Where does Hawking Radiation fall on the EM Spectrum?

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• Where does Hawking Radiation fall on the EM Spectrum?
• Is there a depth under which the buoyant force is no longer sufficient to bring a diver back to the surface ?
• My water bottle is a stainless steel, double walled, vacuum insulated vessel. It claims to keep liquids cold for up to 24 hours but only hot for 12 hours. Why are these not the same or at least close to one another?
• How to remove oil off of salt without damaging it?
• Do sports like football/gymnastics affect skeletal growth?
• Do cases of extraordinary animal intelligence such as Alex the Parrot show how intelligent that species is, or are there "geniuses" within the species making them outliers?
• If even light can't escape the event horizon, how do Black Holes emit Hawking Radiation?
• Is a blackbody not in thermal equilibrium not emitting blackbody radiation?
• What is it on the atomic scale that makes materials either heat up/cool down slower?
• Why does X^0=1?
• What is the symmetry of the nuclear force?
• What are the ripples next to the atoms in the movie 'A boy and his atom'? (link in description)
• Is Quantum Tunneling a mechanism for Quantum Entanglement or are they separate?
• Can a neutron go straight through a nucleus?
• Would spraying boiling water over a fire put it out as effectively as room temp water?
• Can a super powerful laser attached in a spaceship provide the spaceship with thrust?
• What is the difference between p-branes, D-branes, M-branes, etc...?
• How much energy is required to alter earths orbit away from the sun?
• How do moons work? Would it be possible for a planet to gain or lose moons, and could we see it happen? Why do planets farther from the sun seem to have more moons? Can a moon have a moon?
• Why attraction/repulsion by diamagnetic or paramagnetic materials to an external magnetic field?

Where does Hawking Radiation fall on the EM Spectrum? Posted: 28 May 2016 03:51 PM PDT submitted by /u/TheHipsterLemon [link] [comments]

Is there a depth under which the buoyant force is no longer sufficient to bring a diver back to the surface ? Posted: 28 May 2016 10:47 AM PDT Hi askscience, I came across the story of diver Yuri Lipski who died while diving in the Blue Hole) He recorded his last moments in this video --- Warning: Death (non-graphic). This made me wonder something and it may be a stupid question but I thought I'd ask: For a human diver with normal gear i.e. just a bottle of oxygen, is there a depth under which the pressure of the water above exceeds the buoyancy force the diver is subject to, causing him/her to sink to the bottom ? Thanks in advance for your answers. submitted by /u/AlexandreFraysse [link] [comments]

My water bottle is a stainless steel, double walled, vacuum insulated vessel. It claims to keep liquids cold for up to 24 hours but only hot for 12 hours. Why are these not the same or at least close to one another? Posted: 28 May 2016 08:14 AM PDT submitted by /u/neregekaj [link] [comments]

How to remove oil off of salt without damaging it? Posted: 28 May 2016 01:29 PM PDT I grew some salt crystals and kept them in oil to preserve them. Now, I would like to continue to grow them. How can I remove the oil without ruining the crystals? submitted by /u/IntendedAccidents [link] [comments]

Do sports like football/gymnastics affect skeletal growth? Posted: 28 May 2016 08:20 AM PDT My parents always told me that regularly doing sports (especially playing football) at a young age (pre and during puberty) would make me taller. Is this actually true? I always thought skeletal growth is a 100% genetics and nutrition. Sorry if this question has already been asked and I assume it has but I couldn't find any satisfying answer using the search function. submitted by /u/hyusa [link] [comments]

Do cases of extraordinary animal intelligence such as Alex the Parrot show how intelligent that species is, or are there "geniuses" within the species making them outliers? Posted: 28 May 2016 05:48 AM PDT submitted by /u/MrArtless [link] [comments]

If even light can't escape the event horizon, how do Black Holes emit Hawking Radiation? Posted: 28 May 2016 10:16 PM PDT My hunch (and I'm completely uneducated on this subject like most) is that since gravity works on photons depending upon the energy they carry, since the gravity of a blackhole would be very high but not literally infinite, except perhaps at the singularity, if that really exists?, a high wavelength, low frequency photon could escape the black hole's gravity? submitted by /u/johnVanDijk [link] [comments]

