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HNQ
1:05 AM
1
Q: Does energy exist on its own?

Ed_GravySo to my understanding as a layman is that energy transfers from one material to another (I guess that's why there's potential and kinetic energy), for example photons to solar panels. Now my question is let's say you have no material in the universe where will all the energy go? I mean will it e...

 
 
8 hours later…
HNQ
8:39 AM
1
Q: Is sound really adiabatic because it is a fast process?

MichaelWIn many books I have consumed so far there is the statement that sound is adiabatic because heat transfer does not have nearly enough time to reach isothermal equilibrium. Doesn't this contradict meteorological processes, which are very very slow as compared to sound and yet adiabatic to a very g...

 
 
8 hours later…
HNQ
4:13 PM
3
Q: The synchronized clocks on earth's surface: at which observer's rate are they beating?

pglpmFrom what I understand, the time rates (I'm not speaking about absolute times) of all clocks on earth's surface are synchronized. This means that, say, a mobile phone's clock is generally not beating the mobile phone's proper time – any synchronization would be out as soon as we swing the phone a...

 
 
3 hours later…
HNQ
6:52 PM
3
Q: Why expansion of real gases lead to cooling?

ShinnaaanPaul Hewitt writes in his book Expansion of real gases lead to cooling as average translational kinetic energy per molecule decreases. The reason given is: During Expansion molecules collide with more receding molecules than with approaching so that net work done on a molecule is negative due ...

 

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