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I am having trouble unpacking the following argument from page 72 of Goldstein's classical mechanics book.We now restrict ourselves to conservative central forces, where the potential is V(r), a function...
Asked on 11/16/2021
1 answerIn SR, there are a couple of paradoxes such as the bug-rivet paradox that require us to take into account a finite speed of impulse. Suppose I...
Asked on 11/16/2021
1 answerI would like to know if there is any way that I could make mercury or another liquid metal be attracted or repelled by magnets. Absolutely any solution would be...
Asked on 11/14/2021
5 answerI was wondering, if a person climbs a tower and shouts at the top of his lungs how much distance would the sound travel ? Would it reach someone 1km...
Asked on 11/14/2021 by user184836
4 answerIn the book Molecular Physics by Demtroder there is an explanation of the Born-Oppenheimer approximation and the adiabatic approximation in terms of a perturbative series. The Hamiltonian is $H_0...
Asked on 11/14/2021 by user110503
1 answerI was looking for an incoherent monochromatic collimated light source. I know that if I shine a laser through some medium I'll partially lose the coherence but I will also...
Asked on 11/14/2021
2 answerReading about the SYK model I encounter a trick that should help to calculate the thermal entropy of the system. I am not able to understand what they are doing...
Asked on 11/14/2021
1 answerIn a photon BEC, people are talking that cavity consisting of $2$ highly reflective mirrors make the photon gas $2$ dimensional by freezing out one wavevector $k_z$,...
Asked on 11/14/2021
1 answerI'm reading Weinberg's paper on "Dynamics at Infinite Momentum" in which he proves a claim about the type of Feynman diagram that contributes finitely to the perturbation series and the...
Asked on 11/14/2021
0 answerThe way I see it:Assuming space is a perfect vacuum, a satellite should stay in circular orbit with CONSTANT RADIUS around earth forever but I think the radius should...
Asked on 11/14/2021
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