isnt continuous when we hear it but is somewhat "interrupted"?
• How does color blind glasses work?
• How do pressure cookers work?
• If the universe is always expanding, then what does it look like at the edge of the universe?
• The moon is so big, its gravity effects our tides. Does it also effect the magma inside earth?
• Suppose entire solar systems lit up in the night sky instead of just the stars. How big would these appear in our night sky compared to the dots we see now?
• What is the initial cause for different accents in regions that speak the same language?
• Why did NASA use a skycrane to deliver Curiosity to Mars?
• Does it take longer for a hot object to reach room temperature than a cool object?
• Why does paper break when wet?
• Why do 'fast' neutrons need to be moderated in a uranium reactor, but not in a fission bomb?

Why are oil stained napkins transparent? Posted: 05 Aug 2017 08:08 PM PDT If you've ever held an oil stained napkin to a light, you can see through it! This isn't the case with wet, water logged napkins. What causes oil stained napkins to be transparent? Is this property exclusive to lipids? submitted by /u/JustHaving_Fun [link] [comments]

Because of the curvature of the Earth, are nearby skyscrapers closer together at the base than they are at the top? Posted: 05 Aug 2017 05:47 PM PDT submitted by /u/Jimmie0708 [link] [comments]

Has there been an optimal design for a fan or fan blade created yet? If so, Why isn't it used in every application that requires a fan? Posted: 05 Aug 2017 08:05 AM PDT Hi, The question originates from seeing various designs for fans in general with varying degrees of air flow per speed and efficiency. I was looking at computer fans, ceiling fans, car radiator fans, windmills, AC fans, and more. I got to thinking that the design with the most air movement would find it's way as the defacto fan blade design standard and would be used in every application. Yet even in some applications as trivial as CPU/GPU coolers in computers we find fans with varying curvatures, angles, and gimmicks. Am I wrong for thinking that the most optimal design would/could/should be used everywhere with the only difference being speed to control the airflow (CFM)? Has it already been made and is it being held up by a patent somewhere? Sorry in advance, This has just been my shower thought for a few weeks and I haven't found any sufficient Google answers for it. submitted by /u/bintu [link] [comments]

Would brushing your teeth with Jack or any other high ABV booze actually work at all if you didnt have access to toothpaste or mouthwash? Posted: 05 Aug 2017 10:16 PM PDT submitted by /u/Lasidora [link] [comments]

When a banana gets bruised, does the nutritional content of the bruised area change? Posted: 06 Aug 2017 07:47 AM PDT submitted by /u/ten_rapid [link] [comments]

Why do insects fly so erratically? Posted: 05 Aug 2017 07:44 PM PDT I work outside and I can't help but notice how, at random intervals, insects will just come in and bounce off my face. Can't they control their flight a little better than that? submitted by /u/Shockeye0 [link] [comments]

What would the dicovery of the Graviton mean ? Posted: 05 Aug 2017 05:59 PM PDT When and if the Graviton is ever discovered what would that prove ? and what would be its utility ? submitted by /u/Nam-ra [link] [comments]

Why do objects become harder to break the smaller they get? Posted: 05 Aug 2017 11:29 PM PDT submitted by /u/MaxMhad [link] [comments]

Would it be possible to create the opposite of a microwave: something that rapidly makes a food item or drink colder? Posted: 05 Aug 2017 09:42 PM PDT submitted by /u/imperialpidgeon [link] [comments]

By what mechanism is a human being able to estimate the passing of time? What happens when this function is disrupted? Can you lose your sense of time passing? Posted: 05 Aug 2017 10:57 AM PDT submitted by /u/akdtse [link] [comments]

Dogs pant and humans sweat, so how do cats cope with the heat? Posted: 05 Aug 2017 05:43 PM PDT submitted by /u/majestic_failure [link] [comments]

Why the sound of thunder isnt continuous when we hear it but is somewhat "interrupted"? Posted: 06 Aug 2017 07:24 AM PDT submitted by /u/Johnathan012 [link] [comments]

