How do odour sprays like Febreeze or Lysol eliminate odours in the air?

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• How do odour sprays like Febreeze or Lysol eliminate odours in the air?
• Why does a lack of oxygen cause cell death instead of the cell 'winding down' into some kind of stasis?
• What makes GPUs so much faster at some things than CPUs, what are those some things, and why not use GPUs for everything?
• Do surface imperfections significantly increase the surface area of an object?
• Why do I need an even number of triangles when creating a closed 3D figure out of triangles?
• Why do baryons have a half life?
• Are quotidian events stored differently in memory?
• Given that asteroids from Mars are found of Earth, would asteroids from Earth be found on Mars?
• Does chemistry matter when synthesizing superheavy elements?
• Can someone give me an idea how big 6!!! is? I understand 6! = 720 and 6!! = 2.6012189435657951E+1746. What is 6!!!? Can it be written out or described in terms of atoms of the universe or moments since the Big Bang or something?
• Does the momentum of light increase with intensity?
• Why are bats the reservoir for so many zoonotic diseases?
• How does an organism's body allow it to maintain the same amino acid composition in cells even when the diet of the organism is variable in different amino acid concentrations?
• How does your organism measure the time?
• Why do most chemical catalysts contain a second or third row transition metal, as opposed to a first row transition metal?
• What controls the height of cloud formations, why are some high up and some are low creating things like fog?
• Why do soft drinks and beers foam up a lot when you pour them into a glass but not soda water?
• Why is a detached, insulated but non-heated garage warmer than outside during winter?
• What is it about brain death that precludes the possibility of a person from being awakened?
• How do hashes work? Wouldn't there be one hash that could result in many, many input data possibilities?
• Since there is no perfect vacuum in space, is it possible to move in space using similar techniques like in air or in water?
• Regarding the obliquity of planets in the solar system, why are Venus and Uranus so different?

How do odour sprays like Febreeze or Lysol eliminate odours in the air? Posted: 13 Jan 2017 09:16 PM PST I understand adding a good smell but is there chemicals in it that destroys the odours from whatever youre trying to rid the room of? submitted by /u/laapse [link] [comments]

Why does a lack of oxygen cause cell death instead of the cell 'winding down' into some kind of stasis? Posted: 13 Jan 2017 11:03 PM PST submitted by /u/Zenquin [link] [comments]

What makes GPUs so much faster at some things than CPUs, what are those some things, and why not use GPUs for everything? Posted: 13 Jan 2017 04:29 PM PST I understand that GPUs can be exponentially faster at calculating certain things compared to CPUs. For instance, bitcoin mining, graphical games and some BOINC applications run much faster on GPUs. Why not use GPUs for everything? What can a CPU do well that a GPU can't? CPUs usually have an instruction set, so which instructions can a CPU do than a GPU cannot? Thanks! submitted by /u/Stuck_In_the_Matrix [link] [comments]

Do surface imperfections significantly increase the surface area of an object? Posted: 14 Jan 2017 04:27 AM PST For instance, is there a significant difference between a 1x1x1 cube made out of wood vs a mathematically perfect 1x1x1 cube? What types of material or what manufacturing methods having an interesting effect on this phenomena? submitted by /u/olafwillocx [link] [comments]

Why do I need an even number of triangles when creating a closed 3D figure out of triangles? Posted: 14 Jan 2017 06:47 AM PST While working on an assignment in class, I noticed something interesting. In order to create a 3D figure out of multiple triangles of the same size and shape I would always need an even number of triangles. Is this true and if so, is there a proof for it? submitted by /u/HighOverlordSarfang [link] [comments]

Why do baryons have a half life? Posted: 14 Jan 2017 04:41 AM PST I noticed that the proton has a half life of 1032 years. A neutron seems to have a half life of 10.3 minutes when not near a proton. Why is this? How can the quarks, which are bound together so strongly, decay that quickly? submitted by /u/olafwillocx [link] [comments]

