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Starting with the equation for Lorentz contraction $L = sqrt{1-(v/c)^2}L'$ and making the substitution $v=at$ (be sure to see a better substitution two paragraphs down) then taking the...
Asked on 11/27/2020 by Pat Dolan
4 answerLet's say I've got 2 different fields $a, b$ and I want to compute its covariant derivative $D_mu = partial_mu + iA_mu^a T^a$ where ${A_mu^a}$ is the...
Asked on 11/27/2020
1 answerIn a previous physics class, I learned that the electric flux was $vec{E}cdotvec{A}$ (dot product), and hence the unit is $Nm^2/C$. But in my electromagnetics book, it says the unit...
Asked on 11/27/2020
1 answerI've just been reading about tachyons and tachyonic fields, and although they probably don't exist/are wildly unstable, I'm curious: What does imaginary mass do to spacetime curvature? Does ‘complex valued...
Asked on 11/27/2020 by BenRW
1 answerHow do you model the magnetic moment that's induced by an external magnetic field? So basically if you have an external B field, and we put a ferromagnetic rod in...
Asked on 11/27/2020 by E. Morell
2 answerthere are many topics on the web (for instance this, or this famous lecture) about this topic, but I do not understand some basic...
Asked on 11/27/2020
1 answerCan somebody prove the rotation of Earth if it places an uniform disk with a hole in its the center on an axis and orient it paralelly to Sun ecliptical...
Asked on 11/27/2020
2 answerIs it true that things that are hard, such as diamonds, wear out more slowly? Does abrasion depend on the hardness of the material? If so, why can diamonds in...
Asked on 11/27/2020 by patricoo
1 answerI used to think of them as separate independent rules. But after making the Why do we have to revise the definitions of momentum and force in special relativity?...
Asked on 11/27/2020
2 answerLifting of degeneracies of a composite system through interactions among its constituents is a generic theme of all physical systems - from splitting of $s-$orbital energies when two hydrogen...
Asked on 11/27/2020 by Emroz Khan
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