Why is it not E=1/2m c^2, like KE=1/2m v^2 ? Did Einstein leave off the 1/2?

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• Why is it not E=1/2m c^2, like KE=1/2m v^2 ? Did Einstein leave off the 1/2?
• What is the time uncertainty in the energy time uncertainty principle? How can we derive this from position and momentum uncertainty? How to calculate it since we do not have an operator for time?
• If an electron in an atom emits a photon but no lower energy orbital is available for it to drop to, does the electron leave the atom?
• Why are there no magnetic monopoles in existence but “monopolar” electric charges (protons electrons) exist?
• What is a water surface like at a molecular level?
• What is the medium between synapses? And what force if there is any, pushing neurotransmitters into receptors?
• What will happen to Earth when the Milky Way collides with the Andromeda galaxy?
• How come NASA's Opportunity rover lasted as long as it did?
• How exactly does a shock wave from an explosion kills you (assuming that you don't die due to heat and objects flying around)?
• How is actual temperature and “feels like” temperature determined on a weather app?
• What do the final days before Launch involve for Astronauts?
• If a reactor used weapons-grade material (plutonium, uranium, etc.), would an ensuing meltdown look like a nuclear bomb?
• What made the Chernobyl NPP design so flawed - and were there other nuclear power plants with similar design in the Soviet Union? Are there any in the world now?
• Why does PH affect bacteria life so differently in the gut versus the mouth?
• Why do people store their pH probes in distilled water?
• Does reading / close viewing actually affect or harm vision?
• How do single celled creatures heal their wounds if at all?
• Why does the spin imparted on a bullet by rifling continue once it has left the barrel?
• The North American Great Lakes are connected to the Northern Atlantic Ocean through the St Lawrence River, so why isn't the salinity level of the lakes higher?
• What happens when lightning strikes the ocean? Will the fish in the area be affected in any way?
• Can exposure to radiation ignite a flammable gas?
• Does NASA know exactly what went wrong with Opportunity? Why exactly she gave out?
• Why does the far side of the moon have less crater marks than the side facing earth? Wouldn’t earth’s gravity prevent that?

Why is it not E=1/2m c^2, like KE=1/2m v^2 ? Did Einstein leave off the 1/2? Posted: 13 Feb 2019 07:58 PM PST submitted by /u/dmaswhite4 [link] [comments]

What is the time uncertainty in the energy time uncertainty principle? How can we derive this from position and momentum uncertainty? How to calculate it since we do not have an operator for time? Posted: 14 Feb 2019 05:01 AM PST submitted by /u/lousylad10 [link] [comments]

If an electron in an atom emits a photon but no lower energy orbital is available for it to drop to, does the electron leave the atom? Posted: 14 Feb 2019 08:06 AM PST I understand that if an electron absorbs a photon it can be excited to a higher orbital and the only way to drop back down is to emit a photon. My question asks if an electron is already at its lowest possible orbital and emits a photon, does the electron simply get knocked from the atom? ​ Also would an electron that is in a higher orbital emit a photon naturally without any outside excitation in order to drop down and fill the lower orbitals? Or can photons only be emitted by outside excitation? submitted by /u/ryandeanrocks [link] [comments]

Why are there no magnetic monopoles in existence but “monopolar” electric charges (protons electrons) exist? Posted: 13 Feb 2019 08:48 PM PST submitted by /u/cr_7405 [link] [comments]

What is a water surface like at a molecular level? Posted: 13 Feb 2019 10:02 PM PST Suppose that you have a glass container which is half-full of pure water at room temperature, sitting on a table, and there are no external sources of vibration (aside from thermal motion) from the table or surrounding air. Suppose that you could zoom in on the surface of the water almost to a molecular level and make measurements to judge the appearance of the water surface. I would like to understand as much as possible what this would be like and if and how it might be different from how we think of a water surface at larger scales. Would there be a sharply-defined water surface (at a molecular level) or a more-or-less gradual transition from liquid to gas? Would there be waves in the water and how big would they be? What role would surface tension play in the size of waves and the escape of water molecules into the gas phase? Would the appearance of the surface be dominated by the passage of molecules to and from the gas phase, or would these events not have such a great surface density? Thanks in advance for any help in clarifying this. submitted by /u/clearing [link] [comments]