Are quotidian events stored differently in memory? Posted: 13 Jan 2017 09:04 AM PST Every day I do very similar things: take shower, put contacts in, take medicine, fill water bottle in backpack, etc. Sometimes it's genuinely confusing to remember if I did or didn't do something, because I've done it hundreds or thousands of times before. This seems to fall between long- and short-term memory. I know where my contact case is in a strange hotel, even though I put it down somewhere 12+ hours before. I can find it in the dark the next morning. But a day later, there's no particular trace of these daily events. I probably couldn't even describe the hotel room with accuracy. Are these types of events creating long-term memories that are ruthlessly pruned because of no reinforcement, or are they stored differently? submitted by /u/warm_kitchenette [link] [comments]

Given that asteroids from Mars are found of Earth, would asteroids from Earth be found on Mars? Posted: 14 Jan 2017 04:10 AM PST And, if we find life on Mars, how would we show it wasn't just seeded there from Earth from one of these asteroids? I know that we have found chunks of Mars on Earth in the form of some very rare asteroids. The thought being that pieces of Mars could be thrown into space during large asteroid collisions. Could this happen in reverse?...maybe with some large impact like the Yucatán impact of 65-million years ago? submitted by /u/Sunfest [link] [comments]

Does chemistry matter when synthesizing superheavy elements? Posted: 13 Jan 2017 04:54 PM PST Because these new, artificially-produced elements require much energy to be produced and decay rapidly, I wonder whether the electrons are able to rearrange themselves into increasingly complicated configurations, and if so, whether it is possible to study the new element's chemical properties in any useful capacity. submitted by /u/iprobablydontknowyou [link] [comments]

Can someone give me an idea how big 6!!! is? I understand 6! = 720 and 6!! = 2.6012189435657951E+1746. What is 6!!!? Can it be written out or described in terms of atoms of the universe or moments since the Big Bang or something? Posted: 13 Jan 2017 08:30 PM PST FYI, question inspired by this post and this image: https://i.reddituploads.com/bfafab49e53e4210b88f952ad2f84c0c?fit=max&h=1536&w=1536&s=4d11ed58954238830755a085725f471f submitted by /u/justiname [link] [comments]

Does the momentum of light increase with intensity? Posted: 14 Jan 2017 12:24 AM PST If we think about a particle with mass and give it a velocity (v) it will have a momentum, expressed by the equation p = mv. If we have two of said particles moving at velocity v their total collective momentum will increase as the mass has increased. Light, however, does not have a mass as such but it has momentum. If the intensity of the light is increased such that there are many photons instead of one, will momentum increase? I can think of two possible answers however I'm not sure if either is correct. 1: We view the many photons as one system. As the number of photons increases mass does not increase (as photons have no mass) and neither does velocity (as c is constant), that means momentum will be the same as if there were one photon. 2: We must view each photon as an individual photon with individual momentum and never as 'combined photons' thus as the number of photons increase momentum will increase in a linearly. Thanks in advance for any answers. submitted by /u/matej_latte [link] [comments]

Why are bats the reservoir for so many zoonotic diseases? Posted: 13 Jan 2017 07:42 AM PST I've been reading David Quammen's Spillover, and it seems that for a lot of deadly zoonotic diseases - Hendra, Ebola, SARS, etc. - the natural reservoir is bats. This is kind of surprising to me, given that humans are not particularly closely related to bats, and we don't spend all that much time in close proximity to them (unlike, say, rats or pigeons). Is it just a coincidence that these three diseases all came from bats, or is there something about bats' immune system or lifecycle that makes them particularly apt to act as reservoirs of this kind of disease? submitted by /u/Doglatine [link] [comments]

How does an organism's body allow it to maintain the same amino acid composition in cells even when the diet of the organism is variable in different amino acid concentrations? Posted: 13 Jan 2017 07:43 PM PST submitted by /u/curdledturtle [link] [comments]

