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Saturday, October 7, 2017

If my 60 GB phone is full or empty, is there any difference in weight at the nano level?

If my 60 GB phone is full or empty, is there any difference in weight at the nano level?


If my 60 GB phone is full or empty, is there any difference in weight at the nano level?

Posted: 06 Oct 2017 04:10 PM PDT

If most weather patterns and storms move Eastward in the U.S., why do all the Hurricanes seem to travel Westward?

Posted: 06 Oct 2017 05:37 PM PDT

Why solar panels don’t work with infrared waves?

Posted: 07 Oct 2017 03:52 AM PDT

Does a listening to a radio broadcast weaken the signal?

Posted: 07 Oct 2017 06:38 AM PDT

I use broadcast signal as an example of a non-rival good when teaching economics. And on a reasonable scale it is non rival: one person listening to a station does not make the signal weaker. But what about micro/nano scale: does tuning a receiver to a station consume the signal in any way? I understand about the signal being absorbed by physical barriers, but does this increase if we choose to consume the signal?

submitted by /u/nongaussian
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What are specific impulse and thrust in rocket engines, and how does the relationship between the two affect rocket performance?

Posted: 06 Oct 2017 02:45 PM PDT

I'm not entirely sure about the different between a rocket engine's specific impulse and its thrust. But more importantly, I want to understand how these two parameters affect the performance of a rocket. How and why is a rocket with high specific impulse and low thrust different from a rocket wit low specific impulse and high thrust (but equal power?)

submitted by /u/Tiger3546
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Why is Xenon banned in sport?

Posted: 05 Oct 2017 07:27 AM PDT

Recently I saw an article dating 2014 saying that WADA had banned the use of Xenon and Argon then I saw a 2017 article saying there's still no test for either of them from what I've read athletes, mainly long distance runners and cyclists inhale the gas and it enhances their performance but how? My understanding is that both are inert/noble gases which means they are unreactive so how do they enhance performance

Edit: Thanks for all the replys I have a good understanding of it now

submitted by /u/big_guy_124
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Could the ITER be used to manufacture lithium?

Posted: 07 Oct 2017 02:47 AM PDT

As we know, lithium ion batteries have become indispensable to modern life. I recently saw a documentary which featured a guy who had invented a new type of battery - the electrolyte was plastic, so it was much safer than lithium ion, and he could therefore use solid lithium as one of the electrodes, so it also had a much higher energy density. It seemed to be all improvements with no drawbacks, except one (not brought up by the presenter) - if they became popular it would massively increase world lithium consumption, which is already straining production. So I thought - lithium is the third element on the periodic table, it may be a common fusion product. The biggest fusion project currently underway is ITER in France - this is an experimental device and not intended for power production. But could it just be used to churn out lithium instead?

submitted by /u/dubitobot
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You are constantly very very close to biting your own tongue. Why doesn’t it happen more often?

Posted: 06 Oct 2017 06:33 AM PDT

Can a material be thermally conductive but not electrically conductive?

Posted: 06 Oct 2017 06:19 PM PDT

Even theoretically, if not physically.

submitted by /u/EvilVargon
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If someone is born with only one arm or hand is it possible to be dominant with their missing arm/hand?

Posted: 06 Oct 2017 01:04 PM PDT

For example if someone is born without a right hand, would it be possible that they are actually right hand dominant?

submitted by /u/trifoo
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Do animals recognise themselves in a mirror or a photograph?

Posted: 06 Oct 2017 09:32 AM PDT

When food particles get stuck between our teeth, what causes the surrounding gum to swell up and become tender ?

Posted: 06 Oct 2017 11:15 AM PDT

Can someone explain "resonance continuum"?

Posted: 06 Oct 2017 09:40 AM PDT

Taken from the ACS Organometallics Vol 28

In the Introduction, it discusses the "resonance continuum".

