Find answers to your questions about Physics or help others by answering their Physics questions.
The orbital angular momentum operator is given by$$L_i=epsilon_{ijk}x_j p_k$$where $x$ and $p$ are the position and momentum operators. In the Dirac equation, the hamiltonian operator...
Asked on 08/16/2021
1 answerCould a set of electromagnets be arranged in a Halbach array? If so, what would happen if only half were turned on? And if polarity were reversed?...
Asked on 08/16/2021
0 answerRecently I've been reading up a bit on inflation and the subsequent reheating of the early universe. What has left me a bit confused, however, is that in all of...
Asked on 08/16/2021
1 answerThis is a follow-up to the question: About the physical, measurable coupling constants, after renormalization In QFT, we have the bare mass, renormalized mass, physical mass (which corresponds to...
Asked on 08/16/2021
1 answerWhat is the d'Alembertian of the Ricci tensor $square R_{munu}$? I know that for a scalar $square := g^{munu} nabla_mu nabla_nu$ and I can use the fact that...
Asked on 08/16/2021 by cookieDestroyer
0 answerThis sounds like a stupid question but I am do not grasp physics concepts easily. "Velocity" is just the change in displacement over the change in time. I can see...
Asked on 08/16/2021 by SHOCK
9 answerIn terms of Feynman diagrams, what are extrinsic and intrinsic flavour production? See for example this paper this paper (p.2)....
Asked on 08/16/2021
0 answerI need to find the quadrupole expression from the dipole expression. I know that the dipole expression is$$V(vec{r}) = frac{1}{4piepsilon_0}frac{vec{p}cdot (vec{r} - vec{r}^prime)}{|vec{r} - vec{r}^prime|^3} $$ Now, I...
Asked on 08/16/2021
0 answerWhen I google skin depth, I get the following definition,Skin effect is the tendency of an alternating electric current (AC) to become distributed within a conductor such that...
Asked on 08/16/2021 by Aravindh Vasu
2 answerHello I'm trying to use Maxwell's Equations to calculate the electromagnetic fields around different charge/current situations like from a charge using $nabla cdot E = frac{rho}{epsilon_0}$ to obtain Coulomb's...
Asked on 08/16/2021 by Xertz
1 answerGet help from others!
Recent Questions
Recent Answers
© 2024 TransWikia.com. All rights reserved. Sites we Love: PCI Database, UKBizDB, Menu Kuliner, Sharing RPP