What is the medium between synapses? And what force if there is any, pushing neurotransmitters into receptors? Posted: 14 Feb 2019 06:41 AM PST submitted by /u/LilxDDDD [link] [comments]

What will happen to Earth when the Milky Way collides with the Andromeda galaxy? Posted: 14 Feb 2019 03:52 AM PST So in 4 billion years the Milky Way is going to collide with the Andromeda Galexy, but if for some reason that were to happen in our lifetime, how might it affect our planet/ solar system? submitted by /u/fenster112 [link] [comments]

How come NASA's Opportunity rover lasted as long as it did? Posted: 14 Feb 2019 04:23 AM PST How come it went from an expected duration of 90 days to staying alive for 14 years? What did they expect would 'kill' the rover so soon? Why didn't this happen? In 14 years, what more has the rover accomplished other than it's initial goals for those 90 days? submitted by /u/Sietseee [link] [comments]

How exactly does a shock wave from an explosion kills you (assuming that you don't die due to heat and objects flying around)? Posted: 13 Feb 2019 03:50 PM PST submitted by /u/bullschitero [link] [comments]

How is actual temperature and “feels like” temperature determined on a weather app? Posted: 13 Feb 2019 11:32 PM PST On my weather app it says "feels like 56 degrees" but the actual temperature is 58 degrees. Is a formula used? submitted by /u/PROMODZoCOM [link] [comments]

What do the final days before Launch involve for Astronauts? Posted: 14 Feb 2019 03:17 AM PST I've always maintained a semi-constant fascination for space-exploration. I always say I was born at the wrong time. As an average guy of average intelligence and average health, I can't explore space today. You need to be so exceptional in so many ways. Where's my personal space ship that can zip me across the galaxy at 45,000c??? But one can always dream. ​ I did read one of Chris Hadfield's books, and I learned a lot about astronaut training, the different considerations physiologically, mechanically etc. as well as the stuff that happens during launch and once you're up there. One thing I never really got a sense of though, is what happens during those final 24-48h? What preparations do the astronauts go through? Vaccinations, final check-ups, routines, etc. ​ Essentially, I'm asking, what and why is done to/by astronauts up to the point where they're strapped in? I'm still looking online but I'm not really sure where to begin. I'm on ESA's and NASA's websites at the moment. Youtube has been surprisingly disappointing. submitted by /u/MerryfaceAviation [link] [comments]

If a reactor used weapons-grade material (plutonium, uranium, etc.), would an ensuing meltdown look like a nuclear bomb? Posted: 14 Feb 2019 08:25 AM PST Also, what do you tag for nuclear stuff like this? submitted by /u/superservo27 [link] [comments]

What made the Chernobyl NPP design so flawed - and were there other nuclear power plants with similar design in the Soviet Union? Are there any in the world now? Posted: 14 Feb 2019 08:15 AM PST I was wondering if there are any other power plants built in a similar flawed fashion or at the very least if there used to be many of them and what happened since the disaster. Couldn't find the answer from a quick google. submitted by /u/SvarogsSon [link] [comments]

Why does PH affect bacteria life so differently in the gut versus the mouth? Posted: 14 Feb 2019 08:08 AM PST Google "gut health, PH and bacteria" and the articles tell you that: " Healthy gut microbes tolerate an ecosystem with a low pH (acid) while harmful bacteria do not" Google "oral health, PH and bacteria" and with some reading you will find that many articles will say something like: " An acidic environment allows bad bacteria to thrive and contributes to plaque accumulation,demineralization of the teeth, bad breath, gingivitis, and periodontal disease; while a more alkaline environment favors good bacteria and is essential for optima articles tell you that the bad bacteria can't survive in an alkaline environment." So which is it? Why do bad gut bacteria like alkalinity and good gut bacteria like acidity, while bad mouth bacteria like acidity and good mouth bacteria like akalinity? ​ submitted by /u/k2900 [link] [comments]

