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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AskScience AMA Series: I'm Helen Pilcher, science journalist, comedy writer and former cell biologist. I've just written a book about whether or not it's possible to bring dinosaurs, dodos, woolly mammoths, passenger pigeons and Elvis Presley back from extinction. AMA!

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• AskScience AMA Series: I'm Helen Pilcher, science journalist, comedy writer and former cell biologist. I've just written a book about whether or not it's possible to bring dinosaurs, dodos, woolly mammoths, passenger pigeons and Elvis Presley back from extinction. AMA!
• Where is, or why doesn't the Kuwait Fires in the early 90's show up in the atmospheric CO2 charts?
• Do electrons become more likely to be found in certain places as the temperature approaches 0K?
• Why is the mortality rate of liver cancer so high in spite of the liver having such a great regenerative potential?
• A large body of water produces a tone when it's hit by rain. What frequency is the tone?
• At what age do Orangutans grow their facial flanges, and how long do they take to grow?
• Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
• How many OH and methanol masers may be observed per day over the entire sky?
• What happened Ido Bachelet and leukemia nanobot research?
• If a sufficiently large asteroid came close enough to Earth to interact with the atmosphere, but didn't collide with Earth itself, could it heat the atmosphere to a catastrophic degree?
• Why do we not see stars travel towards white dwarfs "status"in HR-diagrams?
• Can you have a space with half a dimension?
• Is there a way to make light (such as one from a projector) bend around an object and still shine on a surface without being distorted?
• What matters more in determining the yield of a fission reaction- the quantity of reactant present, or how much that reactant is compressed?
• When we measure the distance to a black hole, what are we actually measuring?
• Can sound or light waves be "pushed" faster to surpass it's normal speed?
• What happens to information in a black hole?
• How are the Thermodynamical and Statistical Mechanical definitions of entropy related?
• What is the origin of the force that holds a gyroscope up?
• Why is there no band gap in metals?
• Do all functions have integrals? And if not, is that a proven fact or are they simply undiscovered? Is it possible to look at a function and know for certain whether or not it has an integral?
• How much of an apartment building sized asteroid would burn up on entry?
• If the probability of success in a trial decreased by 10x each time, would a success ever occur after a large amount of attempts?

AskScience AMA Series: I'm Helen Pilcher, science journalist, comedy writer and former cell biologist. I've just written a book about whether or not it's possible to bring dinosaurs, dodos, woolly mammoths, passenger pigeons and Elvis Presley back from extinction. AMA! Posted: 11 Jan 2017 05:00 AM PST I'm a tea-drinking, biscuit-nibbling science and comedy writer with a PhD in Cell Biology from London's Institute of Psychiatry. While I was a former reporter for Nature, I now specialize in biology, medicine and quirky, off-the-wall science, and I write for outlets including New Scientist and BBC Focus. My new book Bring Back the King, discusses the possibility of bringing back entire species from their stony graves. Unusually for a self-proclaimed geek, I was also a stand-up comedian, before the arrival of children meant I couldn't physically stay awake past 9pm. I now gig from time to time, and live in rural Warwickshire with my husband, three kids and besotted dog. I'll be here to answer questions between 7 and 9pm UK time (3-5 PM ET). Ask me anything! submitted by /u/AskScienceModerator [link] [comments]

