What happened with Zika, is it gone now?

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• What happened with Zika, is it gone now?
• How was the newly found huge Japanese "rare earths" deposit formed?
• In the ISS, how do astronomers keep the station clean?
• How does a viscous disinfectant hand gel become more liquid when rubbing it?
• Why are many Midwest US farms harvested/grown in circular patterns?
• If I donate blood, will my blood pressure lower?
• Why did NASA send Rovers (spirit, curiosity, Opportunity) to Mars but destroy Cassini?
• How does a CFC (e.g. CCl2F2), a heavier than air gas, reach the stratosphere, over 20 miles above sea level?
• What can cause bears to not make it through hibernation?
• Are Cerenkov radiation and Landau damping related?
• People generally have the same joints in their bodies with size being the main difference between individuals. Besides injury and medical conditions, what else causes people to have different gaits when they walk or run?
• How do you perform an eye test on a baby or toddler when they can't communicate verbally?
• Does reading/learning to read sheet music activate the same regions of the brains as reading/learning to read a foreign language ?
• How can we be so sure that species of theropods like Yutyrannus were feathered, but have a hard time finding out if others like the T.Rex were fully covered with feathers or were only feathered in certain regions?
• How did we discover plasma? (The 4th State of Matter)
• Why is space equipment/satellites/rocketry assembled and kept in clean room environments?
• How do other baryons behave inside atomic nuclei?
• What is it about the digestive system of animals that makes them able to raw meat, whereas it would make a human sick?
• Are there any methods of recording uncertainties without observing them?
• Why is neutron degeneracy pressure "stronger" than electron degeneracy pressure?
• How can we use The Doppler Effect to calculate the exact trajectory and speed of an object?
• How fast do radioactive things boil water?

What happened with Zika, is it gone now? Posted: 17 Apr 2018 05:24 AM PDT submitted by /u/LEVITlCUS [link] [comments]

How was the newly found huge Japanese "rare earths" deposit formed? Posted: 16 Apr 2018 01:47 PM PDT Link to the story So the higher elements are formed inside Super Novae and then spewed out into the galaxy where they mix with other clouds of matter that eventually became our solar system and planet. So they have been around for billions of years before and billions of years since becoming part of the Earth. But why are they so dense in just this one area and why are they in the form of mud? Also, how likely is it that there are many more of these yet to be discovered? submitted by /u/Emu_or_Aardvark [link] [comments]

In the ISS, how do astronomers keep the station clean? Posted: 17 Apr 2018 04:25 AM PDT Dust (food, human dead cells...) stay in there. Do they "hoover" the environment? Which technologies do they have to do it? submitted by /u/EtG_Gibbs [link] [comments]

How does a viscous disinfectant hand gel become more liquid when rubbing it? Posted: 17 Apr 2018 04:16 AM PDT Even when I merely apply some on my hand and not rub it, it will become more runny on the surface of my palm. I guess it has something to do with the alcohol? Can someone explain? Thanks! submitted by /u/AIforce [link] [comments]

Why are many Midwest US farms harvested/grown in circular patterns? Posted: 16 Apr 2018 11:28 PM PDT Maybe this gravitates more towards agriculture, but I believe r/askscience can justify an answer. In scanning Google Maps in regions of Kansas, Nebraska, and other parts of the United States Midwest, I'm wondering where large regions of land are being farmed/harvested in (nearly) perfect circular patterns? Is there an agricultural benefit to doing so? Google Maps link here submitted by /u/Savanty [link] [comments]

If I donate blood, will my blood pressure lower? Posted: 16 Apr 2018 10:21 PM PDT Will it lower significantly? How long would the pressure be abnormal? submitted by /u/ouiouibitch [link] [comments]

Why did NASA send Rovers (spirit, curiosity, Opportunity) to Mars but destroy Cassini? Posted: 16 Apr 2018 11:05 PM PDT To the best of my little knowledge about planetary science, we crashed Cassini into Saturn's atmosphere; so that Enceladus, Titan would be unadulterated by any microbes because there is a slight chance they might be habitable for future generations. If so, why then did we land rovers on Mars as they may have carried microbes to Martian surface? submitted by /u/Eclipsespirit [link] [comments]

