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I read this news about a Jupiter sized planet orbiting a white dwarf. It is still puzzling to the scientists that how it remained as a ...
Asked on 11/03/2020
1 answerMy understanding is this: angular momentum of a body about a point cannot be in two directions at once, which is why a wheel already rotating about its axle, cannot...
Asked on 11/03/2020 by dnaik
2 answerLet there be a situation where a force 'F' is acting on one end of an in extensible string which is connected to a box named 'A' resting on a...
Asked on 11/03/2020 by Aditya Bharadwaj
2 answerI have been told that two fermions make a boson, which I am trying to prove. Suppose we have two fermion annihilation operators $c_1$ and $c_2$ such that...
Asked on 11/03/2020
2 answerLet's start with a single particle Hilbert space $H$ with basis ${|alpharangle}$, where $alpha$ represents a complete set of quantum numbers. If we now take two particles...
Asked on 11/03/2020 by Mr. Mister
1 answerI am struggling with this magnetic circuit.Magnetic circuit of a coil with moving part What is the equivalent cross section area I need to use to...
Asked on 11/02/2020 by user1022959
1 answerIn Schwarz's QFT he introduces in chapter 27 the Spin-Helicity formalism as a way of calculating gluon-gluon interactions much easier than going through all the Feynman calculus from the beginning...
Asked on 11/02/2020
1 answerWe see an object when light from a source strikes the object and then reaches our eyes. How does light, which is an electromagnetic wave, gets encoded with the information...
Asked on 11/02/2020 by schizoid_man
11 answerIf there were an interstellar spacecraft being propelled by gamma rays from electron/positron annihilation, they say it would get harder to keep accelerating it the closer it got to the...
Asked on 11/02/2020 by Robert Kirkman
2 answerI’m trying to delve into lagrangian mechanics, mainly because i want to have a deeper understand of things lik Noether’s theorem. What i don’t fully understand is what the...
Asked on 11/02/2020
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