"Just as there is inconsistency in the ways that metal−NHC bonds are drawn in the literature, representation of the metal−NHP interaction has proven problematic (see Chart 2 for the ways that group 9 and 10 metal complexes have been drawn, and Chart 4 for various generic representations). Although a range of descriptions is warranted on the basis of differences in structure and reactivity, and therefore a universally applicable drawing is impossible, historical representation of the metal−NHP interaction appears to be complicated by the ligand's carbene-like nature, formal positive charge, dual bonding modes, and capacity for strong π-back-bonding. The representations in Chart 4 may be considered to be on the same "resonance continuum", sometimes by deconvolution of the dative bond, D→A, to its charge-separated, valence bond representation, D+−A−,(40) but these diagrams have different chemical meanings and should have significant implications in interpreting and predicting the structures and reactivity of the NHP complexes they represent. For example, it should be possible to substitute the phosphenium ligand in A, and B should contain a trigonal pyramidal phosphorus center with a lone pair (as in Chart 3), but it has been used in the literature to represent coordinated planar phospheniums."

Is the passage trying to state that the molecules are indeed resonance structures? Or is it that they aren't but just resemble each other when drawn in a 2D format?

submitted by /u/Krokod1l
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How long does it take the human body to replace lost blood? Is there any difference depending on how the blood was lost?

Posted: 06 Oct 2017 02:21 PM PDT

How does a ferromagnetic rod lose energy through hysteresis when in a magnetic field?

Posted: 06 Oct 2017 08:45 PM PDT

I understand that there will be a torque applied to the rod such that the magnetic energy is converted to mechanical energy. Although is this system losing energy in the form of mechanical energy from something simple such as friction with a material that is in contact with the rotating ferromagnetic rod? Or is there friction intrinsic in the ferromagnetic material due to different domains in the rod having domains with different directions of magnetization; thus domains are rotating in different directions (i.e. not necessarily parallel), and losing energy via heat/self-friction from its own domains even if the ferromagnetic rod was to be exposed to the magnetic field in a vacuum?

submitted by /u/CallMeDoc24
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Are there any known differences (other than color) between eye colors?

Posted: 06 Oct 2017 10:42 AM PDT

When we drink beverages dark in color (coffee, wine, dark beer, etc.), our pee still comes out clear/yellow. Where does all the pigment and dark color from the beverage go? Is it hard on our bodies to filter dark colored liquids?

Posted: 06 Oct 2017 08:52 AM PDT

What would orbital mechanics be like if gravity scaled with distance cubed? Or to the power of 7? Or any exponent other than 2?

Posted: 06 Oct 2017 09:02 AM PDT

Hi guys,

I play Space Engineers, which is an early access multiplayer sandbox-survival game. Also it's a space sim but barely - it simulates planetary gravity that decreases with distance7. How does this affect the trajectory of satellites that move around these planets? I know that the real distance2 gives (using the Newtonian model) conic sections for orbits, but how do things look when this exponent changes?

submitted by /u/MrMcGowan
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Since photons do not experience time themselves because they are going at the speed of light according to relativity. But since gravity pulls on light, thus slowing it down, does that mean all light experiences time?

Posted: 06 Oct 2017 12:38 PM PDT

One of the listed potential side effects of taking Klonopin (clonazepam) is respiratory infection. How does simply taking a medication cause a viral infection? (If this is the wrong place to ask this please kindly redirect).

Posted: 06 Oct 2017 08:35 AM PDT

Edit: not asking because I have any symptoms, just trying to understand the mechanism behind it, scientifically.

submitted by /u/EmeraldJaneWW
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Are reaction mechanisms very simplified? (Details in text.)

