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HNQ
3:36 AM
2
Q: Why proper time is a measure of space?

Álvaro RodrigoRecently I've been trying to learn General and Special Relativity by myself. There is an specific thing I do not understand perfectly, proper time in the metric of the space-time. Take the case of an empty space-time: $$-c^2 \mathrm d \tau^2 = -c^2 \mathrm d t^2 + \mathrm d x^2 + \mathrm d y^2 +...

 
 
1 hour later…
HNQ
4:50 AM
3
Q: Average value of energy in statistical mechanics

Feynman_00I haven't taken any classes in Statistical Mechanics, but in studying Structure of Matter I found some ideas I'm not very familiar with, related with the average value of energy ($E$). Given a $p(E)$ probability density, the average energy is: \begin{equation} \langle E\rangle=\frac{\int\limits_0...

 
 
8 hours later…
HNQ
12:41 PM
3
Q: How are frames of references compatible with quantum mechanics?

Egg ManThe idea of changing the frame of reference is that you want to switch to the point of view of an object that is located at a well-defined position and moving with a well-defined velocity relative to you. However, quantum mechanics says that no object, including humans observers, can have a well-...

 

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