Where is, or why doesn't the Kuwait Fires in the early 90's show up in the atmospheric CO2 charts? Posted: 10 Jan 2017 01:57 PM PST I was talking with my buddy about CO2 emissions and got on the subject of natural sources. Volcanoes and forest fires and such. Then it proceeded in to the Kuwaiti oil fires, so I googled it. "The total amount of oil burned is generally estimated at about one billion barrels. Daily global oil consumption in 2015 is about 91.4 million barrels;the oil lost to combustion would last 11 days at modern usage rates." So I assume that this would cause a spike in the atmospheric CO2, but when I look up charts, I don't see a spike? What's the best most accurate chart? I'd assume something like the NOAA would be up there. When I look up others, like CO2.Earth, there's actually a big drop in emissions around that time. I'm not a data guru, maybe I'm missing or misinterpreting the data. Can someone maybe shed some light on this? Update: The idea before this was answered was, with all that extra CO2 belching into the atmo with little effect, is CO2 really that bad if the Kuwait fires aren't causing a huge spike. And I didn't like this, yet if it was the case and what my conclusions drew to, then I guess I'd accept it until someone taught me better. But thanks to thanks to /u/CrustalTrudger, for cranking out some math so my brain could understand and see the big picture and 180ed the train of thought that was heading down a track that I disagreed with. Now I'm thinking, if all the oil being burned barely made a dent in overall CO2 emissions, man, we humans pollute alot! THANKS EVERYONE!!! I'M HAPPY I DIDN'T GO FULL RETARD ON CLIMATE CO2 EMISSIONS:-) submitted by /u/firenze86 [link] [comments]

Do electrons become more likely to be found in certain places as the temperature approaches 0K? Posted: 10 Jan 2017 03:46 PM PST I know that you can never know the position of an electron, and that molecular movement decreases as the temperature goes down. Once you get very close to absolute zero, do electrons slow down? submitted by /u/The_Virginator [link] [comments]

Why is the mortality rate of liver cancer so high in spite of the liver having such a great regenerative potential? Posted: 11 Jan 2017 06:36 AM PST Edit: Even if detected early, cancer has a high mortality rate, which I find especially unintuitive. My thought was that, if detected before metastases form, the tumor could be removed with most of the liver without loss of function of the organ, drastically minimizing surgical risks (as comparison: lung cancer has to be carefully removed without damaging the lung, while the liver could be operated out almost completely with the tumor if necessary). submitted by /u/thetardyturtle [link] [comments]

A large body of water produces a tone when it's hit by rain. What frequency is the tone? Posted: 10 Jan 2017 07:28 PM PST When it's raining at sea, you can hear a tone produced by the rain hitting the water. It seems to vary by intensity. What is the maths behind the frequency produced? submitted by /u/lordflashhart [link] [comments]

At what age do Orangutans grow their facial flanges, and how long do they take to grow? Posted: 10 Jan 2017 10:50 AM PST Hi, r/askscience. I'd like to know at what age do male Bornean and Sumatran Orangutans grow their facial flanges/cheek pads? And once the pads have started growing, how long does it take until it's fully grown? I'm also unclear whether or not all males grow them or just dominant males. Thanks. submitted by /u/Motherdragon64 [link] [comments]

Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Posted: 11 Jan 2017 07:04 AM PST Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Physics, Astronomy, Earth and Planetary 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 many OH and methanol masers may be observed per day over the entire sky? Posted: 11 Jan 2017 06:25 AM PST I have heard these masers are ubiquitous and that they are regularly observed, yet I was wondering if there is a quantitative estimate associated with how frequently they are actually observed (or can be observed). submitted by /u/CallMeDoc24 [link] [comments]

What happened Ido Bachelet and leukemia nanobot research? Posted: 11 Jan 2017 06:51 AM PST During the spring of 2015 Ido Bachelet and his team started testing their nanobots on a leukemia patient. Since the 15th of may 2015, no further information has been released about this research. What happened to Ido Bachelet and his research team and most importantly, what happened to the patient? submitted by /u/RageQuitzzz [link] [comments]

If a sufficiently large asteroid came close enough to Earth to interact with the atmosphere, but didn't collide with Earth itself, could it heat the atmosphere to a catastrophic degree? Posted: 11 Jan 2017 04:03 AM PST If it came very close to the moon, could it disrupt its orbit causing tidal effects on Earth? submitted by /u/to_go_tea [link] [comments]

Why do we not see stars travel towards white dwarfs "status"in HR-diagrams? Posted: 11 Jan 2017 05:44 AM PST I see stars traveling from blue giants to red giants and I see stars travle from the main sequence up to become giants. Why is there a large space between the main sequence and white dwarfs? https://upload.wikimedia.org/wikipedia/commons/7/78/H-R_diagram_-edited-3.gif submitted by /u/Snosaet98 [link] [comments]

