Find answers to your questions about Physics or help others by answering their Physics questions.
A similar question has been put before in this forum, but not with full clarity. So I would like to revisit the question and express it differently, hoping for a...
Asked on 08/17/2020 by hobbyist72
0 answerClassically, the expansion of a gas in a container requires the gas to apply outward pressure to the walls of the container. Is it also true for the Universe during...
Asked on 08/17/2020
1 answerI have another question about the third law of Newton (if you can check the last one that I posted) : Why is it that the gravity that pushes...
Asked on 08/15/2020 by PhysicsMan
4 answerInitially, I saw Wick rotation as a useful trick to apply dimensional regularization, but then I learned about instantons and how they only exist in Euclidean Yang-Mills.Also, I heard...
Asked on 08/15/2020
1 answerFirst question on stackexchange. Hopefully somebody can help me out. I'm struggling to express the following eloquently. I have a rotating syringe tipped with a needle. rotation speed w,...
Asked on 08/15/2020 by Tom O'Haire
1 answerI've been reading about why voltage drop occurs and that electrical potential energy supplied to an electrical charge is lost after work is done, but my question is that after...
Asked on 08/15/2020 by TMax
1 answerHow the relation $nabla_{a} u^{a}=D_{a} u^{a}-epsilon v^{i} nabla_{i} v_{j} u^{j}$ where $D_{a}$ is covariant derivate on the hypersurface between 4-divergence and 3-divergence of the vector on the hypersurface...
Asked on 08/15/2020 by RandomXYZ
1 answerMy question is, can we diagonalize a general Hamiltonian ,$$H=-tsum_i^N (c_i^{dagger}c_{i+1}+h.c.)+sum_i mu_i c_i^{dagger}c_i$$ where,$$mu_i=begin{cases}mu_0, &text{if mod}(i,p)=00, &text{otherwise}.end{cases}$$ Obviously, $p$ is the periodicity...
Asked on 08/14/2020 by Roopayan Ghosh
1 answerIn the book 'OPTICS' by Eugene Hetch it is written that, "the optic axis is actually a direction and not merely a single line".I can't understand why it is...
Asked on 08/14/2020 by user257564
1 answerI want to model different 2D nano-structures, layered materials in 3D (animated version). Is there any open source where I can build these structures? ...
Asked on 08/14/2020 by ravi
0 answerGet help from others!
Recent Answers
Recent Questions
© 2024 TransWikia.com. All rights reserved. Sites we Love: PCI Database, UKBizDB, Menu Kuliner, Sharing RPP