How does a CFC (e.g. CCl2F2), a heavier than air gas, reach the stratosphere, over 20 miles above sea level? Posted: 17 Apr 2018 03:46 AM PDT submitted by /u/rickdidnothingwrong [link] [comments]

What can cause bears to not make it through hibernation? Posted: 17 Apr 2018 07:20 AM PDT Are there thresholds for how much body fat they need to have gained by the end of the summer? Do we know of sets of circumstances that can lead to them not making it through the winter? submitted by /u/QuirksNquarkS [link] [comments]

Are Cerenkov radiation and Landau damping related? Posted: 16 Apr 2018 10:56 PM PDT I was told recently that wave-particle resonances for waves travelling at the frequency of the particle's parallel velocity were Landau or Cerenkov resonant since the particle effectively feels a wave of zero frequency. Perhaps I am simply missing something very obvious, but why does this condition correspond to both Landau and Cerenkov resonance? One is simply wave damping (or growth) on particles with thermal speeds corresponding to the wave's phase velocity, while the other denotes radiation emitted from a medium where the particle's motion exceeds the local speed of light. What's the commonality with the above wave-particle resonance? submitted by /u/CallMeDoc24 [link] [comments]

People generally have the same joints in their bodies with size being the main difference between individuals. Besides injury and medical conditions, what else causes people to have different gaits when they walk or run? Posted: 16 Apr 2018 03:43 PM PDT submitted by /u/Watts300 [link] [comments]

How do you perform an eye test on a baby or toddler when they can't communicate verbally? Posted: 16 Apr 2018 09:35 AM PDT submitted by /u/The_Demolished_Man [link] [comments]

Does reading/learning to read sheet music activate the same regions of the brains as reading/learning to read a foreign language ? Posted: 16 Apr 2018 03:44 PM PDT submitted by /u/Sna__ [link] [comments]

How can we be so sure that species of theropods like Yutyrannus were feathered, but have a hard time finding out if others like the T.Rex were fully covered with feathers or were only feathered in certain regions? Posted: 16 Apr 2018 05:29 PM PDT submitted by /u/Graysonspop4444 [link] [comments]

How did we discover plasma? (The 4th State of Matter) Posted: 16 Apr 2018 02:11 PM PDT How exactly did we discover plasma? Have we ever heated gas hot enough to create plasma in a lab environment? Does plasma have an adverse effects upon the human body when exposed? submitted by /u/olleh74 [link] [comments]

Why is space equipment/satellites/rocketry assembled and kept in clean room environments? Posted: 16 Apr 2018 05:46 PM PDT submitted by /u/RedHotLamp [link] [comments]

How do other baryons behave inside atomic nuclei? Posted: 16 Apr 2018 10:43 PM PDT Neutrons decay in free space, but are apparently stable inside some atomic nuclei. In other nuclei protons decay. Are there theories or experiments describing how the stability of other baryons are affected? I've found quite a few interesting papers on hypernuclei which I am working through, but very little more easily digested material. Also the papers I have read so far have all discussed the properties of the nucleus itself, mostly binding energy, but not the affects on the constituent baryons. It seems to me that if the half-life of neutrons can be increased by 1020 times, then a lambda baryon which usually decays in under a nanosecond might last for a more human scale timeframe, seconds or years, or even be effectively stable. I also see that the additional binding energy in light nuclei when a hyperon is added is up to around a tenth the mass of the strange quark, which suggests to me that it will be energetically favourable for the strange quark to decay even if the entire nucleus is then left unstable, but is near enough in scale I would expect some change to the decay. Has there been research on heavier hypernuclei, like iron or lead? Thanks. submitted by /u/suoirucimalsi [link] [comments]

What is it about the digestive system of animals that makes them able to raw meat, whereas it would make a human sick? Posted: 16 Apr 2018 01:42 PM PDT I feel like all other carnivores have the ability to eat raw meat, but humans do not. Do they have some part of their metabolism that allows this? Or would humans be able to do it as well if we took time to slowly eat more and more raw meat? Additionally, I've heard theories that cooking food is part of why humans are more intelligent than other creatures. Our bodies don't have to use the extra energy to break down the already cooked food, so it goes into our cognitive processes instead. Feel free to expand on that too. Thanks for the insight! submitted by /u/SilverSwizz [link] [comments]