Posted: 06 Oct 2017 06:13 PM PDT

Do very commonly accepted (as in very commonly accepted by the scientific community to be highly likely to be what happens at the molecular level in the real reaction after enough ruling out of alternatives mechanisms by probability/impossibility and evidence towards the mechanism come up) reaction mechanisms, especially named, like Aldol Condensation, SN2, Fischer Esterification, SN1, Wittig, E2, Mannich, Aldol Addition, Michael, E1, etc. have some sort of large simplifications, as to comparing to what happens in the real life reaction at the molecular level, or are they essentially what is really happening at the molecular level in their corresponding reaction? This is mainly referring to what bonds are being broken and formed in the steps chronologically in the pathway, disregarding the reversibility, as that is just shuffling the pathway back and forth, partial and formal charges, intermediates and their structures, and major transition states. These "simplifications" don't count things like showing H+ instead of an acid itself or protonated solvent molecule like in reality, showing curved arrows for the movement of electrons instead of colliding/contacting orbitals/clouds of electron probability like in reality, the reversibility of steps in mechanisms, solvent affects, lines being used to represent bonds instead of overlapping orbitals like in reality, etc. as all these listed things and on can easily be inferred by the person looking at the mechanism or are even often shown/hinted at in the mechanism, like reversibility.

submitted by /u/Three-Oh-Eight
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Friday, October 6, 2017

Is it possible to create a normal-sized ice cube of Ice VI or Ice VII in the laboratory? And will it come out of the press as an ice cube that will take awhile to melt into regular ice or water?

Is it possible to create a normal-sized ice cube of Ice VI or Ice VII in the laboratory? And will it come out of the press as an ice cube that will take awhile to melt into regular ice or water?


Is it possible to create a normal-sized ice cube of Ice VI or Ice VII in the laboratory? And will it come out of the press as an ice cube that will take awhile to melt into regular ice or water?

Posted: 06 Oct 2017 01:37 AM PDT

What kind of press would you need to make an ice cube like this? The Hydraulic Press channel can't make small crystals of Ice VI with their equipment, can they?

I can't find much about this since the Roman numerals throw Google off and I just get results for regular ice.

submitted by /u/_Mr-Skeltal_
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When and what made humans realize that light speed isn't instant?

Posted: 05 Oct 2017 05:37 PM PDT

Do Cells That Make Up The Brain Get Replaced?

Posted: 05 Oct 2017 07:48 AM PDT

Skin cells die and get replaced with new ones continuously. Does a similar process happen for cells that make up the human brain?

submitted by /u/nicebyte
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Is it possible that there is a net charge in the universe?

Posted: 06 Oct 2017 01:50 AM PDT

I was thinking that since we have more matter than anti matter, maybe there is also a possibility that there is either more positive or negative charge than the other.

How easily would this be detectable?

submitted by /u/empire314
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Around Chernobyl its relatively safe in the open air for short periods, but very dangerous if you kick up dirt, pick vegetation, touch anything. How is this radiation stored?

Posted: 05 Oct 2017 04:56 PM PDT

I doubt a bunch of photons are bouncing around inside a leaf just waiting to be set free.

submitted by /u/Xaphoon
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When I unplug my charger from the wall socket why does the red light stay lit for a few seconds then fades? Would the loss of power not make it instantly dim?

Posted: 06 Oct 2017 06:54 AM PDT

In the search of exoplanets, why exactly are we searching for planets similar to earth in search for extra-terrestrial life?

Posted: 06 Oct 2017 06:04 AM PDT

To be more specific, why is there an emphasis on searching for a earth-sized exoplanet orbiting a star with similar mass/size/thermal output(?) to our Sun? Wouldn't searching for other things that could signify the possibility of life such as water, oxygen, or carbon be more effective? Searching for something similar to earth a bajillion light years away seems an odd condition to take into account.

submitted by /u/IamWongg
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How are radioactive materials formed?

Posted: 06 Oct 2017 06:00 AM PDT

Where do they come from, and what conditions need to be met?

submitted by /u/MaximusElectissimus
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[Physics] If 2 electrons collide, they may release a photon. Where does that energy come from?

Posted: 05 Oct 2017 04:00 PM PDT

Full disclosure: I know nothing, Jon Snow. If this question is nonsensical or too ambiguous, please let me know.

I am currently reading "Hidden in Plain Sight". In one of its chapters, the author mentions that when 2 electrons collide, there is a chance that a photon is radiated.