Is a blackbody not in thermal equilibrium not emitting blackbody radiation? Posted: 28 May 2016 02:07 PM PDT I'm confused about why it's always important to mention black bodies at thermal equilibrium. Isn't it true that any two similar objects at thermal equilibrium would emit and absorb the same amount of thermal radiation? From wikipedia: A black body in thermal equilibrium has two notable properties: -It is an ideal emitter: at every frequency, it emits as much energy as – or more energy than – any other body at the same temperature. -It is a diffuse emitter: the energy is radiated isotropically, independent of direction. So suppose you had one blackbody at 100K and another at 500K. Is the radiation emitted by the cooler one not considered blackbody radiation? If so, why? submitted by /u/NewStandards [link] [comments]

What is it on the atomic scale that makes materials either heat up/cool down slower? Posted: 29 May 2016 05:28 AM PDT submitted by /u/Strike_Fast [link] [comments]

Why does X^0=1? Posted: 28 May 2016 05:16 PM PDT submitted by /u/sundubujjigae [link] [comments]

What is the symmetry of the nuclear force? Posted: 28 May 2016 04:00 PM PDT I know that the nuclear force isn't really a fundamental force, it's just a weird mechanic caused by the strong force at larger scales, but since it's treated as more of its own thing than magnetism is I would imagine it would have its own symmetry If I had to guess, I would say it's probably SU(2)xSU(2)xU(1) since it has two groups of three bosons (rho and pi) and a seventh (omega), but my knowledge is extremely spotty and I don't understand 99% of the math in play submitted by /u/chunkylubber54 [link] [comments]

What are the ripples next to the atoms in the movie 'A boy and his atom'? (link in description) Posted: 28 May 2016 08:11 AM PDT I was watching the movie made by IBM Research 'A boy and his atom' (link: https://www.youtube.com/watch?v=oSCX78-8-q0) and noticed there's ripples surrounding every atom (and even in some places where there appear to be no atoms but no idea if it has to do with something that had been there behind the scenes or something). I've read the atoms are carbon monoxide molecules, one atom on top of the other, on top of a copper substrate. Thanks in advance! submitted by /u/svletana [link] [comments]

Is Quantum Tunneling a mechanism for Quantum Entanglement or are they separate? Posted: 28 May 2016 06:26 PM PDT submitted by /u/TheHipsterLemon [link] [comments]

Can a neutron go straight through a nucleus? Posted: 28 May 2016 09:35 AM PDT If its fast enough I think it may be possible but maybe the amount of kinetic energy required will cause it to react anyway? submitted by /u/Skrrtx3 [link] [comments]

Would spraying boiling water over a fire put it out as effectively as room temp water? Posted: 28 May 2016 02:08 PM PDT Was thinking about sweating and water evaporating and somehow my mind stumbled on this question. I can think of a few different reasons why this may just be a bad question but figured I'd ask it anyway! Thought process here is: I guess pouring water on a fire cools it down both by direct heat transfer (water is cooler than whatever it is that's on fire) and by taking energy from the fire and evaporating (maybe this isn't accurate and my understanding of evaporation [and possibly also fire] is shitty?). So if water is already at or near boiling point, it needs less energy to evaporate and doesn't take as much from the fire? submitted by /u/doodledeedoodle [link] [comments]

Can a super powerful laser attached in a spaceship provide the spaceship with thrust? Posted: 28 May 2016 05:45 PM PDT Or is it like trying to throw a ball inside a spaceship which will result in 0 force?And if this could work,how much small force can a laser produce in a a spaceship? submitted by /u/Hollowprime [link] [comments]

What is the difference between p-branes, D-branes, M-branes, etc...? Posted: 29 May 2016 03:07 AM PDT What is the difference between these objects in string theory? Is there one? Also are the strings of string theory a type of 1-brane since they're 1D objects? submitted by /u/JimPlushie [link] [comments]