How does your organism measure the time? Posted: 13 Jan 2017 07:31 AM PST I've always wondered how your body (or any living organism) knows when it's time to start processes like puberty or end others, like growing. We all hit puberty in a really close range of years, but how does the body keep track of time to know it's the moment to do it? submitted by /u/skrotox [link] [comments]

Why do most chemical catalysts contain a second or third row transition metal, as opposed to a first row transition metal? Posted: 13 Jan 2017 12:32 PM PST As the title says, I am interested in understanding why elements such as palladium, iridium, ruthenium, etc are widely seen in chemical catalysts, but elements such as iron, copper, manganese, etc are not. I have seen a few chemical reactions involving titanium and nickel complexes used, but not nearly as frequently as second and third row transition metals. What about these elements make them more active? Why do we not see more first row transition metal based catalysts? submitted by /u/Mikey5296 [link] [comments]

What controls the height of cloud formations, why are some high up and some are low creating things like fog? Posted: 13 Jan 2017 06:52 AM PST submitted by /u/virus200 [link] [comments]

Why do soft drinks and beers foam up a lot when you pour them into a glass but not soda water? Posted: 13 Jan 2017 06:06 PM PST submitted by /u/delliejonut [link] [comments]

Why is a detached, insulated but non-heated garage warmer than outside during winter? Posted: 13 Jan 2017 09:27 AM PST My garage will be -5C when it is my -25C outside. submitted by /u/damancody [link] [comments]

What is it about brain death that precludes the possibility of a person from being awakened? Posted: 13 Jan 2017 05:14 PM PST I get that brain death takes place. But what is it, specifically, that precludes us from -- hypothetically, of course -- re-oxygenating the blood and reviving the brain? What takes place, on a biological/physical and medical level, that precludes the possibility of a person's consciousness from being revived? Thanks science guys! :D submitted by /u/e_d_a_m [link] [comments]

How do hashes work? Wouldn't there be one hash that could result in many, many input data possibilities? Posted: 13 Jan 2017 01:16 PM PST Let's say your input data is 1 million characters (alphabetic in nature) of data, and your resulting hash is a 16 digit string of hex values. Your input data would have 261000000 possible combinations of unique arrangements, correct? But your hash result would only have 1616 unique arrangements. So there would be many inputs that would result the same hash. Is it just such a low probability that when you change something that it would result in the same hash and therefore we can say it's secure enough (in the case of cryptography)? submitted by /u/arzthaus [link] [comments]

Since there is no perfect vacuum in space, is it possible to move in space using similar techniques like in air or in water? Posted: 13 Jan 2017 08:19 PM PST submitted by /u/Andrelse [link] [comments]

Regarding the obliquity of planets in the solar system, why are Venus and Uranus so different? Posted: 13 Jan 2017 11:06 AM PST submitted by /u/VolcanicTequila [link] [comments]

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How much radiation dose would you receive if you touched Chernobyl's Elephant's Foot?

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• How much radiation dose would you receive if you touched Chernobyl's Elephant's Foot?
• Why don't electrons traveling in the orbitals of atoms lose energy, although they are a mass traveling a narrow space which should require some kind of acceleration to stay close to the atom?
• Is there an objective definition for entropy?
• Can someone explain how magnetism generates electricity?
• What's our most sound theory of consciousness to date and why?
• If a planet in our solar system was impacted by a huge asteroid tomorrow, how long would it take for us to discover that, and would we be affected in any way on Earth?
• If friction is not taken into account, do helium balloons accelerate upwards at 9.8m/s/s?
• What happens when something is cooled to below 0 degrees Kelvin?
• Why does 16 Psyche have such a low density?
• How close could you get to the black hole at the centre of the Milky Way, Sagittarius A*, without being pulled in?
• What keeps the sun in place?
• Has a proton been observed being emitted in β^(-) decay?
• What is the smallest body in space that can have or support an atmosphere?
• [Linguistics] Are there any languages with different words for first person plural, differentiating whether second person is included?
• Does Mars have tectonic activity?
• If I had a compass in the middle of space, lightyears away from any matter, which way would the compass point?
• What man-made object holds the record for highest kinetic energy ever obtained?
• What is the consensus on the validity of the Katamatsu and Hirai 1999 "Monks Serotonin" Study?