Now, as I understand it, energy cannot be created or destroyed. Photons most certainly contain energy -- so in this case, where does the energy (expressed "in" the photon) come from?

My train of thought is as follows:

  • Did the electrons lose mass...?

  • Did the electrons lose some "kinetic energy"? (Aren't they always moving at lightspeed though?)

  • Did the electrons lose temperature? (Do electrons even have temperature?)

What am I missing?

Thanks in advance.

submitted by /u/Gooseheaded
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Why is Cherenkov radiation constant but a sonic boom is not?

Posted: 06 Oct 2017 01:31 AM PDT

I read that they work the same way, but why does a sonic boom only produce one loud boom when Cherenkov radiation create a constant blue glow? Is it just because in Cherenkov radiation the 'boom' just happens over and over again?

submitted by /u/obafgkmbutt
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Why is our galaxy relatively flat rather than a big cloud of stuff?

Posted: 05 Oct 2017 02:11 PM PDT

Is there a biological/observable difference in the brain of a person with a 'photographic' memory? If so, how is it different from 'normal' brains?

Posted: 05 Oct 2017 08:02 AM PDT

Is gravity based on the size of an object? Or the mass/density of the object?

Posted: 05 Oct 2017 07:07 PM PDT

https://youtu.be/zHdJwBrT3WA?t=365

In the video above, its explained that object, when condensed (in this case, a star, example is a potato chip bag), creates a stronger gravitational pull when it is condensed. Is this true? I was always under the impression that its the size of the object that creates the gravity, not the mass/density of the object. Can someone help me understand?

submitted by /u/FUCKJ0HN
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On a phase diagram, is there vapor pressure at pressures and temperatures not on the coexistence curve?

Posted: 05 Oct 2017 06:25 PM PDT

On a phase diagram, I've learned that the coexistence curve at a phase boundary is where the chemical potential of the two phases are equal. This leads to the Clausius-Clayperon equation, which can be used to estimate vapor pressure at various temperatures.

But say I was on the coexistence curve between liquid and vapor, and I increased the pressure (or decreased the temperature). I should now be solidly in the liquid region of the phase diagram, where the chemical potential of the liquid phase is lowest. Does that mean liquid is the only phase present? I've been told that vapor pressure exists for any liquid under any conditions.

If there is vapor pressure despite the higher pressure, then aren't the two phases coexisting? Then why is the phase boundary called the "coexistence curve"?

Thanks!

submitted by /u/not_zod_grodd
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What happens to water when it becomes extremely compressed?

Posted: 05 Oct 2017 11:55 AM PDT

Google was no help since I couldn't find a video on it.

Im thinking of a hydraulic press pressing into a large, metal cup of water, where water can't escape from, what will happen to it?

[Apologies if this is the wrong tag, I made a guess between physics and Earth sciences]

submitted by /u/-Sag
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Is crystallography a dead field?

Posted: 05 Oct 2017 11:17 AM PDT

With the rise of cryo-electron microscopy, is crystallography becoming redundant as a technique?

submitted by /u/junkProduct
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How do computer screens show color?

Posted: 05 Oct 2017 06:02 PM PDT

So from my understanding, computer screens actually use green, red and blue to display the color they do by activating our cones. I thought they flashed really fast so it kinda tricked our eyes. However my AP psychology teacher said it actually shows a color because of how condensed the pixels are so you can't actually see the individual colors.. So which one is actually correct? And if my teacher was correct wouldn't that mean you can't actually display a color on a single pixel? Sorry if this sounds stupid

submitted by /u/jacobdu215
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Is molten metal still electrically conductive?

Posted: 05 Oct 2017 09:40 AM PDT

Is molten metal still electrically conductive?

submitted by /u/BariumSodiumNa
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If you shine a white light through a blue filter, does it actually change the wavelength of the color?

