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BackgroundStephen Gull wrote this in his webpage"Many years ago (about 1984), I used to give a Mathematical Physics course to the Part...
Asked on 02/06/2021 by Eran Medan
1 answerI'm reading Arnold's mathematical methods of classical mechanics and in the section he talks about newton's equation ($ddot{boldsymbol{x}}=boldsymbol{F}(boldsymbol{x}, boldsymbol{dot{x}},t)$) he says that this is invariant under Galilean transformations.Right,...
Asked on 02/06/2021
1 answerYou know how phones, computers and other electronic devices that use wireless communication use radio waves to communicate?...well since almost everyone has gotten a smart phone wouldn't radio waves from...
Asked on 02/06/2021
4 answerThe conservation momentum can be derived from the total electromagnetic force on the charges in volume $V$ and is written in this way: $$ frac{dvec{p}_{mech}}{dt} + frac{d}{dt} int_V...
Asked on 02/06/2021 by PCat27
2 answerWork done by conservative forces changes one form of mechanical energy into another. Is it correct to assume that work done by non-conservative forces changes one form of energy to...
Asked on 02/06/2021
2 answerIn Forced oscillations, resonant frequency is the frequency at which amplitude is maximum. So what do resonant frequencies mean in coupled oscillators (since they are not corresponding to maximum amplitude)?...
Asked on 02/06/2021
0 answerI am reading the paper "ABC of instantons" and meet some problems at section 8. I simplify this problem a little bit as follows. First, we have a Euclidean path...
Asked on 02/06/2021
1 answerIn the literature I have seen the following definition of an inertial frame: A frame is called inertial if any material point interacting with no other bodies or fields moves...
Asked on 02/06/2021 by MKO
1 answerThe question arises from here. People wants to define kinetic energy and potential energy from EM tensor. My question: How to define kinetic energy and potential energy from EM...
Asked on 02/06/2021
0 answerI don't know much about physics but I have a question.Let's say you were lost in a completely flat desert, with seemingly nothing else surrounding it, and you screamed...
Asked on 02/06/2021 by namonami
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