How much radiation dose would you receive if you touched Chernobyl's Elephant's Foot? Posted: 12 Jan 2017 07:04 AM PST submitted by /u/Nuclearlover [link] [comments]

Why don't electrons traveling in the orbitals of atoms lose energy, although they are a mass traveling a narrow space which should require some kind of acceleration to stay close to the atom? Posted: 13 Jan 2017 04:29 AM PST As I learned in physics the acceleration of a mass (and the change of direction is an acceleration) results in a change of kinetic energy, so traveling in a narrow space like an electron around an atom requires acceleration to change the direction of the electron to stay around the atom, so then why are atoms stable at all and why don't electrons bounded to atoms lose energy all the time? submitted by /u/arachnofan [link] [comments]

Is there an objective definition for entropy? Posted: 12 Jan 2017 07:09 PM PST My understanding is that the second law of thermodynamics implies that the total entropy of the universe only increases over time, at least up to random decreases from statistical fluctuations. How does one define the total entropy of the universe in an objective way? The only definitions of entropy I'm aware of are all properties of a probability distribution rather than of a single state. In physics, this seems to necessitate a partition of the state of a system into a fixed known macrostate, and an associated probability distribution over microstates for which the entropy is defined. This seems like it would make the definition of entropy subjective, in that different observers might have different definitions as to the macrostate of a system, and have correspondingly (very slightly) different evaluations of its entropy. When measuring the entropy of the entire universe, I don't understand how one can objectively partition its state into a macrostate and a microstate, since presumably everything is just part of one total state and there's no way to pick out just one piece and call it the macrostate. So I guess I have two questions. Is there a truly objective way to define the entropy of a physical system? If not, is there a suitable related concept which is objective? What is actually meant by the "total entropy of the universe"? Or, if it's not strictly the "entropy" of the universe that always increases, what property is it? submitted by /u/phlogistic [link] [comments]

Can someone explain how magnetism generates electricity? Posted: 12 Jan 2017 08:57 PM PST And how they are related to magnetic field, electric field etc. Thanks reddit community! submitted by /u/pelurusesat [link] [comments]

What's our most sound theory of consciousness to date and why? Posted: 13 Jan 2017 01:21 AM PST Yes, for that one person out there, consciousness is what most would deem as metaphysical, but that doesn't stop neuroscienctists from slicing brains now does it? submitted by /u/AnonymousSteam [link] [comments]

If a planet in our solar system was impacted by a huge asteroid tomorrow, how long would it take for us to discover that, and would we be affected in any way on Earth? Posted: 12 Jan 2017 08:48 AM PST Like, for example, if Mars were struck by something rock-like moving at high speed that was say 1/20th the diameter of the planet itself. Obviously the landscape and the atmosphere of the planet would be altered, but what else would happen? Would its orbit get messed up, and would that have any influence on life here on Earth? How does this change if the impacted planet was Venus or Mercury? or if the object was 1/100th the diameter? 1/2? Also, could we go for a long time without knowing about this sort of thing happening in our solar system? Thanks! submitted by /u/groggyMPLS [link] [comments]

If friction is not taken into account, do helium balloons accelerate upwards at 9.8m/s/s? Posted: 13 Jan 2017 04:12 AM PST Bonus question! If there are two objects of identical shape, one weighs 10grams, the other has 10 grams of lift, are their terminal velocities the same? submitted by /u/empire314 [link] [comments]

What happens when something is cooled to below 0 degrees Kelvin? Posted: 12 Jan 2017 11:40 AM PST I saw this post in r/TIL: https://www.reddit.com/r/todayilearned/comments/5nl5cp/til_physicists_were_able_to_cool_atomic_gas_below/ I was wondering if anyone could elaborate on how this works, it was my understanding that things could not go below 0 degrees Kelvin. submitted by /u/PotaTOESnMoleASSES [link] [comments]