Posted: 05 Oct 2017 11:37 AM PDT

As in, could you use plain old colored plastic filters to shift the color of a white or daylight LED light to wavelengths more friendly to plant growth?

submitted by /u/OtisB
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[Engineering/Physics] How do thermonuclear warheads get decommissioned, without anything blowing up?

Posted: 05 Oct 2017 11:33 AM PDT

If it were opened by cutting action, wouldn't that trigger the conventional explosives inside (and the nuclear explosion too)?

submitted by /u/RatherCynical
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How do fission and fusion both release energy?

Posted: 05 Oct 2017 09:23 AM PDT

Surely they're inverse operations? One should release and one should absorb?

submitted by /u/Joey936
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Thursday, October 5, 2017

How exactly do DNA testing kits determine ancestry/ethnicities?

How exactly do DNA testing kits determine ancestry/ethnicities?


How exactly do DNA testing kits determine ancestry/ethnicities?

Posted: 04 Oct 2017 05:18 PM PDT

There are plenty of viral videos featuring people spitting into a tube and later getting their results. You can buy these types of tests at chain stores and pharmacies. These types of tests are even being advertised on TV! Wow! Would someone explain the science behind them? I want to know if these are accurate or if they're a hoax. Additionally, does the testing for these kits work the same way that other DNA testing works (like those used by detectives to identify a criminal)?

submitted by /u/browniebrittle44
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Can you freeze gasoline and if so for how long and can it still be used once thawed?

Posted: 04 Oct 2017 08:19 PM PDT

Will a 250 mAh power source charge a 3,000 mAh battery in 12 hours?

Posted: 04 Oct 2017 07:53 PM PDT

This may be a stupid question, but I don't know a lot about this kind of stuff and want to learn. Let's say I have a 5 volt, 250 mAh power supply... does that mean it would take about 12 hours to charge a 3.7V, 3,000 mAh lithium-ion battery? Does voltage matter with charging speed? Or does it just have to be equal or slightly higher than the voltage of the battery being charged? I believe only current affects charging speed but if I knew for sure than well... I wouldn't be here! Thank you in advance.

submitted by /u/jonnylee989
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Does distribution of mass influence gravity?

Posted: 05 Oct 2017 04:30 AM PDT

Say, for example, Earth's polar ice caps melted and redistributed the water trapped in them across the oceans, raising the average sea level by X. Would the gravitational pull at a given elevation increase compared to what it was before?

submitted by /u/macthebearded
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Does the Higgs boson count as “matter” and does it have an antimatter counterpart?

Posted: 05 Oct 2017 03:00 AM PDT

If not, how does the nature of the Higgs boson relate to the nature of matter and antimatter?

submitted by /u/Timwi
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How do LaGrange points work in Highly Elliptical Orbits?

Posted: 04 Oct 2017 12:35 PM PDT

So I'm doing research on LaGrange points and most diagrams depict a planet orbiting a star in a mostly circular manner. I'm confused as to how the points would work if the orbit happens to be more elliptical, since the distance from m1 to m2 would change

submitted by /u/MrBandit0
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Is it possible to convert heat to electricity without going through the boiling water->turbine process?

Posted: 04 Oct 2017 03:40 PM PDT

Example when a nuclear reactor heats up, can that heat be converted to electricity without water->steam->Turbine? If so how does that work?

submitted by /u/arvindg87
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How are some fish able to survive in the colder waters (ie the arctic) even though they are cold blooded?

Posted: 04 Oct 2017 03:29 PM PDT

What are these deep grooves in the Eastern Pacific Ocean's floor?

Posted: 04 Oct 2017 07:47 AM PDT

I was browsing the NOAA Global Data Viewing tool, and selected the option to view the depth of the ocean floors. When I did, I noticed these horizontal grooves in the Eastern Pacific Ocean floor.

Looking at the data, these grooves are points where the depth suddenly drops. For example, at -143.45947 Lon, 31.56494 Lat, the ocean depth is 6,127 meters. However, just a touch north, at 31.87256 Lat, the ocean depth is only 5,249 meters, around what appears to be average for the area.