Why do people store their pH probes in distilled water? Posted: 14 Feb 2019 08:02 AM PST I have read that distilled water will strip the ions from the probe essentially causing them to be less effective over time yet every place I've ever worked has always kept the pH probes in distilled water when not in use. Wouldn't it be better to store it in a solution with more ions rather than less? submitted by /u/Ohjay1982 [link] [comments]

Does reading / close viewing actually affect or harm vision? Posted: 14 Feb 2019 08:02 AM PST I was listening to a podcast about a doctor who treated myopia and he asserted that focusing on objects close to the face put strain on the eye and could damage the muscles that adjust the lens because from an evolutionary perspective our hunter/gatherer ancestors would be adapted for primarily long-distance vision to see prey or look for danger, and short-range vision would only be used intermittently rather than for hours at a time reading books or some such. it was also asserted that glasses prevented natural focusing of the eye and would, over time, make the eye weaker and inevitably lead to stronger prescriptions due to further atrophy of the eye muscles. This all seems to make sense to me but I'm not a doctor. Is this largely nonsense or is there any real scientific support for this? submitted by /u/stupidrobots [link] [comments]

How do single celled creatures heal their wounds if at all? Posted: 14 Feb 2019 07:58 AM PST Multicelled creatures pretty much just replace the dead/damaged cells with new cells but what do the individual cells do to repair damage to their individual cell walls? Is it active or passive meaning do the molecules just link back together because of their physical qualities (polarity between water molecules and such) or do cells/Eukaryotes/prokaryotes/Archaebacteria have ways of actively repairing themselves? submitted by /u/JohnWoke [link] [comments]

Why does the spin imparted on a bullet by rifling continue once it has left the barrel? Posted: 14 Feb 2019 07:55 AM PST Why doesnt it just remain at its last point of rotation when it exited? submitted by /u/eggsngravy [link] [comments]

The North American Great Lakes are connected to the Northern Atlantic Ocean through the St Lawrence River, so why isn't the salinity level of the lakes higher? Posted: 14 Feb 2019 06:58 AM PST Are there salinity differences between say, Lake Ontario and Lake Superior? What processes effect the boundary between fresh and salt water? submitted by /u/Olleck [link] [comments]

What happens when lightning strikes the ocean? Will the fish in the area be affected in any way? Posted: 14 Feb 2019 03:08 AM PST submitted by /u/bunman89 [link] [comments]

Can exposure to radiation ignite a flammable gas? Posted: 14 Feb 2019 06:21 AM PST submitted by /u/PumSqu [link] [comments]

Does NASA know exactly what went wrong with Opportunity? Why exactly she gave out? Posted: 13 Feb 2019 06:46 PM PST submitted by /u/Pterodactylandi [link] [comments]

Why does the far side of the moon have less crater marks than the side facing earth? Wouldn’t earth’s gravity prevent that? Posted: 13 Feb 2019 04:18 PM PST submitted by /u/Phosamedo [link] [comments]

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Are deep water currents affected by the coriolis effect?

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• Are deep water currents affected by the coriolis effect?
• Does a magnet ever lose its power?
• How does a buried seed know where "up" is?
• Why does the onset of schizophrenia occur later in women than men?
• Do we have a way to measure size other than relative to other objects? In other words, if everything in the universe was growing at the same rate, down to the subatomic level, would we know?
• Is saving fuel the only reason we use Hohmann transfers (for instance to go to Mars)?
• Does the atomspheric pressure increase when more co2 is produced?
• There are many dedicated hardware to solve cyptographic hashing functions because of crypocurrency mining. Does this weaken the security of the used functions in other applications?
• Do gases heat up when they contract? If so, theoretically, in a vacuum, would repeated equal contractions and expansions result in a net heat loss or not?
• Since red blood cells contain no nucleus how is dna obtained from blood?
• Ask Anything Wednesday - Engineering, Mathematics, Computer Science
• How long would someone need to spend in another country, before it would be detectable to isotope analysis?
• How does this chemical equilibrium expression work?
• What came first, fermions or bosons?
• Does sunlight lose energy as it travels?
• Can the same vaccine be used on any species?
• Why do American favorite colors include red less often than the rest of the world?
• Is is possible for fox fur to change color with age?
• I read a TIL about a woman who can smell Parkinson's and animals that can sniff out cancer. Has there ever been any significant push to investigate the human "odorome" wrt health and disease? If not, how would we go about it?
• Okay, so how on earth did New Zealand form?
• How does vegetation get to desert oases?
• What is the Derivation of the Autoignition Equation?
• How are soil maps of a large area like the United States able to be so clearly defined?