Are there any methods of recording uncertainties without observing them? Posted: 16 Apr 2018 04:27 PM PDT Quantum Mechanics has many particles and functions which are in a state of uncertainty until they are observed, where they collapse into a single state. My question is, are there any methods, theoretical or real, to record such things for future observation? For example, is it possible to freeze a quantum state in time so that it may be observed later on, and the data recorded? And as a further question, in quantum mechanics, what exactly counts as observation? Is it only human observation, or can it also be animal observation? What about mechanical? And does changing the observer create a difference in the observed state? submitted by /u/yay855 [link] [comments]

Why is neutron degeneracy pressure "stronger" than electron degeneracy pressure? Posted: 16 Apr 2018 10:29 AM PDT A white dwarf collapses into a neutron star when its mass overwhelms electron degeneracy pressure, and its mass gets compressed into neutrons. A neutron star collapses into a black hole when its mass overwhelms neutron degeneracy pressure, and its mass gets compressed into (???). But the neutron star collapse clearly happens at a higher mass than a white dwarf collapse. This would seem to imply that neutron degeneracy can support greater pressure than electron degeneracy. Why is that, given that they are both (in my understanding) governed by the same Pauli exclusion principle? submitted by /u/playful_pachyderm [link] [comments]

How can we use The Doppler Effect to calculate the exact trajectory and speed of an object? Posted: 16 Apr 2018 05:33 PM PDT Ok, so I understand the basics of The Doppler Effect: when an object is travelling towards you, it compresses and shortens the perceived wavelength of light/sound emitted. When it is travelling away, it increases the perceived wavelength. The thing that I don't understand is how we can calculate an objects exact trajectory. For example, if an object is going in a direction perpendicular to the distant between you and the object, no matter how fast it is going, there would be no Doppler Shift, since said object isn't moving towards or away from you. Am I mistaken in that the Doppler Effect can only determine movement in one axis? Or is there some other way to detect the object's movement? submitted by /u/Superslayer514 [link] [comments]

How fast do radioactive things boil water? Posted: 16 Apr 2018 03:10 PM PDT I read somewhere that nuclear power was just using nuclear things to boil water and using the steam to spin a turbine. Is it really that much more effective than burning something else to do the same thing? Also is that the best way to be using nuclear power? I imagined it would have been way more complicated than boiling water. submitted by /u/ilikebutteryfries [link] [comments]

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Why do cognitive abilities progressively go down the more tired you are, sometimes to the point of having your mind go "blank"?

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• Why do cognitive abilities progressively go down the more tired you are, sometimes to the point of having your mind go "blank"?
• Why can't I receive information from the future via delayed choice quantum eraser with a different beam splitter?
• What determines which X chromosome becomes active during the X inactivation process?
• In the winter underneath frozen streams and rivers, what microbial colonies live there and thrive there?
• What is the scientific/biological reason for wanting to squeeze anything we deem cute?
• Are eyes like telescopes? The bigger they are the more light they can detect? If so how big would they have to be in order to see nebulae unassisted?
• How is caffeine removed from coffee?
• What makes our sunsets so beautiful and vibrant on some evenings, and others not so vibrant?
• Is it possible to create a molecule containing a noble gas ?
• In reactions (chemical or nuclear) where light is a product, is there an acceleration phase that photons undergo or do they simply exist at C?
• Structurally, how can you tell the difference between the aorta and superior vena cava?
• A creationist told me that science, under uniformitarianism, basically assumes that things have always occured as they do now. Is this true? If it's true isn't that a problem?
• Can dogs have recessive genes show up in later generations?
• Does driving a nail into a tree actually "hurt" it?
• Has a gravitational force been observed between massless particles?
• Has there ever been a documented instance where a planet in a binary star system orbits in a figure 8 motion around both stars?
• How does magnetic field density behave when there is more than one wire generating current? Is it cumulative, or is it more complicated than that?
• Would it be possible to build telescope using long pipes or multiple sheets with aligning holes?
• Time is relative. I can understand this on a basic level, but how can time be faster in the past?
• How fatal would a natural nuclear reactor like that at Oklo be to nearby life?
• Why do transformers need a magnetic core when you can just put a coil in another coil?
• Tree rings are often used to estimate historical atmospheric temperatures. However, numerous other variables (rainfall/snowpack, herbivory, volcanic activity, fires, etc) also affect the growth rates of trees, so why do we place so much trust in tree rings to measure past temperatures?
• Is it possible to gain more weight than the physical weight of the food you are eating?

