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I am having trouble understanding the term. How come that calculating the integral of the product of multiplying the Area differential by (distance)^2 determines the stiffness of the beam or...
Asked on 03/06/2021 by muhzi
1 answerIn quantum mechanics why do we need the operators to be linear or at best, antilinear?...
Asked on 03/06/2021
0 answerIs there any quick way of proving that for a conformal metric of the form: $g^{}_{munu}=Omega^2eta^{}_{munu}$ where the $eta^{}_{munu}$ is the usual Minkowski metric, the Weyl tensor vanishes...
Asked on 03/06/2021
1 answerFor the Weyl scalars of all spacetimes, at any point, possess one special structure, the so called principal null directions. Consider a general null tetrad ${ l_a,n_a,m_a,overline{m}_a }$, we would...
Asked on 03/06/2021 by ivan44
1 answerTorque is analog of force in rotational motion and it has one of two directions I.e clockwise and counterclockwise . How I can visualise these directions . For example r...
Asked on 03/06/2021 by Abdul Wajid Lakhani
2 answerA commonplace empirical observation is that when a microwave oven stops, unpopped kernels are very hot (it's physically painful to touch them) and popped kernels are not. Is there an...
Asked on 03/06/2021
3 answerIn Shankar's quantum mechanics book he says the spin of electron doesn't change the energy levels of hydrogen atom(page 397, 2nd edition). How doesn't spin(being a form of angular momentum)...
Asked on 03/06/2021 by Ben Stark
2 answerIn general, if a wave carries energy density $u$ with velocity $v$, it also carries momentum density $u/v$. I've seen this explicitly shown for electromagnetic waves and...
Asked on 03/06/2021
4 answerLet's have a long closed loop wire, part of which is a coil to increase locally the inductance. A magnet is moved back and forth inside the coil. A clamp...
Asked on 03/06/2021
1 answerWhat is the physical interpretation (if there any) of angular displacement as a vector? I personally used the right hand palm or screw rule to find out the direction but...
Asked on 03/06/2021
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