How does color blind glasses work? Posted: 06 Aug 2017 07:17 AM PDT submitted by /u/KalleTheOne [link] [comments]

How do pressure cookers work? Posted: 05 Aug 2017 05:59 PM PDT I get that higher pressure raises the boiling point, but wouldn't that make it even harder to boil something or cook something? How does a high boiling point make cooking FASTER? submitted by /u/markyhundreds [link] [comments]

If the universe is always expanding, then what does it look like at the edge of the universe? Posted: 05 Aug 2017 09:38 PM PDT submitted by /u/Shaboyyy [link] [comments]

The moon is so big, its gravity effects our tides. Does it also effect the magma inside earth? Posted: 05 Aug 2017 02:56 PM PDT submitted by /u/everythingsbroken [link] [comments]

Suppose entire solar systems lit up in the night sky instead of just the stars. How big would these appear in our night sky compared to the dots we see now? Posted: 05 Aug 2017 07:43 PM PDT submitted by /u/Grayest [link] [comments]

What is the initial cause for different accents in regions that speak the same language? Posted: 05 Aug 2017 08:04 PM PDT submitted by /u/DUMson000 [link] [comments]

Why did NASA use a skycrane to deliver Curiosity to Mars? Posted: 05 Aug 2017 04:49 PM PDT How did NASA come to the conclusion that the skycrane was the best way to land a heavy rover on the Martian surface? What were some of the other strategies considered for the EDL (entry descent and landing) of Curiosity and why weren't those used instead? submitted by /u/FlyingSpacefrog [link] [comments]

Does it take longer for a hot object to reach room temperature than a cool object? Posted: 05 Aug 2017 08:27 PM PDT Assuming that both objects are starting at temperatures that are of equal magnitude from room temperature, which object would reach room temperature fastest and why? submitted by /u/JustHaving_Fun [link] [comments]

Why does paper break when wet? Posted: 05 Aug 2017 05:19 PM PDT Upon shopping today and getting caught in torrential rain causing the handle of my paper bag to give up, it begged the question; why does paper getting wet compromise the structural integrity? submitted by /u/CalvinKong [link] [comments]

Why do 'fast' neutrons need to be moderated in a uranium reactor, but not in a fission bomb? Posted: 05 Aug 2017 01:37 PM PDT Nuclear reactors use a moderator to slow 'fast' neutrons down to the point where they are likely to be captured by a U235 nucleus. But when you slam two pieces of weapon-grade uranium together, it doesn't require a moderator to make them explode. The high-energy neutrons seem to be absorbed just fine. Why? submitted by /u/mediacrawdad [link] [comments]

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Does smoke from a wildfire lower temperature in surrounding areas?

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• Does smoke from a wildfire lower temperature in surrounding areas?
• What are the effects of alcohol on human brain development on people ages 18-24?
• Many fruit are green before ripening, is this colour due to chlorophyll? If it is are the unripe fruit involved in photosynthesis?
• What's up with the Normal/Gaussian Distibution? What properties does it have that make it special? Does does one arrive at its probability density function?
• Does splitting an atom expel radiation? If not where does the radiation from nuclear explosions come from?
• Why were prehistoric animals so big, and after they went extinct, why did new animals not grow to such enormous sizes?
• Why does fire change colour with certain chemicals inside it?
• How does transmitting sound through radio waves work?
• Is there such a thing as absolute electric potential?
• Why do I only hear bass and low tones outside of clubs and shows?
• Why is water compressible?
• What impact do coffins and embalming have on the earth instead of decomposition?
• How come when I am driving fast, stationary objects make a woosh sound as I pass by them?
• What is the evidence that I.Q tests measure intelligence?
• How do we know that the Universe's law or constants never change?
• How do the antibodies in a blood donors blood behave in the blood recipients body?
• How high up the atmosphere can Carbon Dioxide go?
• What's the efficacy of antidepressants when compared to placebos in clinical studies?
• When they measure the distance between objects like planets and suns, at what point do they start the measurement?
• What is the difference (if any) between looking at the solar eclipse and just looking at the sun?
• How much do we know about the physical properties of different antimatter?
• Why does using a propane tank make it get cold?
• What would happen to a rocket if it launched straight up and didn't turn sideways?