Why do cognitive abilities progressively go down the more tired you are, sometimes to the point of having your mind go "blank"? Posted: 15 Apr 2018 09:43 PM PDT submitted by /u/penatbater [link] [comments]

Why can't I receive information from the future via delayed choice quantum eraser with a different beam splitter? Posted: 15 Apr 2018 09:58 PM PDT It seems that you cannot send information to the past (aka receive information from the future) with delayed choice because the waveform interference pattern cannot be understood with the screen alone because you need to first examine the detectors to make sense of the dots on the screen. The current thinking seems to be that you cannot send information across time because in the scrambling "eraser" section of the experiment, we send photons through a beam splitter which results in 50% landing in detectors C and the other 50% in detector D. Due to the fact their interference patterns subsequently are perfectly out of phase, you cannot decipher waveforms with the screen alone because without being able to reference the information in the detectors, the screen alone just looks like a bunch of unorganized dots with no apparent interference pattern. However, is there a beam splitter available to science which could send most of the photons to one of the two detectors (for example, 99% go to detector C once they are in the eraser portion of the experiment). It would seem to me that if there's a beam splitter than can send most of the photons just to detector C (99% instead of 50%), you would pretty clearly be able to see either a waveform or not, despite a little bit of fuzziness. This idea also seems like it would not violate nature's rules about not having certainty about path information to get the waveform interference pattern. References: https://www.youtube.com/watch?v=8ORLN_KwAgs https://youtu.be/MuvwcsfXIIo?t=4m https://youtu.be/VYZQxMowBsw?t=3m18s submitted by /u/printThisAndSmokeIt [link] [comments]

What determines which X chromosome becomes active during the X inactivation process? Posted: 15 Apr 2018 09:32 PM PDT Shortly after the conception of a female mammal, one of the X chromosomes is inactivated. I'm curious as to what determines which of the two X chromosomes becomes the active one in a given cell? edit: clarifying question. submitted by /u/Moonpenny [link] [comments]

In the winter underneath frozen streams and rivers, what microbial colonies live there and thrive there? Posted: 15 Apr 2018 09:30 PM PDT I'm just wondering since I'm sending a cryolander down to a frozen river next year and I'm wondering if anything lives and thrives there other than fish. Thanks. submitted by /u/zyzzyne_ [link] [comments]

What is the scientific/biological reason for wanting to squeeze anything we deem cute? Posted: 15 Apr 2018 08:57 PM PDT It doesn't matter what it is. When it's cute we must touch it and preferably squeeze it. Why?? submitted by /u/RedRaiderRx09 [link] [comments]

Are eyes like telescopes? The bigger they are the more light they can detect? If so how big would they have to be in order to see nebulae unassisted? Posted: 16 Apr 2018 04:58 AM PDT submitted by /u/Oldamog [link] [comments]

How is caffeine removed from coffee? Posted: 15 Apr 2018 03:53 PM PDT I'm wondering how the process works by removing caffeine from coffee to make decaffeinated coffee submitted by /u/LucidDreamState [link] [comments]

What makes our sunsets so beautiful and vibrant on some evenings, and others not so vibrant? Posted: 16 Apr 2018 02:00 AM PDT submitted by /u/niuniu1218 [link] [comments]

Is it possible to create a molecule containing a noble gas ? Posted: 16 Apr 2018 05:31 AM PDT For example, would it be possible to take away an electron from a Helium atom and then force it to link with a Hydrogen atom ? submitted by /u/composedEdius [link] [comments]