How much energy is required to alter earths orbit away from the sun? Posted: 29 May 2016 02:57 AM PDT I just read about the red giant phase of sol, where earth would be inhabitable. So lets say we make a ring around the equator line or on a pole during summer so we could "move" the earth. Is that possible with fusion energy etc.? (this is far into the future, so technology is there, and we have all the time in the world) submitted by /u/Rashaei [link] [comments]

How do moons work? Would it be possible for a planet to gain or lose moons, and could we see it happen? Why do planets farther from the sun seem to have more moons? Can a moon have a moon? Posted: 28 May 2016 05:56 AM PDT submitted by /u/MasticateMyMuffin [link] [comments]

Why attraction/repulsion by diamagnetic or paramagnetic materials to an external magnetic field? Posted: 28 May 2016 07:25 AM PDT I cannot for the life of me figure out why diamagnetic materials are repulsed by an external magnetic field, I thought they had no magnetic moment. And also, if paramagnetic and ferromagnetic materials both have at least one unpaired electron, why do only some of them become permanent magnets? submitted by /u/lonestarphysics [link] [comments]

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Whats the difference between moving your arm, and thinking about moving your arm? How does your body differentiate the two?

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• Whats the difference between moving your arm, and thinking about moving your arm? How does your body differentiate the two?
• Why is the bottom of the ocean so cold? With all that pressure, shouldn't it be ridiculously hot?
• Quantity of soap required to affect a given amount of oil?
• When the Falcon 9 reenters the atmosphere for landing, why doesn't seem to need a heat shield?
• If you could measure the distance from a singularity to the inner edge of a black holes horizon would it be infinite because of space stretching or would it have a set distance?
• Why doesn't light diffract through the 'mostly empty space' of an atom?
• What makes rubber bands "dry out" (become brittle)? Is there a way to make them last longer?
• Why isn't acetaminophen (e.g. Tylenol) formulated with N-acetylcysteine?
• Why don't fingerprints change if skin sheds constantly?
• How does a cell's size affect the rate at which it ages?
• Do automobiles go from 60 to 120 slower/faster than they do 0 to 60?
• What is the general consensus of counseling psychologists, on the use of hypnotherapy as an effective method of treatment?
• What determines the frequency and duration of a thunder?
• How is a mercury based ferrofluid made?
• In devices that require multiple batteries (like say, an xbox controller) do both batteries lose same amount of charge over time? What would the battery-life expectancy be if I changed only one battery, when both old ones are dead?
• Since fruits and vegetables can be grown anytime in a greenhouse, do they taste better when they're in season?
• What happens to a star to close to a supernova?
• Are there known tidal effects on other planets?
• Are there any reactive materials that would have useful applications if not for our oxygen-rich atmosphere?
• During internal bleeding where does the blood leak to?
• Would we know if a distant galaxy was made up of anti-matter?
• What makes highly acidic and alkaline solutions so corrosive?
• What is the difference between "sun" and "shade" plants?

Whats the difference between moving your arm, and thinking about moving your arm? How does your body differentiate the two? Posted: 27 May 2016 08:08 PM PDT I was lying in bed and this is all I can think about. Tagged as neuro because I think it is? I honestly have no clue if its neuro or bio. submitted by /u/YeOlePiratePenguin [link] [comments]

Why is the bottom of the ocean so cold? With all that pressure, shouldn't it be ridiculously hot? Posted: 27 May 2016 08:28 PM PDT I was watching an Attenborough doco about creatures of the deep, and he mentioned that water temperatures drop drastically as you go deeper. That seems inconsistent with the drastic increase in pressure as you go deeper. This is all coming from my 1st year uni understanding of PV = nRT. My guess would be something like: warm water rises, cool water falls, you end up with a continuous cycle (like vertical currents) that regulates water temperatures even very deep in the ocean. submitted by /u/flashaaahhaaahh [link] [comments]

Quantity of soap required to affect a given amount of oil? Posted: 28 May 2016 04:52 AM PDT I have a basic understanding that soap affects oils by trapping them in water-soluble structures called micelles, which can be washed away by water. But how much soap is required for a given amount of oil? submitted by /u/chocolatedessert [link] [comments]