Can you have a space with half a dimension? Posted: 10 Jan 2017 07:26 PM PST I've read that fractals can sometimes have a fraction of a dimension, but people say that the number really only describes how much bigger it gets when you double its size. What they don't describe is WHAT is getting bigger. Does a menger sponge have have a "volume" measured in m2.7268 ? If so, how do you point to a coordinate in the fractal? submitted by /u/chunkylubber54 [link] [comments]

Is there a way to make light (such as one from a projector) bend around an object and still shine on a surface without being distorted? Posted: 10 Jan 2017 11:31 PM PST I was watching this video about a projector that can make any surface an Android touch screen. If someone were to click a button on this projection, their hand would make a shadow and block off the image it is in front of. Is it possible to bend light around an object such as a hand so that the rest of the projection is not distorted? How might they implement this technique into their technology? submitted by /u/watts_duhnaim [link] [comments]

What matters more in determining the yield of a fission reaction- the quantity of reactant present, or how much that reactant is compressed? Posted: 10 Jan 2017 12:40 PM PST I'm not really a science major, but this question has been bugging me for a while. I get the basics of how a fission reaction is triggered, just not how it scales. submitted by /u/Savato93 [link] [comments]

When we measure the distance to a black hole, what are we actually measuring? Posted: 11 Jan 2017 04:22 AM PST Let's say that the sun was replaced with a solar-mass black hole, so that the earth's orbit didn't change. We would say that the new black hole was 1 AU, or 8 light-minutes, from earth. But what exactly are we measuring? If we measure the time it takes a beam of light to actually travel from the earth to the black hole, we wouldn't measure 8 minutes. We would measure an infinite amount of time. Similarly, if we got into a near-light-speed spaceship and traveled to the event horizon, it would take much less than 8 minutes to get there. So if neither the stationary observer nor the near-light-speed traveler measures the trip as taking 8 minutes...by what metric are we concluding that the black hole is actually 8 light-minutes away? It seems like black holes would always be infinitely far away, from our point of view. submitted by /u/degenerate-matter [link] [comments]

Can sound or light waves be "pushed" faster to surpass it's normal speed? Posted: 11 Jan 2017 03:22 AM PST Might be a dumb question but could sound be "pushed" faster than 340m/s? Are there any factors that affect the speed of it? submitted by /u/lordmattb [link] [comments]

What happens to information in a black hole? Posted: 10 Jan 2017 05:57 PM PST Basically I've been trying to learn about space time, relativity, and black holes. Now I am not a scientist by any stretch however these things have always fascinated me. Now I've done some googling pertaining to the question I'm about to ask, I'm looking to make sure I understand correctly. When it is said that "information is lost" when something goes into a black hole, does that mean that if a electron (or whatever it is) goes into a black hole it is just I guess shredded so that everything that made it an electron (or whatever) is just disassembled and I don't know if scattered is the right word, but scattered within the singularity? So the pieces are still there but they're disassembled and so on? Or just gone and there are no pieces? Thanks in advance for the explanation. submitted by /u/stankybumbum [link] [comments]

How are the Thermodynamical and Statistical Mechanical definitions of entropy related? Posted: 10 Jan 2017 08:40 PM PST There exist two definitions of entropy in Physics, Clausius entropy (dS=dQ/T) and Boltzmann entropy (S=k ln W). These two expressions seem completely different and yet it can be seen that they are equivalent, as they are both used together when deriving the Boltzmann Distribution and Planck's Law (Planck's derivation). Since Clausius's entropy came first, it seems to me as if Boltzmann's entropy is derived from it, but the closest thing to a derivation I've seen is the change in entropy of an ideal gas under isothermic expansion. Anyone care to enlighten me about how one is derived from another? submitted by /u/isnar000 [link] [comments]