Why does 16 Psyche have such a low density? Posted: 12 Jan 2017 01:22 PM PST I read that asteroid 16 Psyche was composed mostly of pure iron and nickel. However, it only has a density of around 3.3 grams per cubic centimeter. How is this possible? If it's really pure iron/nickel shouldn't its density be WAY higher, like at least double? submitted by /u/DelfonicSonic [link] [comments]

How close could you get to the black hole at the centre of the Milky Way, Sagittarius A*, without being pulled in? Posted: 12 Jan 2017 10:46 AM PST submitted by /u/Scareynerd [link] [comments]

What keeps the sun in place? Posted: 12 Jan 2017 11:51 PM PST Gonna sound stupid but since there's no gravity in space then why doesn't the solar system float away? I know the sun's gravitational pull is what's keeping the planets in place but what's keeping the sun? submitted by /u/Gingeehd123 [link] [comments]

Has a proton been observed being emitted in β^(-) decay? Posted: 12 Jan 2017 11:33 PM PST I just learned of the continuous distribution among the 3 particles produced in beta decay. Normally in β- decay, a proton, electron, and antineutrino are produced, with the electron having a 1/250,000 chance of not having enough energy to escape the nucleus. Does this mean there is a non-zero chance of enough of the proton getting enough energy to escape, and has this ever been observed? submitted by /u/thebigredfiretruck [link] [comments]

What is the smallest body in space that can have or support an atmosphere? Posted: 12 Jan 2017 10:51 AM PST I'm curious to know just how small a planet or other celestial body can be in order to sustain an atmosphere. Mars for example is smaller than Earth and has an atmosphere. New Horizons has shown us that even Pluto, a dwarf planet, has a small atmosphere; and even Ceres is showing signs of a very faint water vapor atmosphere. Can anyone weigh in as to whether or not there are set rules on how small an object can be to have an atmosphere? submitted by /u/buffmb [link] [comments]

[Linguistics] Are there any languages with different words for first person plural, differentiating whether second person is included? Posted: 12 Jan 2017 08:43 AM PST Like one word "WE" (me, you, and possibly others), and another "We" (me and others, but not you)? submitted by /u/ironshadowspider [link] [comments]

Does Mars have tectonic activity? Posted: 12 Jan 2017 07:50 AM PST I was recently reading this article on the BBC (1) that stated Earth is the only planet we know of with techtonic activity. I felt skeptical and did some addictional reading that suggested plate tectonics indeed exist on Mars, but I'm unsure if they have been verified extensively. In addition the article also claims no other bodies with the exception of Jovian moons have volcanic activity. I know Io is volcanically active, so what causes this? Is it just tidal gravity? 1: http://www.bbc.com/earth/story/20170111-the-unexpected-ingredient-necessary-for-life 2: https://www.spaceanswers.com/solar-system/does-mars-have-tectonic-plates/ 3: http://www.iflscience.com/space/mars-may-have-continental-crust-similar-earths/ submitted by /u/Largedump [link] [comments]

If I had a compass in the middle of space, lightyears away from any matter, which way would the compass point? Posted: 12 Jan 2017 07:59 AM PST submitted by /u/ArYaFeelinEht [link] [comments]

What man-made object holds the record for highest kinetic energy ever obtained? Posted: 12 Jan 2017 07:13 AM PST I was thinking it must be something like the space station that moves very quickly and is relatively massive, or maybe the saturn V. I know that the question could get confusing based on the frame of reference for velocity. submitted by /u/Toke76 [link] [comments]