In reactions (chemical or nuclear) where light is a product, is there an acceleration phase that photons undergo or do they simply exist at C? Posted: 16 Apr 2018 07:46 AM PDT In combustion reaction or nuclear reactions light is a product of the reaction. Is there a point where photons have to be accelerated to the speed of light or do photons only exist at C? submitted by /u/GuitarCFD [link] [comments]

Structurally, how can you tell the difference between the aorta and superior vena cava? Posted: 16 Apr 2018 02:20 AM PDT I am currently studying the structure of the heart in biology and, after dissecting a heart am unsure of how you can tell what is the aorta and what is the superior vena cava. I have put a link with images of the heart I dissected if it helps. https://imgur.com/a/sRcxs submitted by /u/maxthekillbot [link] [comments]

A creationist told me that science, under uniformitarianism, basically assumes that things have always occured as they do now. Is this true? If it's true isn't that a problem? Posted: 15 Apr 2018 08:48 PM PDT submitted by /u/BookerDouglas [link] [comments]

Can dogs have recessive genes show up in later generations? Posted: 15 Apr 2018 08:02 PM PDT submitted by /u/Genesiesha [link] [comments]

Does driving a nail into a tree actually "hurt" it? Posted: 15 Apr 2018 04:02 PM PDT Assuming for the sake of argument that it's a rustproof nail (so that infection isn't a factor), does that nail actually harm the tree in any way? Or is the idea that it hurts the tree simply me projecting? submitted by /u/VagabondVivant [link] [comments]

Has a gravitational force been observed between massless particles? Posted: 15 Apr 2018 03:04 PM PDT Light is attracted to mass by gravity (black holes, gravitational lensing). Due to Newton's 3rd law (For every action, there is an equal and opposite reaction) the light will assert a force on the mass via gravity. Extending this, is a gravitational force between photons? And is it large enough to be observed? I understand at high energies, pair production will be a factor, but I was thinking about lower energies than this. Additional question: If you shine two lasers of wavelength X metres in parallel, Y metres apart, how long will it before the beams converge due to gravity. I'm not sure about my logic here. Please correct me if I'm wrong. submitted by /u/12ShotsThenHome [link] [comments]

Has there ever been a documented instance where a planet in a binary star system orbits in a figure 8 motion around both stars? Posted: 15 Apr 2018 08:52 PM PDT submitted by /u/its_always_foreign [link] [comments]

How does magnetic field density behave when there is more than one wire generating current? Is it cumulative, or is it more complicated than that? Posted: 15 Apr 2018 05:36 PM PDT I'm doing some research on ELF magnetic fields generated by electrical wires and appliances. All of the diagrams I've seen of magnetic field strength in relation to distance from the source show just one point source. What happens if there's more than one? For example, in parallel high voltage power lines? Would the density in Tesla or Gauss simply be a matter of calculating the intensity relative to each point and adding or is there more that I have to take into account? submitted by /u/Slid61 [link] [comments]

Would it be possible to build telescope using long pipes or multiple sheets with aligning holes? Posted: 16 Apr 2018 06:31 AM PDT Would it be possible to get an image if one constrained the light to a direction with long pipes in a matrix that only let light through if it is coming from given direction? It could also be made of sheets that basically do what the pipes are meant to do but with longer and longer intervals of space between, and some absorption area around the holes. submitted by /u/jarmoj [link] [comments]

Time is relative. I can understand this on a basic level, but how can time be faster in the past? Posted: 15 Apr 2018 09:28 PM PDT I was reading a list of facts about time and this concept confuses me. I can't seem to wrap my brain around it. Can anyone explain? "It appears that distant galaxies are moving faster than nearby ones, which suggests that the universe is accelerating as it expands. One physicist has suggested that the reason distant galaxies appear to move faster is because in the past, time was faster. If he's correct, this means that in a few billion years, time will be frozen." https://www.factinate.com/things/43-fast-facts-time/ submitted by /u/cinymin [link] [comments]

