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Why does a drone fly with respect to the air in a moving car/airplane, but not in an elevator as shown in this clip: What Happens If You...
Asked on 12/11/2020
7 answerI have seen several attempts at building a consistent quantum-classical theory, i.e., a theory where a quantum (sub) system interacts with a classical one somehow.Examples: (1) ...
Asked on 12/11/2020
0 answerLet's consider the so-called Master formula, which expresses the cross-section of interaction between two protons, taking into account the parton density function and the intrinsic cross-sections between two partons, for...
Asked on 12/11/2020
1 answerA perfectly inelastic collision is one where both of the colliding objects stick together and move as one. My questions is, why, of all possible combinations of final velocities that...
Asked on 12/11/2020
7 answergenerally we integrate out the heavy field/modes in effective field theory, however, I'm wondering why couldn't we integrate out the light field/modes instead. Actually i think it's reasonable from mathematics....
Asked on 12/11/2020 by feng lin
3 answerAccording to General Relativity I am being accelerated upwards by planet earth while writing this question. But a curious person on the the other side of the planet relative to...
Asked on 12/11/2020 by Megahyttel
7 answerAs shown in the figure, in the Meisner effect, the magnetic field of the magnet bypasses the superconductor. My question is, does the magnetic B field belonging to the magnet...
Asked on 12/11/2020 by dan li
1 answerI had an idea recently. But I don't have the physics knowledge to know if it makes sense or not. I've become a bit of a PC enthusiast lately and...
Asked on 12/11/2020 by tyler mackenzie
2 answerI have read this question: Why did the universe not collapse to a black hole shortly after the big bang? where Lubos Motl says:This matter has no center -...
Asked on 12/11/2020
2 answerOk, I'm not a physicist, so I don't know if my question is silly (probably yes), but there is something in special relativity that I can't understand and I would...
Asked on 12/10/2020 by Richard Gold
5 answerGet help from others!
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