What is the consensus on the validity of the Katamatsu and Hirai 1999 "Monks Serotonin" Study? Posted: 12 Jan 2017 02:17 PM PST I understand that this is a non-standard question and fully understand if it is removed.   Moreso, is there proof that the study ever took place? The study is often cited in International Baccalaureate Psychology textbooks and learning resources, but all attempts by my teacher, classmates, and I to track down the study or either of the alleged authors have been fruitless. I feel that someone with experiance in this field may be able to shed more light on this subject than my peers or I have.   The information I have on the phantom study is as follows.   AIM Determine how the neurotransmitter serotonin can affect behavior METHOD Researchers studied a group of Buddhist monks which went on a 72-hour pilgrimage to a holy mountain in Japan Monks did not consume food or water, did not speak, and were exposed to the cold in the late autumn weather After about 48 hours, the monks began to experience hallucinations, often seeing ancient ancestors researchers took blood samples before the pilgrimage and immediately after the monks reported having hallucinations RESULTS Amount of serotonin had increased in the monk's brains CONCLUSION Sensory deprivation triggered the release of serotonin   Thank you for any assistiance you may be able to provide. submitted by /u/RyanAHixon [link] [comments]

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If 13% of the Netherlands was under the ocean in the last few hundred years, why is the land so fertile?

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• If 13% of the Netherlands was under the ocean in the last few hundred years, why is the land so fertile?
• How do we know pi is infinite?
• I know this is an topic, but how credible is this article on the effects of violent video games?
• How does space affect heat-seeking munitions/weapons?
• By what mechanism does salt lower the boiling point of water?
• Does hot water flow faster than cold water?
• Is it known why histone variants are added to different parts of the genome?
• How do animals with eyes on either side of their head see?
• Is it possible for two planets to be in the same orbit path?
• Has hunting male deer with the most points had an effects on deer population due to artificial selection via hunting?
• Does NASA have a manned mission to Mars planned if anything breaks on the Rover? If so, could anyone tell us details?
• How do predators know which prey to hunt?
• Can high and low pressure systems become small enough that multiple systems hit an area in a single day?
• Would it be possible to make a magnet in the form of a hollow sphere where the north is the outside and the south is the inside?
• Has food whether it is in a solid or liquid state an impact on the nutrional value?
• If volcanoes created Hawaii, how did seeds (ect..) get there to form the life there before humans?
• How much does sound perception differ from person to person?
• How can we predict if a material is transparent, reflective or absorbs light based on its chemical structure?
• Why does a granular solid expand under pressure? Where is the energy coming from?
• How does an antenna on a radio telescope know the polarization of reflected waves from the parabolic surface?
• Does friction force increase with velocity?

If 13% of the Netherlands was under the ocean in the last few hundred years, why is the land so fertile? Posted: 11 Jan 2017 05:49 PM PST Shouldn't the land be really salty, instead of being incredibly arable? submitted by /u/Sarah2376 [link] [comments]

How do we know pi is infinite? Posted: 11 Jan 2017 04:55 PM PST I know that we have more digits of pi than would ever be needed (billions or trillions times as much), but how do we know that pi is infinite, rather than an insane amount of digits long? submitted by /u/noah9942 [link] [comments]