What is the origin of the force that holds a gyroscope up? Posted: 10 Jan 2017 03:12 PM PST I understand why the gyroscope behaves like it does. Using the Poisson bracket notation it is easy to achieve the equations of motion, so please try not to go in depth with the conservation of angular momentum explanation. What I don't understand is how this behaviour is consistent with Newton's equations of motion. I will use this image in order to explain myself properly: https://www.oldbookillustrations.com/wp-content/high-res/1885-1891/gyroscope-1600.jpg In the image, the rod can apply a force on the center of mass only in directions perpendicular to the z axis (Let z axis be normal to the surface of the Earth). We know that gravity applies a force in the "-z" direction. Now there should be at least two more forces that allow the system to behave like it does. Since the center of mass wont accelerate on the z axis, the total force acting on it on the z axis should be 0. Then we should have a force, lets call it force1, in the "+z" direction that cancels the gravitational force. Also the gyro in the image will rotate around the z axis even though it had no initial radial speed. Thus; there should also be a force, call it force2, that starts that motion and fades away as the system reaches the equilibrium state, when the gyroscope rotates with a constant angular velocity around the z axis. Do such forces as force1 and force2 exist? If they do, what type of forces they are and what are the applying agents? My questions may be ill-stated and my assumptions preceding the questions may be wrong. I guess I'm missing something fundamental and obvious here. I may clarify any points I made if necessary, so please point out if there are any ambiguities in my argumentation. Thank you. submitted by /u/aspoontooshort [link] [comments]

Why is there no band gap in metals? Posted: 10 Jan 2017 10:29 AM PST Additionally, I understand the overlap of s and d bands in the alkaline/alkaline earth metals and transition metals. What I don't understand is why group 2B elements conduct electricity. Do they overlap with the higher in energy p band? If so, why don't they have a band gap like semiconductors? My chemistry book doesn't cover this all that extensively and I want to fully understand it before continuing to the next subject. submitted by /u/Carbocations [link] [comments]

Do all functions have integrals? And if not, is that a proven fact or are they simply undiscovered? Is it possible to look at a function and know for certain whether or not it has an integral? Posted: 10 Jan 2017 08:22 AM PST I'm taking Calculus AB, and this question occurred to me in class today. submitted by /u/Dashjack30 [link] [comments]

How much of an apartment building sized asteroid would burn up on entry? Posted: 10 Jan 2017 12:04 PM PST I read this article: https://www.vice.com/en_au/article/earth-was-almost-hit-by-an-asteroid-and-no-one-saw-it-coming Aside from the ridiculous drawing which shows the asteroid as almost the size of the moon, it got me thinking: how much of that asteroid would burn up on entry? Would the entry itself cause a massive shock wave? Basixally, what would have happened if it had hit us? submitted by /u/philequal [link] [comments]

If the probability of success in a trial decreased by 10x each time, would a success ever occur after a large amount of attempts? Posted: 10 Jan 2017 06:00 PM PST Let's say there's a game in which the odds of winning is 1/10. If I don't win, I get to play again, where the odds of winning is 1/100. The odds of winning decrease by 10x each time I don't win, but I'm free to continue forever. Let's say I'm at a super high number, attempt #10E18... but still haven't won. Is it possible that I'll ever win, if I go forever? And at what point should a win be expected by? submitted by /u/Leporad [link] [comments]

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Is there anything the human body has three of?

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• Is there anything the human body has three of?
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• Why do the same number of molecular orbitals form from the amount of atomic orbitals they are made of?
• Laniakea and Virgo Superclusters - What one are we in?
• Do we have any approachable models that clearly show how dark energy acts? Have we every actually observed it?