Does smoke from a wildfire lower temperature in surrounding areas? Posted: 04 Aug 2017 06:32 PM PDT Living in British Columbia and with the current wildfires that are going on, does the smoke somewhat cool the area? On Wednesday and Thursday, the forecast predicted the temperature to be nearly 100F but felt like mid-high 80s instead. Where I live is currently engulfed from the smoke. Does this cool the earth by reflecting the heat rays back into the atmosphere/space? submitted by /u/BALDWIN_ISNT_A_PED [link] [comments]

What are the effects of alcohol on human brain development on people ages 18-24? Posted: 04 Aug 2017 09:18 PM PDT As a college student, I watch a lot of binge drinking and I've gone to my share of parties too. I've heard a lot through school about how alcohol stunts development in young people. To what degree is this true, especially in the young adult age group where people are mostly done developing physically. How much do different levels of drinking harm different age groups? (A few drinks every weekend vs once a month vs heavy regular binge drinking). I feel like there are a lot of biased answers on this topic so I'd love to see your sources! submitted by /u/searchandrescuespoon [link] [comments]

Many fruit are green before ripening, is this colour due to chlorophyll? If it is are the unripe fruit involved in photosynthesis? Posted: 05 Aug 2017 04:23 AM PDT submitted by /u/victoriasecretgalaxy [link] [comments]

What's up with the Normal/Gaussian Distibution? What properties does it have that make it special? Does does one arrive at its probability density function? Posted: 04 Aug 2017 05:04 PM PDT submitted by /u/Ando_Bando [link] [comments]

Does splitting an atom expel radiation? If not where does the radiation from nuclear explosions come from? Posted: 05 Aug 2017 03:21 AM PDT submitted by /u/Vrazel106 [link] [comments]

Why were prehistoric animals so big, and after they went extinct, why did new animals not grow to such enormous sizes? Posted: 04 Aug 2017 09:04 PM PDT Why is it that the "first round" of animals on the planet were so large, but after they all went extinct, new animals did not evolve into such huge creatures? submitted by /u/WannaD8MyFrog [link] [comments]

Why does fire change colour with certain chemicals inside it? Posted: 04 Aug 2017 02:58 PM PDT submitted by /u/CuteCottonCandyCat [link] [comments]

How does transmitting sound through radio waves work? Posted: 05 Aug 2017 01:29 AM PDT Could someone explain to me the physics of the waves when sound is transmitted and broadcast onto radio waves? How exactly do the two waves interact in such a way that the sound travels with the radio waves completely intact? Also how do radio frequencies that are close to each other not interfere with each other? submitted by /u/IWANNALIVEEEEE [link] [comments]

Is there such a thing as absolute electric potential? Posted: 05 Aug 2017 06:37 AM PDT let's say I have three metal plates, let's call them A B C, and a voltage source. I put A and B very very close to each other, and I use the voltage source to charge them like a capacitor, let's say A is positive. Then I remove the source and separate the plates. What are the potential differences between A and B and C? C's potential is 'unchanged' from its ground state. Is there some absolute potential (let's say zero?) that I can assign to it? Does this mean the B is negatively charged in some absolute sense? At this point I have a slightly positive A and a slightly negative B... Do their chemistries change because the number of electrons available has changed? submitted by /u/7Geordi [link] [comments]

Why do I only hear bass and low tones outside of clubs and shows? Posted: 04 Aug 2017 04:27 PM PDT I'm super curious as to why it seems like no treble or high pitches can make it through to the outside, and why the music sounds so muffled. submitted by /u/vondage [link] [comments]

