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Is there any 1st order electromagnetic Feynman diagram? I.e. a process whose probability is just $propto alpha_{EM}$? If not, is there any physical reason why? We always need at least...
Asked on 07/17/2021
2 answerSo here is the condition. There are 3 charged particles, all three of them have the same charge, but they have different masses and all of them are moving with...
Asked on 07/17/2021 by Rahul Maurya
3 answerComplete noob here. I'm reading a book called "The Beginning of Infinity" by David Deutsch, and he describes an experiment in which two identical universes in multiverse suddenly become different....
Asked on 07/17/2021 by iiskakov
0 answerMy system is a bunch of charged particles in a 1 dimensional harmonic potential. This is a computer simulation, and what I get is a list of the positions and...
Asked on 07/17/2021
2 answerLet's say that a three dimensional object with continuous mass distribution is undergoing rotational motion about an axis that lies on the centre of mass. The translational velocity of the...
Asked on 07/17/2021
3 answerDoes the moment of inertia of a disc with some masses attached at the rim be the same as one without the attached masses?Or is it necessary to use...
Asked on 07/17/2021 by user34304
1 answerTerribly naive question, I know. Obviously, not simply "disappearing", but if it could, theoretically, be absorbed or "used" somehow, what would happen to the universe? Would it stop expanding, would...
Asked on 07/17/2021 by Tamale Fox
1 answerI'm slightly confused at how/why the viscous sublayer forms in a turbulent boundary layer. From what I understand, the boundary layer is a region where there is momentum transport through...
Asked on 07/17/2021
0 answerGiven length invariance in Euclidean 3D space between two inertial frames:$$ds^2=ds'^2$$Can Galilean transformation be derived like Lorentz transformation derived from space-time interval invariance?...
Asked on 07/17/2021 by rioiong
2 answerI want to prove that the magnetic field inside a cylindrical cavity in a long, cylindrical conductor carrying uniformly distributed current i and having radius R is uniform. The radius...
Asked on 07/16/2021 by user432
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