Are deep water currents affected by the coriolis effect? Posted: 12 Feb 2019 03:38 PM PST Hello. I was wondering if deep water currents are affected by the coriolis effect. I have read about Ekman transport and how the coriolis effect plays a role in surface currents, but I was wondering if a similar process could occur in deep water currents? When I look at a map of the ocean currents, all I see for deep water currents is a relatively straight path from the Northern hemisphere to the Southern hemisphere, and then around Antarctica and up into the Pacific. I know they are density-driven, but shouldn't they deflect a little due to the coriolis effect as they move? Thanks! submitted by /u/EmpireOfBarbettia [link] [comments]

Does a magnet ever lose its power? Posted: 13 Feb 2019 03:48 AM PST submitted by /u/PM_NUDES_AND_FEET [link] [comments]

How does a buried seed know where "up" is? Posted: 12 Feb 2019 10:09 PM PST submitted by /u/MotionField [link] [comments]

Why does the onset of schizophrenia occur later in women than men? Posted: 12 Feb 2019 10:08 AM PST According to these studies: Sex Differences in the Adolescent Brain; Women and Schizophrenia , the female brain finishes maturing on average four years earlier than males (21 in women and 25 in men). However, the onset of schizophrenia occurs later in women (late 20s+ in women and 18-24 in men). The first study referenced mentions a hypothesis that the pubertal surge in estrogen women experience may delay the symptoms, but the researchers seemed hesitant to attribute that as a definite cause. I have not been able to find an answer as to why schizophrenia typically begins later in women, especially since the observed development patterns between the sexes would intuit the opposite. Does anyone know the answer to this? submitted by /u/writetolive2 [link] [comments]

Do we have a way to measure size other than relative to other objects? In other words, if everything in the universe was growing at the same rate, down to the subatomic level, would we know? Posted: 13 Feb 2019 01:55 AM PST submitted by /u/trclocke [link] [comments]

Is saving fuel the only reason we use Hohmann transfers (for instance to go to Mars)? Posted: 13 Feb 2019 06:16 AM PST I realize that Hohmann transfers are the most efficient way of transferring between two elliptical orbits in the same plane, but are there other reasons why we choose that particular way? It seems that the need to wait for proper launch windows could become a problem sometime down the line. Could there be other reasonable trajectories, for instance, the craft decelerating and slingshotting around the Sun and then accelerating into a farther orbit? What would be the downsides of such flight-paths? Edit: Was corrected; Hohmann transfers aren't the most efficient but are amongst the most favourable. submitted by /u/Gabercek [link] [comments]

Does the atomspheric pressure increase when more co2 is produced? Posted: 12 Feb 2019 03:29 PM PST submitted by /u/biscuwit [link] [comments]

There are many dedicated hardware to solve cyptographic hashing functions because of crypocurrency mining. Does this weaken the security of the used functions in other applications? Posted: 13 Feb 2019 07:02 AM PST There are many ASICs, FPGAs, GPUs available to brute force SHA256 (for mining Bitcoins). This means that cracking SHA256 is cheaper than other algorithms. submitted by /u/Da_Drueben [link] [comments]

Do gases heat up when they contract? If so, theoretically, in a vacuum, would repeated equal contractions and expansions result in a net heat loss or not? Posted: 13 Feb 2019 07:48 AM PST submitted by /u/feesih0ps [link] [comments]

Since red blood cells contain no nucleus how is dna obtained from blood? Posted: 12 Feb 2019 01:45 PM PST submitted by /u/Olidude44 [link] [comments]