Why is water compressible? Posted: 05 Aug 2017 04:13 AM PDT The general assumption is that water is incompressible. However, many sources (and many questions/answers here) say that in fact it is compressible, but only very slightly What I didn't see explained yet is: Why is water compressible at all? What part of water is able to "take less space" under high pressure? submitted by /u/WGP_Senshi [link] [comments]

What impact do coffins and embalming have on the earth instead of decomposition? Posted: 04 Aug 2017 10:09 AM PDT According to the ecology global network, 55.3 million people die every year. I haven't found any numbers regarding coffins, but I am imagine that many people use some method of embalming or preservation when they die. I also have to imagine that a body decaying naturally in the earth has much more nutritional, beneficial properties for the earth than a body sealed in a box or one that is embalmed. I might be asking this question in the wrong manner, if so I apologize. My primary interest in this question regarded the current state of the earth. Whether or not global warming or just about anything can or could be altered by this coffin phenomena. submitted by /u/winnercakesall [link] [comments]

How come when I am driving fast, stationary objects make a woosh sound as I pass by them? Posted: 04 Aug 2017 02:17 PM PDT submitted by /u/lazy-zebra [link] [comments]

What is the evidence that I.Q tests measure intelligence? Posted: 04 Aug 2017 07:40 AM PDT submitted by /u/SerialK1ll3r [link] [comments]

How do we know that the Universe's law or constants never change? Posted: 04 Aug 2017 12:04 PM PDT If all we know is from comparing the universe against itself, how can we actually know that our various discoveries on how the universe operate can't ever change? It goes against human instinct for sure, but has science actually proven that the universe isn't able to change itself? And since theories that the universe might be a computer simulation are becoming popular I feel this question is becoming even more relevant. In that case anyone outside the simulation could change the constants (for example, alter the speed of light slightly) at any time. But even outside easy-to-imagine ways in which the universe could have its constants changed, has science ever backed up the nearly-universal assumption that these constants couldn't change? submitted by /u/lacertasomnium [link] [comments]

How do the antibodies in a blood donors blood behave in the blood recipients body? Posted: 04 Aug 2017 02:51 PM PDT So obviously blood type is selected against the antibody response of a recipient using the ABO+/- system, therefore the donor must be screened for antigens that could induce an antibody response in the recipient. My question is what about the antibodies present in the donor blood? My intuition is that isolation from its origin lymphatic system blocks the antibodies from initiating any significant response as the recipients immune system could possibly be unresponse to the foreign antibodies. With that being said, certainly some free floating donor antibodies must react with the antigens in the recipient when receiving the blood. Does this simply occur in a negligible quantity without the lymphatic memory response to proliferate the defense? An example being an AB recipient receiving O blood ought to trigger a double rejection by the donor bloods limited antibodies to the recipients system, similar to if an O recipient received AB donor blood. submitted by /u/robindawilliams [link] [comments]

How high up the atmosphere can Carbon Dioxide go? Posted: 04 Aug 2017 03:39 PM PDT School Books taught me that Carbon Dioxide create a barrier of some form that keeps heat from leaving the planet. So which part of the Atmosphere does this "barrier" take form? Also, can Carbon Dioxide get blasted off from earth by the sun? submitted by /u/AoiMizune [link] [comments]

What's the efficacy of antidepressants when compared to placebos in clinical studies? Posted: 04 Aug 2017 06:27 AM PDT submitted by /u/rollice [link] [comments]

When they measure the distance between objects like planets and suns, at what point do they start the measurement? Posted: 04 Aug 2017 06:45 AM PDT Do they start at the center of the planet and how do they handle elliptical orbits? submitted by /u/_an_average_guy_ [link] [comments]

What is the difference (if any) between looking at the solar eclipse and just looking at the sun? Posted: 04 Aug 2017 03:01 PM PDT Everybody and their brother is freaking out about buying special eye protection for the solar eclipse. Is there something different about a solar eclipse that makes it especially damaging to peoples eyes? Why or why not? submitted by /u/BigBeaver2 [link] [comments]