I know this is an topic, but how credible is this article on the effects of violent video games? Posted: 12 Jan 2017 06:03 AM PST Title was mean to say "I know this is an old topic" my bad. Article in question: http://www.apa.org/science/about/psa/2003/10/anderson.aspx The statements that Dr. Craig Anderson make seem a little odd. This for example: Myth 6. There are no studies linking violent video game play to serious aggression. Facts: High levels of violent video game exposure have been linked to delinquency, fighting at school and during free play periods, and violent criminal behavior (e.g., self-reported assault, robbery). He doesn't really say if it's a huge reason why those acts happen or if its just a factor. Also it seems odd since last I checked there wasn't any epidemic of robberies and assault done in the name of video games. Or is it the same old, oh this person played violent video games and robbed someone/attacked someone, clearly the video games were on of the main reasons! I don't see my friends going around robbing people or attacking them. Sure some people do it, but isn't because its violent video games on top of being already mentally aggressive and having a troubled youth? Also the whole delinquency angle sounds strange to me, is there any merit to that claim outside of his own study? Another statement he makes that I find odd: Myth 11. If violent video games cause increases in aggression, violent crime rates in the U.S. would be increasing instead of decreasing. Facts: Three assumptions must all be true for this myth to be valid: (a) exposure to violent media (including video games) is increasing; (b) youth violent crime rates are decreasing; (c) video game violence is the only (or the primary) factor contributing to societal violence. The first assumption is probably true. The second is not true, as reported by the 2001 Report of the Surgeon General on Youth Violence (Figure 2-7, p. 25). The third is clearly untrue. Media violence is only one of many factors that contribute to societal violence and is certainly not the most important one. Media violence researchers have repeatedly noted this. Pay attention to this "Media violence is only one of many factors that contribute to societal violence and is certainly not the most important one. Media violence researchers have repeatedly noted this." He stated that video games have been linked to robbery and assault, but says it is only a small factor now. It sounds like he was trying to make video games sound WAY worse than they really are. Also what annoys me about this whole article, is that it doesn't touch on the subject of do video games directly make people violent. As in if I don't have other risk factors or I have very few, could video games alone make me into a violent person? Anyways thanks to whoever has read this, if you are a professional on this type of stuff I would really appreciate an answer/perspective. Thanks in advance! submitted by /u/Dkv54 [link] [comments]

How does space affect heat-seeking munitions/weapons? Posted: 11 Jan 2017 10:48 PM PST Really three questions. Hey folks. I'm a SciFi Writer. I have a few questions, to inform a short story I'm working on. Thank you in advance. Anyhow, on to my questions. 1) I can remember reading or hearing that heat travels through space via radiation. How would this affect heat seeking missiles (suppose a craft is targeting another craft)? 2) Since, according to Wikipedia, heat is a form of electromagnetic radiation, how would electromagnetic pulses affect this? Assuming the characters did some faraday cage stuff, could an EMP be used as a countermeasure (even if they can't directly disable the munition)? 3) In lieu of using heat to track, would it be viable to have weapons that track via light (ie the light of engines)? I've written it in so far like this (assuming heat is a no go), and the Humans use fast-moving reflective flachette to reflect light from their engines and the sun to fool such devices. submitted by /u/KingValdyrI [link] [comments]

By what mechanism does salt lower the boiling point of water? Posted: 11 Jan 2017 06:37 PM PST submitted by /u/not_quite_cool_guy [link] [comments]

Does hot water flow faster than cold water? Posted: 11 Jan 2017 07:38 PM PST Just went through my head as particles move faster with heat, does it affect the flow. submitted by /u/Mighty_Burrito [link] [comments]

Is it known why histone variants are added to different parts of the genome? Posted: 12 Jan 2017 06:23 AM PST I keep seeing that they are added, but not why. For example H2AZ is incorporated into regions of high activity, but why? Does it have a function? submitted by /u/ActivisionBlizzard [link] [comments]

How do animals with eyes on either side of their head see? Posted: 11 Jan 2017 03:42 PM PST Do they have the ability to alternate which eye they use at a certain time? Or instead, is the image that their brain receives a combination of visual input of both eyes? submitted by /u/Moonical [link] [comments]

Is it possible for two planets to be in the same orbit path? Posted: 11 Jan 2017 04:28 PM PST submitted by /u/dedobe [link] [comments]

Has hunting male deer with the most points had an effects on deer population due to artificial selection via hunting? Posted: 11 Jan 2017 06:19 PM PST E.g. The deer with the less amount of points on its antlers gets to live longer to pass on it's genes regarding lower point count regarding antlers. submitted by /u/Dustin432321 [link] [comments]

Does NASA have a manned mission to Mars planned if anything breaks on the Rover? If so, could anyone tell us details? Posted: 12 Jan 2017 07:01 AM PST Details such as a time frame of the mission, amount of people, etc? submitted by /u/ozymandiasrizzo [link] [comments]