Ask Anything Wednesday - Engineering, Mathematics, Computer Science Posted: 13 Feb 2019 07:12 AM PST Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Engineering, Mathematics, Computer Science Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! submitted by /u/AutoModerator [link] [comments]

How long would someone need to spend in another country, before it would be detectable to isotope analysis? Posted: 13 Feb 2019 12:25 AM PST So, I was reading Sue Black(formerly Professor of Forensic Anthropology at University of Dundee, Scotland)'s book "All That Remains" the other day and there was a passage that caught my attention. It was talking about the use of isotope analysis on people's hair to determine whether someone had spent time in another country (the specific example used was "a terrorist suspect claiming to have never left the UK" having spent time in Afghanistan), and it had me wondering about just how much time you'd need to spend in another country (or another part of your own, for that matter) to affect such an analysis? submitted by /u/PhasersToShakeNBake [link] [comments]

How does this chemical equilibrium expression work? Posted: 12 Feb 2019 11:05 PM PST I came across an equation that looked something like this: HgO(s) = Hg(l) + O2(g). Now the equilibrium expression should be K = [O2], since HgO and Hg are solid and liquid respectively, so they shouldn't be considered in the equilibrium expression. According to this expression, reducing the concentration/pressure of O2 should reduce K, and in turn, shift the equilibrium to the reactants. However, according to Le Chatelier's Principle, reducing the pressure would shift the equilibrium to the right, as there are more moles of gas there. ​ How do Le Chatelier's Principle and the equilibrium expression relate/affect one another, and are they always accurate? submitted by /u/Protolate [link] [comments]

What came first, fermions or bosons? Posted: 13 Feb 2019 01:42 AM PST submitted by /u/pimpmastahanhduece [link] [comments]

Does sunlight lose energy as it travels? Posted: 12 Feb 2019 08:50 PM PST Why does the sun heat heat a planet like mercury more than a planet like Neptune? If space is a vacuum, where does the energy go that is lost between the sun and a planet? submitted by /u/Shard5 [link] [comments]

Can the same vaccine be used on any species? Posted: 12 Feb 2019 08:09 PM PST Assuming that, for example, a cat and a human could be infected with the same illness, could an identical vaccine be used grant immunity to both species? What factors would cause a vaccine to be ineffective between species? submitted by /u/Majumafoo [link] [comments]

Why do American favorite colors include red less often than the rest of the world? Posted: 13 Feb 2019 07:11 AM PST Some Google searches tell me that average American favorite colors are blue, purple, green, THEN red, while the rest of the world's average favorite colors are blue, then red, then whatever else. So, what makes red less appealing to us? I don't know if other countries associate it with anger and intensity like we do. I also considered the Red Scare, but that's getting far enough back that it shouldn't affect the younger generations so much. So why? submitted by /u/HowDoISea [link] [comments]

Is is possible for fox fur to change color with age? Posted: 13 Feb 2019 07:09 AM PST I'm asking this because I'm a Zootopia fan and I noticed that there was one fox character who was shown as an eight-year-old to have a white-tipped tail, but when we later see that character in his twenties, he has a brown-tipped tail. A goof? Probably. But I'm curious if that sort of thing happens in real life. submitted by /u/Dancou-Maryuu [link] [comments]

I read a TIL about a woman who can smell Parkinson's and animals that can sniff out cancer. Has there ever been any significant push to investigate the human "odorome" wrt health and disease? If not, how would we go about it? Posted: 13 Feb 2019 07:06 AM PST Speculating here, but it seems like monitoring the changes in the odorome might be a cheap and useful diagnostic tool. The TIL in the title. submitted by /u/ghostoftheuniverse [link] [comments]