When the Falcon 9 reenters the atmosphere for landing, why doesn't seem to need a heat shield? Posted: 28 May 2016 05:37 AM PDT Every craft in my memory seems to need a heat shield but here (https://www.youtube.com/watch?v=4jEz03Z8azc&feature=youtu.be) it seems to reenter without a problem. Is it going slower than capsules or shuttles would normally go, or is it returning at a different angle to reduce drag from the increasing air? submitted by /u/steveZISSOU22 [link] [comments]

If you could measure the distance from a singularity to the inner edge of a black holes horizon would it be infinite because of space stretching or would it have a set distance? Posted: 27 May 2016 07:40 PM PDT Basically I was thinking if the singularity of a black hole hit some unknown degeneracy limit and started pushing back outwards how much space could the singularity expand into? I know for all intents and purposes the inner workings of a black hole are basically separate from our universe, but I was wondering if anyone knew anything about this. submitted by /u/pwnangel [link] [comments]

Why doesn't light diffract through the 'mostly empty space' of an atom? Posted: 27 May 2016 07:36 PM PDT In this case, the 'the slit' is small enough for significant diffraction, right? submitted by /u/pearone [link] [comments]

What makes rubber bands "dry out" (become brittle)? Is there a way to make them last longer? Posted: 27 May 2016 12:37 PM PDT submitted by /u/GodIsPansexual [link] [comments]

Why isn't acetaminophen (e.g. Tylenol) formulated with N-acetylcysteine? Posted: 27 May 2016 08:30 PM PDT Paracetamol toxicity seems to be a very significant public health issue--lots of overdoses leading to deaths and liver transplants. N-acetylcysteine (NAC), used as an early "antidote" for acute toxicity, is seemingly well-tolerated, cheap, and minimally interactive with other compounds (including paracetamol itself). The MoA appears to imply that concomitant administration could effectively prevent toxicity from ever happening. So why aren't paracetamol formulations--particularly "prescription strength," high-dosage ones--commonly made with included NAC? It seems like a very straightforward way to make paracetamol safer, but there must be a good reason that this doesn't happen. Thanks! submitted by /u/Nyrin [link] [comments]

Why don't fingerprints change if skin sheds constantly? Posted: 27 May 2016 04:18 PM PDT Maybe this is silly, but I had a surgical incision on my thumb recently to get rid of a felon, and the skin on the entire top part of my thumb is shedding. Why doesn't my fingerprint change on my thumb? submitted by /u/aimeecuevas [link] [comments]

How does a cell's size affect the rate at which it ages? Posted: 28 May 2016 05:12 AM PDT e.g. accumulates misfolded proteins submitted by /u/inquilinekea [link] [comments]

Do automobiles go from 60 to 120 slower/faster than they do 0 to 60? Posted: 27 May 2016 02:48 PM PDT submitted by /u/cluckay [link] [comments]

What is the general consensus of counseling psychologists, on the use of hypnotherapy as an effective method of treatment? Posted: 27 May 2016 02:10 PM PDT Complete quackery or a viable option for treatment? submitted by /u/Shredder1219 [link] [comments]

What determines the frequency and duration of a thunder? Posted: 27 May 2016 01:28 PM PDT It's pretty self-explanatory. Thanks! submitted by /u/Katie_Deely [link] [comments]

How is a mercury based ferrofluid made? Posted: 27 May 2016 07:59 PM PDT submitted by /u/Bmw0524 [link] [comments]

In devices that require multiple batteries (like say, an xbox controller) do both batteries lose same amount of charge over time? What would the battery-life expectancy be if I changed only one battery, when both old ones are dead? Posted: 27 May 2016 11:36 AM PDT submitted by /u/Veteran0fPsychicWars [link] [comments]

Since fruits and vegetables can be grown anytime in a greenhouse, do they taste better when they're in season? Posted: 27 May 2016 04:45 PM PDT I don't buy out-of-season fruits at the store because I don't think they taste as good. My husband doesn't think my logic stand. submitted by /u/slowlyretarding [link] [comments]