Is there anything the human body has three of? Posted: 09 Jan 2017 07:33 PM PST submitted by /u/manic_lethargy [link] [comments]

If I were to push an object that is one light year long, how long would it take for the other end to move? Posted: 10 Jan 2017 05:17 AM PST Let's say you have a wooden plank that is a light year long and it's just there in empty space. If I were to push one end of it, when would the other end move? I see three options here: At the same time as I pushed the first end. This seems like the least plausible explanation, since that would mean information would have been carried on faster than the speed of light. Exactly one year later. This seems more logical, but I'm not sure whether the force you exert on the first end can travel at the speed of light through the plank. Later than one year later. This seems the most plausible. But then I still don't know how fast the force would move through the plank, and why it has that specific speed. Another option. I'm open to all answers. P.S.: I'm a second year physics student so answers can go deeper into the physics of what's happening. submitted by /u/SvennoBenno [link] [comments]

Can quantum tunneling affect particles [i.e., electrons] and result in "jumping" from inside the event horizon to outside? Posted: 09 Jan 2017 05:59 PM PST submitted by /u/jacobpilawa [link] [comments]

What happens physically when I rotate the knob on an analog radio to change the station? Posted: 09 Jan 2017 03:33 PM PST submitted by /u/sarkaprof [link] [comments]

Are there evidences from receptor studies in-vivo in-human in psychiatric diseases? Posted: 10 Jan 2017 05:54 AM PST I know that most psychiatric diseases are attributed to chemical imbalance of receptors in the brain, and that the drug used to treat them focus on having an impact on such receptors. I also know that, especially like a decade ago, there were lots of tracers binding to these receptors in nuclear medicine (dopamine, serotonine and many Others). I was wondering whether they were used for studies in psychiatric diseases and if they gave us any useful insight about them! submitted by /u/lucaxx85 [link] [comments]

Since light takes time to travel how many stars in our night sky don't actually exist anymore? Posted: 09 Jan 2017 09:33 PM PST submitted by /u/fukinell [link] [comments]

Why did we use pig insulin instead of primate insulin? Posted: 10 Jan 2017 04:09 AM PST Since humans are apes, why did we use pig insulin instead of those from other apes such as chimpanzees or baboons? submitted by /u/RickySamson [link] [comments]

What do neutron stars really look like? Posted: 09 Jan 2017 07:36 PM PST Neutron stars are almost always depicted faint with surface features readily visible, spinning rapidly on its magnetic axis. However, pulsars such as the crab pulsar do not certainly look like this. Before you answer, just know I already l know what hotspots and the precessing astrophysical jets are, so you don't need need to explain it. What I'm curious about is the atmosphere of the star and how the magnetosphere and gravitational lensing affects it. Also how bright would the jet be in comparison to the neutron star? submitted by /u/Lespion [link] [comments]

Are there diminishing returns in the learning process? Do different learning styles tend to have different returns? Do we know why? Posted: 09 Jan 2017 02:07 PM PST submitted by /u/VulpineKing [link] [comments]

How discrete are the energy levels that electrons can occupy? If a photon of wavelength 800 nm was required to promote an electron, would a photon of 800.00001 nm suffice? Posted: 09 Jan 2017 11:07 AM PST Assuming that the electron is originally at ground state. I know that electrons can only exist in discrete energy levels, but what is the margin of error for the energy of a photon that an electron can absorb to be promoted? submitted by /u/ItsTotallyDave [link] [comments]

With all this talk of us losing our coral reefs within X amount of years, because of climate change or whatever. Has this ever happened before? Does the world go through cycles and after a certain time it'll all just grow back fresh and new? Posted: 09 Jan 2017 10:19 PM PST submitted by /u/befstrknauf [link] [comments]

What part of the brain helps us keep track of time itself and how does it work? Posted: 09 Jan 2017 11:24 AM PST submitted by /u/iSh0tYou99 [link] [comments]

What stops us from being able to see SUSY particles if we are able to see standard particles just fine? Posted: 09 Jan 2017 07:52 PM PST As far as my understanding goes we are completely able to see standard particles. What is stopping us from seeing SUSY particles (being that they do exist?)? Is it an equation we have yet to discover? Or am I just completely misunderstanding Supersymmetry? submitted by /u/OrganicXavi [link] [comments]

Is science able to completely discount the possibility that there once existed on Earth any civilization as technologically advanced as our own, but now lost for whatever reason, say 100s of thousands, or millions or even a billion years ago? Posted: 09 Jan 2017 07:43 AM PST submitted by /u/darlingeye [link] [comments]