Okay, so how on earth did New Zealand form? Posted: 12 Feb 2019 04:00 PM PST I'm looking at the information available to me, and New Zealand forming, as I understand it, involves it breaking off of Australia and sinking into the ocean. This confounds me for several reasons. ​ 1: I see no rift valley. It's my understanding that when continents break apart, you get a rift valley, which forms into an ocean. Now, I see no oceanic ridge between New Zealand and Australia that may have formerly been a rift valley. ​ 2: How is New Zealand not on its own plate? It's made of continental crust, and separate from New Zealand through a process I can only assume involved rifting. Wouldn't this result in it being on its own plate? Instead, this mass of continental crust is somehow over a convergent boundary where two bits of oceanic crust meat. How does this work? This doesn't make sense to me. ​ 3: It's on a convergent boundary, but the sunken continent isn't outlined by subduction zones? If two bits of oceanic crust are ramming together around New Zeland, which is made of continental crust, why isn't the crust subducting under all of Newzealand? ​ Now, I'm assuming I'm missing some major information here, or there are some mechanics here that I just don't understand or know about, because this whole situation pokes so many holes in my understanding of plate tectonics and how continental crust moves, that it boggles me and makes me question if I know anything at all. Someone, please explain this mess to me. submitted by /u/jaxlov [link] [comments]

How does vegetation get to desert oases? Posted: 13 Feb 2019 06:23 AM PST https://www.reddit.com/r/pics/comments/aq289z/this_is_what_an_oasis_in_libya_looks_like/ Saw this in r/pics. The desert must be millennia in age, has the vegetation just reproduced and survived from before the desert was there? Or is there a different way vegetation that lush is there? Some commentors say the water must be salty, so I'm just lost how all this can be there. submitted by /u/cornhole99 [link] [comments]

What is the Derivation of the Autoignition Equation? Posted: 13 Feb 2019 02:31 AM PST The time for a material to reach its autoignition temperature is defined as : tig= (pi/4)*kpc[(Tig-T0)/q"]^2 where k = thermal conductivity, ρ = density, and c = specific heat capacity of the material of interest, T0 is the initial temperature of the material (or the temperature of the bulk material). The heat flux is q", the autoigntion temperature is Tig, and the time it takes to reach that is tig. I tried to search the derivation of this equation online but could not find any. What is the derivation of the autoignition temperature? And is there even a derivation for this? submitted by /u/lyadalachanc [link] [comments]

How are soil maps of a large area like the United States able to be so clearly defined? Posted: 13 Feb 2019 05:47 AM PST submitted by /u/Rebel_Scum83 [link] [comments]

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How rapidly (or not) does a newborn star "ignite" once it reaches critical mass? Hours, days, years?

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• How rapidly (or not) does a newborn star "ignite" once it reaches critical mass? Hours, days, years?
• Are glaciers moving non-stop or is the movement staggered?
• Is there anything analogous to relativistic velocity for angular velocity i.e. is there something as relativistic angular velocity?
• Why do planets' rotational axes tilt?
• At present, what can quantum computers do that classical computers can't?
• Has the proportion of sedimentary and metamorphic rock increased as Earth has aged?
• Is the size of an anechoic chamber important? How tiny could you make it until it would stop working?
• Was the 2014-2016 outbreak of Ebola the first Human Ebola case in the US?
• What is a multi-chromosomal hub?
• Would it be possible to put a definitive end point on certain infinite numbers like pi if we used a mathematics system that wasn't base 10?
• When did life evolve sleep?
• On sky Rotation of the moon is linear?
• what does silver nitrate do to open wounds? why is it used?
• How does a baby/cells know to create a baby shape?
• Are black holes hot or cold?
• How do we define the nature of quantity"Q"that is to be always conserved in the conservation of energy?
• How long does it take soap to “remove” bacteria?
• How do doctors weigh a fetus in the womb?
• Why does heroin constrict one's pupils?
• Why do some people attract bug bites (mosquitos, black flies) a lot more than others?
• Why is dimethylMercury highly toxic, while ethylMercury is safe?
• Why is terminal dehydration known to cause mild euphoria?
• How do opticians know what prescription glasses to give babies/toddlers?

