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Because my previous question was short and confusing, it was put on hold. This is my new question, which getes straight to the point.I have an electromagnetic plane wave which...
Asked on 12/08/2020 by Phil_Charly
2 answerUsing solar panels, and the resulting electrical energy, could an electron gun provide a suitable level of renewable thrust, better than an Ion thruster? If it would even create thrust...
Asked on 12/08/2020 by Jameson Dennelly
2 answerThe Lorenz gauge is the only Lorentz invariant electrodynamic gauge. If the vector potential has physical meaning, as in the Aharonov–Bohm...
Asked on 12/08/2020
1 answerThis is with regards to problem 3.19 from Goldstein's Classical Mechanics,A particle moves in a force field described by the Yukowa potential $$ V(r) = -frac{k}{r} e^{-frac{r}{a}},$$ where...
Asked on 12/08/2020
1 answerThe rule for Einstein notation is that the same dummy index cannot be repeated twice. However suppose I want to compute Christoeffel symbols:$$Gamma^{alpha}_{betagamma} = frac{1}{2}g^{alphasigma}(partial_beta g_{gammasigma}+partial_{gamma}g_{sigmabeta}-partial_{sigma}g_{betagamma})$$...
Asked on 12/08/2020 by D. Soul
1 answerAre the geometric centre & centre of gravity of a right angled triangle at different coordinates ?...
Asked on 12/08/2020 by Zaid AAmir
3 answerWhile going through the derivation of how to calculate the pressure of an ideal gas we consider only the translation of molecules. Why don't we take into account that the...
Asked on 12/07/2020
2 answerI’m pouring this in my coffee cup My guess is that some is exiting not uniformly but viscosity is bringing it closer to the rest....
Asked on 12/07/2020
1 answerIn the 2-D projections of the shape of the universe shown here, we see that the flat universe and the spherical universe are perfectly symmetrical, so any triangle...
Asked on 12/07/2020 by kloddant
2 answerHere I am asking about electrons, but of course this same question applies to muons and all the other spin one half particles. I am aware that spin is defined...
Asked on 12/07/2020
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