How fatal would a natural nuclear reactor like that at Oklo be to nearby life? Posted: 15 Apr 2018 08:26 PM PDT How much radiation would such a reactor produce? How fatal would this be to nearby life? Either due to radiation or heat production. How large might the irradiated area be? How much larger or smaller could such a reactor feasibly be? submitted by /u/Admortis [link] [comments]

Why do transformers need a magnetic core when you can just put a coil in another coil? Posted: 15 Apr 2018 08:22 PM PDT So, if I'm not mistaken, a transformer works by guiding the magnetic field from one coil into the center of another coil, thus generating a current. If that's the case, isn't it easier to just put a coil inside another coil, and not only it would be easier to make but it would also allow you to avoid eddy current losses? Thanks in advance submitted by /u/qwerty-_-123 [link] [comments]

Tree rings are often used to estimate historical atmospheric temperatures. However, numerous other variables (rainfall/snowpack, herbivory, volcanic activity, fires, etc) also affect the growth rates of trees, so why do we place so much trust in tree rings to measure past temperatures? Posted: 15 Apr 2018 02:31 PM PDT For example, say a tree was in its optimal temperature condition for two consecutive years in the distant past. Also imagine that the same tree was in sub-optimal rainfall conditions in the first of those two years, but in optimal rainfall conditions in the second year. This change in conditions would cause the tree to grow faster in the second year than in the first. From what I understand (which may be wrong), scientists today would see that tree's rings and, in the absence of other evidence, surmise that the temperature was higher in the first year than in the second simply because of the difference in size between those consecutive rings. Obviously, this would be false, because the temperature was the same in both years. submitted by /u/Wonderful_Toes [link] [comments]

Is it possible to gain more weight than the physical weight of the food you are eating? Posted: 16 Apr 2018 05:49 AM PDT submitted by /u/badRLplayer [link] [comments]

You are subscribed to email updates from AskScience: Got Questions? Get Answers.. To stop receiving these emails, you may unsubscribe now.	Email delivery powered by Google
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How did we first find out there was no oxygen in space?

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• How did we first find out there was no oxygen in space?
• Is the great attractor actually a real thing or is there just a lot of stuff there?
• Why does water damage electronics?
• Is there a physical limit to how fast a human being can run?
• According to a source in 2004; "No prehistoric remains have been found of people older than 50 years". Is this still true?
• What is the significance of kB*T (Boltzmann constant multiplied by temperature) in physics / quantum mechanics?
• Why does the strong force work keeping protons and neutrons when the electrostatic force would push them apart?
• What is that feeling we get when we want to sneeze but can't. What exactly is going on in our noses at that time?
• How do sperm find eggs?
• What's the difference between the "heat death" and "Big Rip" models of the ultimate fate of the universe?
• Is the electroweak force mediated by a carrier other than a photon, W, or Z boson, or does it simply not matter which of the three is mediating a particular interaction?
• Why doesn’t kangaroo blood clot?
• How do great white sharks mate?
• Why are elevators placed at the rear of planes, and not at the front?
• Does space equipment get dirty in space ?
• How are carbon nanotubes made? And are there ways for them to be made commercially?
• How did the transition to an amniotic egg happen?
• Is there a statistically significant difference in any variable depending on the season of the year you were born?
• What has the biggest effect on the nutrition of a fruit/vegetable?
• How are some plants able to survive without direct sunlight, or little to no sunlight at all?
• Why are 2D hexagonal arrays more stable than square or triangular arrays?
• When an airlock gets opened and the contents of a ship or station rush out into space, what happens to the air?
• At which point was Van der Waals' equation necessary for Onnes' work in liquefying helium?