How much do we know about the physical properties of different antimatter? Posted: 04 Aug 2017 12:42 PM PDT I was reading about anti-hydrogen. Presumably, you could have antimatter in the form of anti-x element. But, do we know whether the antimatter versions of the things would have the same kind of physical properties? I.e., is anti-hydrogen a gas? Would anti-copper be a metal? Is anti-copper possible? Do we know? edit: Thanks!!! submitted by /u/dillonsrule [link] [comments]

Why does using a propane tank make it get cold? Posted: 04 Aug 2017 02:02 PM PDT submitted by /u/loki143 [link] [comments]

What would happen to a rocket if it launched straight up and didn't turn sideways? Posted: 04 Aug 2017 08:22 PM PDT I understand that rockets turn sideways a bit after they are above most of the atmosphere to gain orbital speed, but what if it didn't turn? I assume that the rocket can still get to space just from sheer thrust. If it kept going and stopped around the ISS orbit, would it just fall back or start to orbit? submitted by /u/lordDAmaster [link] [comments]

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Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States

Why does ice stick to metal spoons?

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• Why does ice stick to metal spoons?
• How does the Sun send out EM radiation across the spectrum? Doesn't every frequency require a different process to happen?
• Do how come plane propellers don't torque planes out of balance?
• How does fire spread?
• Why do worms come out of the ground onto the footpath when it's raining?
• With a seemingly MASSIVE amount of historical data on all sorts of inputs, what is still holding us back from extremely accurate weather modeling?
• Dumb question, but if water is a bad conductor of electricity, then why do hair dryers and other bathroom appliances have warnings about not using them in water?
• How exactly are neutrinos and dark matter related?
• Why do rockets fly upwards instead of sideways like a plane lifting off ?
• What makes meth labs so dangerous?
• What could be done to increase the phase velocity of axons?
• Is there any credibility to the Solutrean hypothesis?
• If space shuttles and other spacecraft need heat shields to make it through the friction of atmosphere re-entry, why don't you need special suits when skydiving?
• How do ponds and lakes form?
• What protects astronauts from the acoustic shock of a rocket launch?
• If the sky is blue because it's a short wavelength, but rain bows have violet, why isn't the sky violet?
• Is it possible for there to be a planet whose moon rotates around it perfectly to where you could only see the moon if you were on the other side of the planet?
• Why is it that no matter how much liquid goes into a toilet, the water level always stays the same? (if it's not blocked of course)
• How did plants pollinate on early earth?
• How damaging are submarine lights to deep sea animals' eyes?

Why does ice stick to metal spoons? Posted: 04 Aug 2017 03:28 AM PDT submitted by /u/thelegitnightfuri [link] [comments]

How does the Sun send out EM radiation across the spectrum? Doesn't every frequency require a different process to happen? Posted: 03 Aug 2017 03:52 PM PDT submitted by /u/MarlinMr [link] [comments]

Do how come plane propellers don't torque planes out of balance? Posted: 03 Aug 2017 08:11 PM PDT Helicopters need a tail propeller to counteract the torque that is applied from the blades. But old biplanes are an example of a planes that only have one propeller so shouldn't the plane be off balanced by the torque applied to the propeller only in the opposite direction? submitted by /u/theycallmefuckoff [link] [comments]

How does fire spread? Posted: 03 Aug 2017 03:50 PM PDT Does fire spread, or does the heat from the previous flame match the autoignition temperature and make more flames? submitted by /u/BariumSodiumNa [link] [comments]

Why do worms come out of the ground onto the footpath when it's raining? Posted: 03 Aug 2017 03:12 PM PDT Whenever it rains, the footpaths in my neighbourhood are covered with hundreds of worms. Why do they come out of the dirt to lay on these hard wet surfaces? submitted by /u/Algernon_Asimov [link] [comments]

With a seemingly MASSIVE amount of historical data on all sorts of inputs, what is still holding us back from extremely accurate weather modeling? Posted: 03 Aug 2017 07:05 AM PDT submitted by /u/Toddzilla1337 [link] [comments]