What happens to a star to close to a supernova? Posted: 27 May 2016 01:48 PM PDT submitted by /u/DownFalldotcom [link] [comments]

Are there known tidal effects on other planets? Posted: 27 May 2016 03:25 PM PDT submitted by /u/freeintegraler [link] [comments]

Are there any reactive materials that would have useful applications if not for our oxygen-rich atmosphere? Posted: 27 May 2016 12:03 PM PDT There are a lot of elements/compounds that react (sometimes violently) to the oxygen (or water?) in our atmosphere. Are there any that would be extremely useful in everyday applications if it weren't for their reactivity with common substances and ubiquitous gasses? submitted by /u/Grava-T [link] [comments]

During internal bleeding where does the blood leak to? Posted: 27 May 2016 02:09 PM PDT I was always under the impression that blood vessels where more or less packed in surrounded by muscles and organs which wouldn't really leave much room for blood to pool into even if a vessel was ruptured. submitted by /u/brickmaster32000 [link] [comments]

Would we know if a distant galaxy was made up of anti-matter? Posted: 27 May 2016 12:43 PM PDT Would there be a difference in the light or radio signals or anything? Could there be huge amounts of anti-matter that looks just like matter? submitted by /u/FondOfDrinknIndustry [link] [comments]

What makes highly acidic and alkaline solutions so corrosive? Posted: 27 May 2016 01:24 PM PDT submitted by /u/Huomenna [link] [comments]

What is the difference between "sun" and "shade" plants? Posted: 27 May 2016 04:49 PM PDT Kind of a dumb question, but why is it that some plants do better in shade than in sun, or with less light in general? I can see where some plants would be better adapted to lower light conditions, but it seems to me that as photo synthesizers most plants would be happy getting plenty of sun. Thanks for your help! submitted by /u/Kharybdis97 [link] [comments]

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Difference between different types of Amorphous solids?

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• Difference between different types of Amorphous solids?
• Why do many materials, such as rock and wood, appear darker when wet?
• Is it possible to improve one's vision without glasses or surgery?
• If I were to stand in the middle of a completely sealed, spherical mirror with a light bulb in the middle, would the light build up to blinding levels, or just remain as bright as the bulb?
• Does the human eye see in frames per second?
• Why don't waves through water travel at the speed of sound in water?
• Couldn't the cane toad problem in Australia be solved by genetically modifying a few to have a dominant gene that makes the toad's toxin harmless to other Australian wild life?
• What's the difference between ADHD and depression if both are cause by low levels of dopamine/serotonin?
• Are there any plants that aren't evergreen trees that continue to photosynthesize, flower, and reproduce year round? If not, why not?
• When did climate change enter the public discourse?
• How is "true north" defined, and where is it located?
• How much neutron star material is required for its own gravity to be sufficient to maintain its density? Would a basketball-sized sphere of so-called "neutronium" be stable? Mountain-sized?
• How hot would it become inside a Dyson shell?
• I know of the competence-deviance hypothesis. Is there a corollary: the incompetence-tolerance hypothesis?
• How large would an object in low earth orbit need to be, to be visible to the naked eye from earths surface?
• How is energy conserved when light is red shifted from the expansion of the universe?
• Why are the different drops in this "oil spill" different colors?
• Could there be a loud sound so short in duration (billionths of a second) that our brains can't process it's existence?
• how do we know constants like the speed of light aren't different in far away parts of the universe?
• Are there any known diseases caused by mutations in our DNA that happen post birth?