How rapidly (or not) does a newborn star "ignite" once it reaches critical mass? Hours, days, years? Posted: 11 Feb 2019 06:17 PM PST submitted by /u/Schady_Freude [link] [comments]

Are glaciers moving non-stop or is the movement staggered? Posted: 12 Feb 2019 07:39 AM PST Are they constantly on the move like a monolithic snail or do they move abruptly in response to their weight/environmental changes? Or neither, or both? submitted by /u/Sun-lun [link] [comments]

Is there anything analogous to relativistic velocity for angular velocity i.e. is there something as relativistic angular velocity? Posted: 12 Feb 2019 04:45 AM PST I have just learned about the Theory of Special Relativity and understood the constancy of speed of light and how that translates into the theory. I was wondering that if there was an upper limit like speed of light to the angular velocity of an object? I know that angular velocity and linear velocity are two different things but my question is that what would happen if the numerical value of angular velocity were to be equal to the speed of light maybe like 'c' rad/s(if possible at all). Is there a concept of relativity in case of rotating bodies or how is the theory of special relativity translated in rotational mechanics? submitted by /u/ClarkDale123 [link] [comments]

Why do planets' rotational axes tilt? Posted: 12 Feb 2019 08:01 AM PST Why are planets not oriented perpendicular to the point they are orbiting around? submitted by /u/rootstein [link] [comments]

At present, what can quantum computers do that classical computers can't? Posted: 11 Feb 2019 11:32 PM PST This question was asked 9 months ago in https://www.reddit.com/r/askscience/comments/8c8es7/at_present_what_can_quantum_computers_do_that/ ​ Have there been any new developments since then? submitted by /u/LlewellynS96 [link] [comments]

Has the proportion of sedimentary and metamorphic rock increased as Earth has aged? Posted: 12 Feb 2019 03:00 AM PST submitted by /u/Vanvidum [link] [comments]

Is the size of an anechoic chamber important? How tiny could you make it until it would stop working? Posted: 12 Feb 2019 04:52 AM PST I would like to build one myself, maybe even one with the size of a shipping box. would that still work? submitted by /u/floriancarl [link] [comments]

Was the 2014-2016 outbreak of Ebola the first Human Ebola case in the US? Posted: 12 Feb 2019 08:03 AM PST With Nat Geo's latest mini series their trailer is really contradictory to the actual book, the book was mainly about the reston mutation, while it did infect a few humans they didnt produce symptoms and if I remeber correctly they weren't infectious? Where as the trailer portrays US citizens being infected with ebola as a few scenes shows US soldiers (side note it's supposed to be M88 pattern camp but it's a pretty terrible version of M88) carting some infected civilians... submitted by /u/mcbride-bushman [link] [comments]

What is a multi-chromosomal hub? Posted: 12 Feb 2019 07:56 AM PST submitted by /u/NxcxRxmz [link] [comments]

Would it be possible to put a definitive end point on certain infinite numbers like pi if we used a mathematics system that wasn't base 10? Posted: 11 Feb 2019 08:27 PM PST submitted by /u/Lwmons [link] [comments]

When did life evolve sleep? Posted: 11 Feb 2019 11:47 AM PST As a secondary question, which modern animals don't sleep? Why? submitted by /u/aquapearl736 [link] [comments]

On sky Rotation of the moon is linear? Posted: 12 Feb 2019 05:58 AM PST Due to the rotation of the earth the moon seems.to rotate on sky where say the 'right' limb comes up first from behind the horizon and then at moonset touches the ground first. Making it seem like it did a 180 Deg rotation. I assume that the rate depends on the location on the earth but is it a linear one? Can we assume that if we know moonrise and moonset we can know the angle from the fraction of the path that it made? E.g. https://www.zabkat.com/blog/bpic/moon2.jpg submitted by /u/Synethos [link] [comments]

what does silver nitrate do to open wounds? why is it used? Posted: 11 Feb 2019 08:40 PM PST i have an open wound that isnt healing from an operation and have revision surgery scheduled for next week. in the mean time, both my orthopedic surgeon abd my plastic surgeon have put silver nitrate on it to cauterize it. but is that all it does? why silver nitrate instead of electrical cauterization? why does it color your tissue such a gross grey color? my granulation tissue that the doc put the silver nitrate on today kinda sloughed off tonight when changing dressing. why does silver nitrate do that to tissue, and how can that be beneficial to wound healing? submitted by /u/headyslabs [link] [comments]

