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I need to be able to get a compass needle (a magnet) to be affected (i.e., moved) by another magnet ("magnetically coupled"). These magnets are on opposing sides of a...
Asked on 11/27/2020 by Armadillo
0 answerI consider two cases of a confined aquifer and want to calculate the pressure / hydraulic head in a...
Asked on 11/26/2020 by Sebastian Beyer
3 answerWe know that the lagrangian $mathcal{L}(q,dot{q},t)$ which is function of generalized co-ordinate, generalized velocity and time. We consider the dynamics of particle is in configuration space. But As we...
Asked on 11/26/2020 by Young Kindaichi
3 answerMy confusion stems from the following exercise: I've written sloppily: "Why are charges not induced on at least that portion of...
Asked on 11/26/2020 by sangstar
2 answerEvery particle in the universe is moving in spacetime: a massive "still" one (in the 3D sense) is moving in a purely timelike direction, a massive "moving" one in a...
Asked on 11/26/2020
2 answerI’m currently studying quantum mechanics from Introduction to Quantum Mechanics by Griffiths. In his free particle section, he says that the speed of a particle is the coefficient of ...
Asked on 11/26/2020 by Teethandfur YT
1 answerIn Zee's Quantum Field Theory in a nutshell, he discusses the quantity $W(J)$, where $$left<0middle| e^{-iHT} middle|0right> = e^{-iET} = Ce^{iW(J)}$$ and for a free theory with a...
Asked on 11/26/2020 by Tabin
1 answerI am unable to find images of pure crystalline graphite with high confidence, but based on various sources I believe that it should actually be both black and shiny, in...
Asked on 11/26/2020 by user21820
1 answerA rectangular wire loop of height h and width w, centered on the origin, carries current I in the direction shown in the figure. The angle between the positive x-axis...
Asked on 11/26/2020 by Rohan Khanna
2 answer$D_{z}$ is the electric-dipole operator. How to determine the quantum numbers of the bra for that the matrix elements are not null$$left<J',M';pi'middle|D_{z}middle|frac{3}{2},frac{1}{2};pi=-1right>$$where $pi$ is the...
Asked on 11/26/2020 by Fisjog
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