Is this an error in how the data is presented? Is this just physical crinkling caused by faults? If so, which ones? Why are the grooves spaced so regularly? What's going to happen to the grooves as time goes on--is anything interesting happening down there?

Thank you in advance.

submitted by /u/Whazzits
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How does one country export usable electricity to another country? especially at great distances?

Posted: 04 Oct 2017 02:50 PM PDT

If a country has generated electricity to excess and wants to sell it what is the scientific (or technical) method that this is accomplished? Especially over oceans, mountains across different continents?

Are there any other challenges or obstacles with this task?

I would appreciate any other interesting facts about global electricity or energy trade (especially having to do with renewable sources)

submitted by /u/15MOG
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How do SpaceX's 1st stage boosters not 'choke' on incoming air during re-entry burns/landings?

Posted: 04 Oct 2017 03:29 PM PDT

This is a question I've had for a long time, but never really asked. From what I've heard, SpaceX boosters re-enter the atmosphere during landings and perform 'suicide burns' to be fuel efficient. But at least to me, that raises the question of how the engines are able to operate properly with all that high speed air ramming itself up into the engine nozzle. Are there any answers to this? Another related question would be how are the engines constantly able to draw fuel? With liquid fuel rockets, wouldn't accessing fuel during different stages of flight (up, 0g, down) represent a significant problem, especially as more and more fuel is spent? Thanks in advance!

submitted by /u/TheAero1221
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Why does putting your fingers down your throat make you gag, but eating doesn't?

Posted: 04 Oct 2017 05:11 AM PDT

Technically, do coloured solutions still have colour if no light is shone on them?

Posted: 04 Oct 2017 07:45 PM PDT

From what I understand, the colour of solutions such as copper (II) sulfate comes from electrons being excited by the light energy and then returning to a more stable state, releasing that energy in the form of visible light. If there are no photons hitting a solution of said solution, technically there would be no colour, correct?

EDIT: I think I get it now. thanks everyone! !

submitted by /u/Shadowciaw
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If a giant meteor crashed into Earth and destroyed the dinosaurs, why isn't there a crater? Has it just eroded/filled in? Or is it here, just not widely known?

Posted: 04 Oct 2017 11:50 AM PDT

For some reason, although I see a number indicating replies, I can't actually see anything! It just has the "whole lot of empty" message. Even notifications disappear from the Notifications List!

submitted by /u/Sweet_Taurus0728
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Do raccoons actually wash their food? If yes, why?

Posted: 04 Oct 2017 08:44 AM PDT

If some water droplets land on my touchscreen phone, it acts as if I touched the screen. How? Why?

Posted: 04 Oct 2017 08:31 AM PDT

How do trams switch the rail when they run on the road?

Posted: 04 Oct 2017 07:22 AM PDT

For trains, or when they run on dedicated tracks, it's really easy, but how do they switch the track when they run on the road?

submitted by /u/Thammarith
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Could we just blow up a nuclear reactor in meltdown with a nuclear bomb ?

Posted: 04 Oct 2017 02:39 PM PDT

As I was reading another Askscience comment about meltdown in fission reactors, I just thought as a joke: "why not just nuke it and be done with it".
But then I thought, outside of the craziness and unpredictability of it : If you were to detonate a nuclear bomb next to a reactor which is undergoing a meltdown, would you just spread the uranium of the reactor around (as uranium and other isotopes), or would the influx of neutron from the bomb activate the uranium and contribute to the runaway fission and "burn up" releasing more energy in the bomb reaction ?
I'm sure if it was simple it would have been tried already with Fukushima or Tchernobyl, but I would like to understand what would happen exactly.

EDIT: The "idea" would be to burn the nuclear fuel from the powerplant. You can live in Hiroshima because most of the fuel is spent in the nuclear explosion and the area was safe-ish relatively fast, while you can't live in Fukushima / Tchernobyl because the fuel degrades in many isotopes and spreads everywhere.

submitted by /u/the_geth
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