Dumb question, but if water is a bad conductor of electricity, then why do hair dryers and other bathroom appliances have warnings about not using them in water? Posted: 03 Aug 2017 08:15 PM PDT I learned from chemistry class two years ago that water isn't a good conductor of electricity due to its inability to create ions. With that in mind, where is the danger (besides the ones obviously depicted on warnings) in water making contact with bathroom appliances? Do the metal parts and wiring pose a bigger threat, perhaps? (I'll delete this question if it's too rudimentary, but the thought of this popped into my head recently and I don't quite recall my chemistry too well) submitted by /u/K4M1K4ZE [link] [comments]

How exactly are neutrinos and dark matter related? Posted: 03 Aug 2017 06:41 PM PDT submitted by /u/Karmaa [link] [comments]

Why do rockets fly upwards instead of sideways like a plane lifting off ? Posted: 03 Aug 2017 01:47 PM PDT submitted by /u/gregorio02 [link] [comments]

What makes meth labs so dangerous? Posted: 03 Aug 2017 05:16 PM PDT It's widely known that meth labs are practically ticking time bombs, but what actually causes the explosion? submitted by /u/biggestsnake [link] [comments]

What could be done to increase the phase velocity of axons? Posted: 04 Aug 2017 03:13 AM PDT submitted by /u/pimpmastahanhduece [link] [comments]

Is there any credibility to the Solutrean hypothesis? Posted: 03 Aug 2017 11:35 AM PDT A lot of people distort the hypothesis of humans crossing the Atlantic Ocean through an ice bridge from Eurasia into North America with their own, contemporary political or social biases. Putting that aside, is there any credible evidence that shows whether the Solutrean people could have come to North America and become the Clovis people, or has that hypothesis been discredited? submitted by /u/filipinonugget [link] [comments]

If space shuttles and other spacecraft need heat shields to make it through the friction of atmosphere re-entry, why don't you need special suits when skydiving? Posted: 03 Aug 2017 09:14 PM PDT I'm assuming it has to do with the size and speed/terminal velocity of the object, but I'd like more detail submitted by /u/RyanTheTechie [link] [comments]

How do ponds and lakes form? Posted: 03 Aug 2017 04:04 PM PDT I kind of understand how lakes formed in the northern hemisphere by glaciers, but what about other ways they can form, and I just do not know how ponds form in the first place. submitted by /u/Alkazei [link] [comments]

What protects astronauts from the acoustic shock of a rocket launch? Posted: 03 Aug 2017 10:49 AM PDT From what I understand, the safe distance from a rocket launch is usually over a mile away. So what protects the astronauts from the harsh vibrations? submitted by /u/johnnyseal27 [link] [comments]

If the sky is blue because it's a short wavelength, but rain bows have violet, why isn't the sky violet? Posted: 03 Aug 2017 07:05 PM PDT submitted by /u/antiward [link] [comments]

Is it possible for there to be a planet whose moon rotates around it perfectly to where you could only see the moon if you were on the other side of the planet? Posted: 03 Aug 2017 05:51 PM PDT I know that our moon rotates perfectly to where we can only see one side of it but I had never heard of a planet where the moon rotates fast enough to where you would have to trek across the planets surface to the other side in order to actually see it. Is it possible to have a planet/ moon interaction like this? submitted by /u/Login__Failed [link] [comments]

Why is it that no matter how much liquid goes into a toilet, the water level always stays the same? (if it's not blocked of course) Posted: 03 Aug 2017 07:28 AM PDT submitted by /u/MyNameIsSimon88 [link] [comments]

How did plants pollinate on early earth? Posted: 03 Aug 2017 04:15 AM PDT This is kind of a two parter. How did plants pollinate during the dinosaur era of bees weren't around? And earlier than that; how did the first plants on land get pollinated? submitted by /u/Apllejuice [link] [comments]

How damaging are submarine lights to deep sea animals' eyes? Posted: 03 Aug 2017 03:52 PM PDT submitted by /u/sphinctaltickle [link] [comments]

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