How do predators know which prey to hunt? Posted: 12 Jan 2017 06:24 AM PST e.g. many birds of prey like to eat mice; and I understand that the size of mice fits well for this example, but how do they know that mice will taste good and contain the necessary nutrients? submitted by /u/avance70 [link] [comments]

Can high and low pressure systems become small enough that multiple systems hit an area in a single day? Posted: 12 Jan 2017 05:23 AM PST submitted by /u/InterracialMartian [link] [comments]

Would it be possible to make a magnet in the form of a hollow sphere where the north is the outside and the south is the inside? Posted: 12 Jan 2017 01:36 AM PST I Assume it would require a tiny hole somewhere to be able to put something inside it to create the polarization of the magnet? submitted by /u/Angriestmanever [link] [comments]

Has food whether it is in a solid or liquid state an impact on the nutrional value? Posted: 12 Jan 2017 04:12 AM PST I have searched for a scientific article about this and I found this. In the article can be seen the food intake for the next meal was higher with those who had a meal in a liquid state. But can someone clarify whether the body can extract less value out of a liquid meal or because there is a difference in the hormon balance between the two type of meals, or because the digestion took less time. submitted by /u/kennethdc [link] [comments]

If volcanoes created Hawaii, how did seeds (ect..) get there to form the life there before humans? Posted: 12 Jan 2017 02:59 AM PST I understand how soil would form, but how would anything grow? If there are no seeds there, how would trees, grass, or any plant for that matter grow? submitted by /u/gravytrain312 [link] [comments]

How much does sound perception differ from person to person? Posted: 11 Jan 2017 04:01 PM PST As a producer I deal with balancing frequencies, and I was wondering if everyone has their own internal "frequency response" that changes the way they perceive audio, and if so, how much variance is there? submitted by /u/Kalzedar [link] [comments]

How can we predict if a material is transparent, reflective or absorbs light based on its chemical structure? Posted: 12 Jan 2017 02:32 AM PST Asked by my 10 year old son upon learning about the periodic table of elements: does the table help us know if a material is bright or dark? I found great resources online explaining light in simple terms, such as http://www.madsci.org/posts/archives/1999-08/934381368.Ph.r.html But this fails to account how incident light strikes atoms in the material to excite the electrons, and makes the photons bounce back (reflection, bright material), keep the electron excited (absorption, black), or let the photon pass-through (transparent). Any way to explain this simply? submitted by /u/thbb [link] [comments]

Why does a granular solid expand under pressure? Where is the energy coming from? Posted: 12 Jan 2017 02:06 AM PST When pressure is exerted on a granular solid inside a tall cylindrical container, the distance between all the grains expands. So when you add more sand into the container, the sand at the very top should move upwards due to the expansion of the sand below it. Where is this kinetic energy coming from? References from where I discovered granular expansion: http://tid.uio.no/~dansh/pdf/author/jaeger-RMP.pdf http://www.cpt.univ-mrs.fr/~barrat/Molphys.pdf http://www.math.upatras.gr/~phdsch11/wp-content/uploads/2011/05/Paper-1.pdf submitted by /u/pieyum1 [link] [comments]

How does an antenna on a radio telescope know the polarization of reflected waves from the parabolic surface? Posted: 11 Jan 2017 07:12 PM PST For example, if the waves from an astrophysical source are all polarized, wouldn't this polarization change directions when the wave is reflected off of the parabolic surface and thus not register with the antenna if the antenna only responds to an electromagnetic field polarized in a particular axis? submitted by /u/CallMeDoc24 [link] [comments]

Does friction force increase with velocity? Posted: 11 Jan 2017 12:54 PM PST I know we usually express friction as F_f = N*mu, which is a simple model that holds for many cases. My question is does friction force actually depend on velocity? Does a wheel rotating about an axis really experience the same friction whether it's going at 1 rpm or 1000 rpm? submitted by /u/PrandtlMan [link] [comments]

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