How did we first find out there was no oxygen in space? Posted: 15 Apr 2018 03:55 AM PDT submitted by /u/BigbirdSalsa [link] [comments]

Is the great attractor actually a real thing or is there just a lot of stuff there? Posted: 15 Apr 2018 04:02 AM PDT If you look at the shape of the matter in the universe, it's a web of clusters. I don't really think it's a black hole or anything, but it's more like so much stuff in these clusters that it's bending space and causing galaxies like ours which is like rural hick zone to fall in and eventually join into these dense areas or something. submitted by /u/feelmysoul01 [link] [comments]

Why does water damage electronics? Posted: 14 Apr 2018 07:56 PM PDT submitted by /u/qazqaz3 [link] [comments]

Is there a physical limit to how fast a human being can run? Posted: 14 Apr 2018 10:53 AM PDT submitted by /u/strangelyquarkey [link] [comments]

According to a source in 2004; "No prehistoric remains have been found of people older than 50 years". Is this still true? Posted: 14 Apr 2018 08:06 AM PDT According to Hayflick L. "Anti-aging" is an oxymoron. J Gerontol A Biol Sci Med Sci. 2004 Jun;59(6):B573-8. No prehistoric remains have been found of people older than 50 years. Question a) is this true and b) if yes, is it still true in 2018? submitted by /u/netgeogates [link] [comments]

What is the significance of kB*T (Boltzmann constant multiplied by temperature) in physics / quantum mechanics? Posted: 15 Apr 2018 04:45 AM PDT Learning basic quantum mechanics for chemistry, I have read that only energy levels with energies "less than or comparable to kB*T" are only populated significantly at temperature T. Why is this? As kB*T is such a low value (~4.12E-21 J), does it follow that, at 298 K, only in translational wavefunctions is there a significant population of excited states, whereas only the zero point energy is significantly populated in rotational/vibrational wavefunctions? submitted by /u/Fuckminsterfullerene [link] [comments]

Why does the strong force work keeping protons and neutrons when the electrostatic force would push them apart? Posted: 14 Apr 2018 06:40 PM PDT Why does the strong force work keeping protons and neutrons when the electrostatic force would push them apart? For example, a proton and neutron would go together fine with the strong force, but a proton and another proton won't fit in together because of the electrostatic force. I'm not an expert, but I feel this is a simple scenario that a high school student could fit in together. submitted by /u/Isatis_tinctoria [link] [comments]

What is that feeling we get when we want to sneeze but can't. What exactly is going on in our noses at that time? Posted: 14 Apr 2018 10:17 AM PDT submitted by /u/unit2981 [link] [comments]

How do sperm find eggs? Posted: 14 Apr 2018 04:51 PM PDT submitted by /u/itisjustemily [link] [comments]

What's the difference between the "heat death" and "Big Rip" models of the ultimate fate of the universe? Posted: 14 Apr 2018 01:05 PM PDT (Prefacing this with: I'm not a professional science person, I just love me a bitta space. I'm working on a prose-poem-y thing about anonymous sex and end-of-universe scenarios and I like to think I know a reasonable amount about both, but I only really have first hand experience of one of them and want to be as accurate as I can in the other.) I thought I understood the idea pretty well: flat curvature, accellerated expansion, increased ratio of dark energy to regular matter and dark matter, things getting further away from each other, galaxies and solar systems and individual objects split apart, shit burns out, shit Hawking radiates away, atoms split apart, individual particles are on their own and to far away from each other to possible have any further causal relation to each other, everything is cold and boring and sad, no more pizza, yadda yadda yadda. But I keep seeing them listed as two distinct models. Is it that they're kind of similar or overlap? Or are they mutually incompatible in some way that's gone over my head? submitted by /u/lacanimalistic [link] [comments]

Is the electroweak force mediated by a carrier other than a photon, W, or Z boson, or does it simply not matter which of the three is mediating a particular interaction? Posted: 14 Apr 2018 12:52 PM PDT If it is a new boson, then does that mean that a photon, W, or Z boson could transform into this new boson by gaining energy, and turn back into any of the 3--not necessarily the same as before--if it lost energy? submitted by /u/Unoriginal0000000000 [link] [comments]

Why doesn’t kangaroo blood clot? Posted: 14 Apr 2018 09:45 AM PDT I was watching a nature documentary and they were doing surgery on a kangaroo, and mentioned that kangaroo blood doesn't clot. They didn't say why this was, and google turned up no results. It seems like clotting blood is a critical thing, since a small cut could lead to a kangaroo bleeding to death. Why doesn't this happen? submitted by /u/USAisAok [link] [comments]