How does a baby/cells know to create a baby shape? Posted: 11 Feb 2019 04:11 PM PST How does an animal "know" to form its shape while being created in the womb? Why dont babys just come out as something different every time like a kinder surprise? submitted by /u/Iinzers [link] [comments]

Are black holes hot or cold? Posted: 11 Feb 2019 08:11 PM PST Alright so stars obviously burn pretty hot relative to humans, but a question thats been bothering me lately is when something collapses into the singularity of a black hole, is the black hole itself hot or cold if we can even tell. Thanks in advance :) submitted by /u/drei-im-weggle [link] [comments]

How do we define the nature of quantity"Q"that is to be always conserved in the conservation of energy? Posted: 12 Feb 2019 03:28 AM PST Noether's theorem to me explains how a certain defined quantity(Q) is conserved in time(due to the Time translation symmetry), and to be more specific, if we had a ball that is placed in a gravitational field suspended in a height, that ball has a potential energy (Q) that is conserved over time, and if certain translations where to occur, such as the ball falling... that quantity which is initially defined would always be the same regardless of that changes(the ball moving and changing it's height within that gravitational field). It seems to me, that the initial quantity(Q) has to assumed first then Noether's theorem is applied, but what defines the quantity(Q) and how is it certain that it cannot be created nor destroyed, rather conserved? For me, there is a gap of understand that is not clear. submitted by /u/DeltaPhiOverDeltaT [link] [comments]

How long does it take soap to “remove” bacteria? Posted: 11 Feb 2019 12:12 PM PST I've seen that the recommended amount of time for washing hands with soap is 20-30 seconds. I know that friction from rubbing is what allows the soap to remove the bacteria from your hands, but is the 20 second rule constant? Is that just to ensure you cover the full surface area of your hands? If I get my wrist dirty, do I need to rub it with soap for 20 seconds? What about on other materials like ceramic or steel? Does the type of soap impact the amount of time you should spend creating friction (i.e dish soap vs hand soap)? submitted by /u/QueenNibbler [link] [comments]

How do doctors weigh a fetus in the womb? Posted: 11 Feb 2019 08:15 PM PST Seems like there's a lot of factors going on like the weight of the placenta and whatever else is going on. Do they somehow measure the dimensions and assume all babies have the same density? submitted by /u/MySweetClayton [link] [comments]

Why does heroin constrict one's pupils? Posted: 11 Feb 2019 06:36 PM PST submitted by /u/more3qual [link] [comments]

Why do some people attract bug bites (mosquitos, black flies) a lot more than others? Posted: 11 Feb 2019 09:48 AM PST I've been an insect magnet all my life. I'll be walking in the woods, covered in DEET, with pale long clothes tightened at the ends alongside friends in shorts without repellent and I'll still end up being eaten to death while they get the occasional bite. What is there in my blood, or on my skin that attracts the mosquitos? Is there anything that can be done? submitted by /u/Gaboury [link] [comments]

Why is dimethylMercury highly toxic, while ethylMercury is safe? Posted: 11 Feb 2019 08:53 AM PST I recently saw a video by "Chubbyemu", in which he shows the symptoms of a scientist who comes into contact with dimethylMercury. How does this cause so much neurological damage, while ethylMercury is safe to use, such as in vaccines? Edit: And what is the chemical reason for this? What makes dimethylMercury lipophilic, causing it to stay in fatty tissue for large amounts of time, while ethylMercury clears from the body much faster ? submitted by /u/wangl3 [link] [comments]

Why is terminal dehydration known to cause mild euphoria? Posted: 11 Feb 2019 08:18 PM PST Dehydration has been known to cause a sense of "mild euphoria", provided no intravenous is used. - Wiki citation 7 Would also add the psychology flair if I could. submitted by /u/Lone_Narrator [link] [comments]

How do opticians know what prescription glasses to give babies/toddlers? Posted: 11 Feb 2019 08:37 AM PST It's not as though the baby can vocalize whether they can see better or worse in a test. Is there just a standard prescription for babies? How can you tell how bad their eyes are, or if it's near or far sighted? submitted by /u/DoctrDonna [link] [comments]

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