Difference between different types of Amorphous solids? Posted: 27 May 2016 12:58 AM PDT So I'm doing a research task about glass, its properties, structure, production, and economic impact, but am having a problem finding a distinct difference in definition between a plastic and a glass. Both are amorphous solids, right? Both undergo a glass transition phase, right? Like plastics don't melt, but rather get softer and harder with or without temperature, and so does glass, so what is the difference by definition? I read that all glass are amorphous solids, but not all amorphous solids are glass. Please explain how this is so, thankyou :) submitted by /u/Racist_Zebraa [link] [comments]

Why do many materials, such as rock and wood, appear darker when wet? Posted: 27 May 2016 06:44 AM PDT While at the same time, materials like metal don't appear darker when wet. submitted by /u/Germy_Widemirror [link] [comments]

Is it possible to improve one's vision without glasses or surgery? Posted: 26 May 2016 06:34 PM PDT submitted by /u/coinsprinkler [link] [comments]

If I were to stand in the middle of a completely sealed, spherical mirror with a light bulb in the middle, would the light build up to blinding levels, or just remain as bright as the bulb? Posted: 26 May 2016 05:08 PM PDT Title basically says it all, but I imagine if you have a box full of bouncy balls, and you keep throwing them in there with infinite energy, adding more and more would increase the density of the balls in the box, so would the same thing happen with light? submitted by /u/ioswarrior67 [link] [comments]

Does the human eye see in frames per second? Posted: 26 May 2016 06:29 PM PDT submitted by /u/Raddud3 [link] [comments]

Why don't waves through water travel at the speed of sound in water? Posted: 26 May 2016 06:32 PM PDT Okay so in materials I know that most acoustic (and optical as far as I know) waves will travel through the material at the speed of sound in that material (i.e. tapping on one end of a metal bar and seeing the response at the other end) but there are examples of things that display "wave-like" properties that do not follow this rule. These examples could be releasing a spring (especially with a low spring constant) and water traveling in waves. So I am just wondering what causes this difference and why these phenomena are observed? My thinking, for the spring example at least, would be that the waves do travel through the spring or slinky at the speed of sound in the respective material but the overall response from the material happens over many waves with a slightly (atomically) larger response in one direction than the other with each wave? submitted by /u/ishya_boi [link] [comments]

Couldn't the cane toad problem in Australia be solved by genetically modifying a few to have a dominant gene that makes the toad's toxin harmless to other Australian wild life? Posted: 27 May 2016 04:29 AM PDT The cane toad is a big problem in Australia. There are no predators in Australia that can withstand it's toxin. Introducing an other foreign species is not an option, it's what got them in trouble in the first place. Getting rid of them by hand is fighting a losing battle, it creates just more space for more toads to reproduce. So couldn't problem be solved by genetically modifying a few to have a dominant gene that makes the toad's toxin harmless to other Australian wild life? submitted by /u/Albert_VDS [link] [comments]

What's the difference between ADHD and depression if both are cause by low levels of dopamine/serotonin? Posted: 27 May 2016 12:36 AM PDT submitted by /u/Calialley [link] [comments]

Are there any plants that aren't evergreen trees that continue to photosynthesize, flower, and reproduce year round? If not, why not? Posted: 26 May 2016 06:32 PM PDT submitted by /u/demosthenes19125 [link] [comments]

When did climate change enter the public discourse? Posted: 27 May 2016 03:51 AM PDT As I understand it, in the 1960s the idea was basically born that human action was having an effect on the environment, in the 1970s a lot of scientists thought the problem was global cooling and a lot of people used that to discredit climate change. In the 1980s it was considered a fringe conspiracy theory. When did it begin to gain credibility in the scientific community and with the public? submitted by /u/Adamj1 [link] [comments]

How is "true north" defined, and where is it located? Posted: 26 May 2016 03:40 PM PDT After learning that magnetic north and true north were two different locations, I was curious to find out where true north actually is. I assumed it was at 90 degrees latitude; however now I find out that's not the case. Wikipedia and the UK Ordinance Servery say that Grid North, which I assume is defined at 90 degrees latitude, is different than true north. If so, then what is true north? What defines it? Why does true north not line up with our map grid lines, and why have our maps not been changed to fit true north? What purpose does true north have? submitted by /u/ChemicalExperiment [link] [comments]