How do great white sharks mate? Posted: 14 Apr 2018 05:16 PM PDT submitted by /u/LEVITlCUS [link] [comments]

Why are elevators placed at the rear of planes, and not at the front? Posted: 14 Apr 2018 12:50 PM PDT submitted by /u/benkol03 [link] [comments]

Does space equipment get dirty in space ? Posted: 14 Apr 2018 09:57 AM PDT All kinds of equipment needs regular cleaning from things that get deposited on them, specific to which environment its in. Does the same go for the space station or the the canadarm? Would the effect of these objects in the vacuum of space be strong enough to attract dust and other things? Is there even enough stuff in space to deposit on the equipment for it to matter? submitted by /u/the_walls_have_noses [link] [comments]

How are carbon nanotubes made? And are there ways for them to be made commercially? Posted: 14 Apr 2018 10:09 PM PDT submitted by /u/CyanSvend [link] [comments]

How did the transition to an amniotic egg happen? Posted: 14 Apr 2018 10:22 AM PDT I can't seem to understand the logistics of how egg hatching can evolve. It's not like one generation is born in water, then evolved to lay an egg on land. What was the transition like from water egg to land egg? was there an in between that I don't know about? submitted by /u/SquawSquaw [link] [comments]

Is there a statistically significant difference in any variable depending on the season of the year you were born? Posted: 14 Apr 2018 09:02 AM PDT Like a stronger immune system? A higher likelihood of having certain traits? submitted by /u/oh_hullo_there [link] [comments]

What has the biggest effect on the nutrition of a fruit/vegetable? Posted: 14 Apr 2018 09:34 AM PDT I've seen some people stating that our food has become less nutritiously dense over time. Is this true? I believe they specifically are talking about the vitamins and minerals, not just calories. 2004 Article 2009 Article Is it because food is now picked weeks before consumption (to be shipped to stores) and loses nutrition over time? or Does a crop grown in "dead" soil that is fertilized with "traditional" chemical fertilizers have the same nutrition as a crop grown in a biologically active soil with high percentage of organic matter? Where does hydroponics fit in? or Have modern crop varieties been breed for appearance and not nutrition? or Something else entirely? Thank you for your time. submitted by /u/danieldoesnt [link] [comments]

How are some plants able to survive without direct sunlight, or little to no sunlight at all? Posted: 14 Apr 2018 08:51 AM PDT submitted by /u/ScalpelTiger [link] [comments]

Why are 2D hexagonal arrays more stable than square or triangular arrays? Posted: 14 Apr 2018 09:19 AM PDT I was just reading the following passage in this article: ...surface tension explains the patterns of bubble rafts and foams. The foam will seek to find the structure that has the lowest total surface tension, which means the least area of soap-film wall. But the configuration of bubble walls also has to be mechanically stable: The tugs in different directions at a junction have to balance perfectly, just as the forces must be balanced in the walls of a cathedral if the building is going to stand up. The three-way junction in a bubble raft, and the four-way junctions in foam, are the configurations that achieve this balance. It's the last sentence I want to understand better. Why do the three-way junctions of the hexagonal grid "balance the forces" better? Is there a visual that will help me understand? submitted by /u/El_Poopo [link] [comments]

When an airlock gets opened and the contents of a ship or station rush out into space, what happens to the air? Posted: 14 Apr 2018 08:46 AM PDT submitted by /u/DIXINMYAZZ [link] [comments]

At which point was Van der Waals' equation necessary for Onnes' work in liquefying helium? Posted: 14 Apr 2018 01:42 PM PDT I read that he wanted to prove/disprove his friends theory. What did he wanted to prove? It surely wasn't the quantifiable capability of VdW's equation when a gas is in its phase transition below the critical temperature, because carbon dioxide would be way better for that. So what do the people mean, when they are writing, that he wanted to prove his friends theory. And what does he mean, when he is saying, that he was led by VdW's theory? (His nobel prize was awarded in 1913 and I just tried to read his lecture which one can read for free on the nobelprize site) Thank you in advance submitted by /u/MaesterHiccup [link] [comments]

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