Can a neutron accelerated at large enough speeds break a helium atom into hydrogen atoms? If not can it at least release one nucleon from the atom? Posted: 09 Jan 2017 12:16 PM PST The title is pretty self explanatory. I do have another question: In general, when a certain particle hits an atom's nucleus, does it transfer energy to that nucleus ? For the nucleus to break, should the energy transferred be equal to the binding energy of said atom ? Edit: I tried to answer this question on my own but I don't know if what I did is correct since I didn't get a response on r/askphysics. Link to original post submitted by /u/pikaAAK [link] [comments]

What happens when a radioactive atom involved in a chemical bond decays? Posted: 09 Jan 2017 07:51 AM PST Would the bond be maintained or would it decompose? Would it make a difference whether it was an ionic or molecular bond? submitted by /u/mirvine_ [link] [comments]

How does an octopus know what colors to change to in order to blend in to its surroundings? Posted: 09 Jan 2017 11:51 AM PST submitted by /u/mudnuka [link] [comments]

What is E8, and how did mathematicians discover it? Posted: 09 Jan 2017 10:44 AM PST I recently saw Eric Weinstein, on the Rubin Report, talk about certain inexplicable mathematical objects, such as E8. He gives a fairly decent explanation - that it is an object, shown by math, that exists in 248 dimensions - but this still leaves me without a clear picture of what it is. In what way does this object "exist"? How did math demonstrate this to us? How does one "discover" such a thing by mathematics? submitted by /u/essentialsalts [link] [comments]

What will happen if Moore's Law doesn't continue? Posted: 09 Jan 2017 01:12 PM PST As we are approaching the minimal size of transistors without quantum tunneling becoming a problem what will happen to the tech market and industry once the transitor ceiling is reached? Would the market and industry decline if tech development slows? Is there any potential developments that could over take current silicone based chips? submitted by /u/Duuutch [link] [comments]

Why do the same number of molecular orbitals form from the amount of atomic orbitals they are made of? Posted: 09 Jan 2017 12:33 PM PST Hello I'm slightly confused about the number of MO's (Molecular orbitals) formed from AO's (Atomic Orbitals) I'm a first year Chemistry undergraduate and my textbook says there must always be equal amounts of MO's as there are AO's - As an example if 2 AO's were "merged" then I would have 2 MO's one of which is bonding and the other antibonding (See picture linked) MO Diagram: http://imgur.com/LdCffqw How is this possible? From my understanding bonding MO's occur when AO's constructively intefer whereas antibonding MO's occur when AO's destructively intefer. If 2 AO's form 2 MO's, this suggests to me that the AO's simultaneously participate in constructive and destructive inteference which doesn't make sense. Have I misinterpreted this concept? submitted by /u/IntrusiveInveigling [link] [comments]

Laniakea and Virgo Superclusters - What one are we in? Posted: 09 Jan 2017 08:18 AM PST So, I'm kinda confused. Some people say that we are in the Laniakea Supercluster, and some say we are in the Virgo Supercluster. I don't really understand. Are these just two names for one or something? Could someone maybe explain? Thanks. submitted by /u/miniekk [link] [comments]

Do we have any approachable models that clearly show how dark energy acts? Have we every actually observed it? Posted: 09 Jan 2017 07:41 AM PST From my (limited) understanding, matter bends space time to attract other matter. To simplify, planets bend space time in sort of a bowl shape (in all directions) that cause other matter to sort of "fall into" their gravitational field. Dark energy is the opposite. It bends space time to repel items, almost like an upside down bowl. By propelling matter toward something with a large gravitational pull, it will go straight into that object. If we propel matter toward an area the generates dark energy, the object would slow down, then potentially reverse/change directions depending on the trajectory. My question is this: First, is my understanding of dark energy somewhat correct? Are there areas of dark energy like there are areas with a gravitational field? My bigger question is this: have we ever done an experiment (maybe with photons?) where we have found an area of dark energy and could actually see it work or have our observations been purely mathematical? Thanks for reading! submitted by /u/WubbaLubbaDubStep [link] [comments]

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