How much neutron star material is required for its own gravity to be sufficient to maintain its density? Would a basketball-sized sphere of so-called "neutronium" be stable? Mountain-sized? Posted: 26 May 2016 11:31 AM PDT In TIL today there's a post about how a teaspoon of neutron star material weigh 10 billion tons due to its density. If one were to take that 1 tsp. of neutron star material and place it in interstellar space would it's own gravity be sufficient to maintain its density and remain a teaspoon-sized, 10 billion ton mass or would it revert to 10 billion tons of normal matter with a reasonable density? If it isn't, would a basketball-sized sphere of neutron star material be heavy enough to maintain its stability? How about a mountain-sized sphere? Put another way, what would be the minimum mass of a sphere of neutron star material needed in order for that object to remain as dense as it would if it were on the surface of a neutron star? Once we've established how large that sphere is, how far would we have to be from it to experience 1g (9.8m/s2) of acceleration towards it? How about 0.1g acceleration since I don't want to become neutron star material by being drawn in to it and converted into degenerate matter? Disclosure: I'm not writing a (sci-fi) story nor solving a problem for a class. I have, however, read many stories with neutron stars being part of the plot so I'm curious about their properties as explained by actually physicists/scientists as opposed to clever sci-fi writers who may not have the latest information. submitted by /u/Amoyamoyamoya [link] [comments]

How hot would it become inside a Dyson shell? Posted: 27 May 2016 02:56 AM PDT Seeing how much radiation the sun is emiting, I imagine it would be quite hot. Also would the earth be liveable if the radius is 1 AU? Thanks in advance! submitted by /u/VitalDragon [link] [comments]

I know of the competence-deviance hypothesis. Is there a corollary: the incompetence-tolerance hypothesis? Posted: 26 May 2016 09:47 PM PDT I sound like an un-fun elitist, but I spend my time with adolescents, some of their relationships confuse me. I think this extends to most people I know, machines, media, games, and so on. Think about it. submitted by /u/eightpix [link] [comments]

How large would an object in low earth orbit need to be, to be visible to the naked eye from earths surface? Posted: 26 May 2016 10:26 AM PDT More noticeable than a star but not taking up a grand section. submitted by /u/46620 [link] [comments]

How is energy conserved when light is red shifted from the expansion of the universe? Posted: 26 May 2016 03:39 PM PDT My understanding is that the longer the wavelength of light the lower the energy of the wave. So how can energy be conserved as the light loses energy but the energy is not transferred to anything else? submitted by /u/12jake [link] [comments]

Why are the different drops in this "oil spill" different colors? Posted: 26 May 2016 03:57 PM PDT http://imgur.com/bxEl5Ca with enhanced color: http://i.imgur.com/UYuZxZO.jpg Post from /r/mildlyinteresting I understand how iridescence and refraction work more or less with different wavelengths bouncing at different angles, but why are different pieces of what I assume are the same material showing such differences in appearance? according to OP: "In the parking lot it was in, it could literally be any fluid in any quantity that goes into a car." submitted by /u/self_driving_sanders [link] [comments]

Could there be a loud sound so short in duration (billionths of a second) that our brains can't process it's existence? Posted: 26 May 2016 09:52 PM PDT I know our ears can only pick up a range of frequencies and decibel levels, but say there was an cataclysmic sound that happened in a millionth of a second, would human ears or brain be able to detect it? and is there a certain duration threshold that would make a sound like that audible or not? submitted by /u/industrial86 [link] [comments]

how do we know constants like the speed of light aren't different in far away parts of the universe? Posted: 26 May 2016 08:43 AM PDT Is it that whole 'the Earth isn't special' thing? Is there any way to scientifically prove that? submitted by /u/jelly_burger [link] [comments]

Are there any known diseases caused by mutations in our DNA that happen post birth? Posted: 26 May 2016 04:21 PM PDT I know there are disease from mutations inherited from parents (like sickle cell). It seems many diseases are environmental and not genetic. Considering mutations in our DNA accumulate as we age, are there any known ailments or diseases (or research into this subject) that can be caused by damage to our DNA that occured post birth? Sorry if my terminology is off. submitted by /u/BanalPlay [link] [comments]

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