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If you were to have a solenoid (0 current) floating still in space, and shot a magnet through it, would the solenoid move, or would it only create a DC...
Asked on 02/13/2021
3 answerI'm studying special relativity. A general Lorentz transformation is defined by $Lambda^TetaLambda=eta$. Now,begin{align}eta'^{munu} &= Lambda^mu_{;;alpha}Lambda^nu_{;;beta}eta^{alphabeta}&= (LambdaetaLambda^T)^{munu}end{align} How does this equal $eta^{munu}$? All we...
Asked on 02/13/2021
3 answerWhat is the technique to measure the spectrum of an electric field (in empty space) between 1Hz and 10kHz? Is there some kind of antenna which can be connected to...
Asked on 02/13/2021 by Matthiasho
0 answerI have been trying to understand how to compute the following loop diagram in $frac{lambda}{3!}phi^3$ theory, with $mneq0$ and I am not getting anywhere. From what I understood...
Asked on 02/13/2021 by Gnomes1
1 answerSince the Kelvins are a temperature unit and temperature is basically molecule/atoms excitation (so they have a "speed of excitation"), could it be possible to measure a speed (let's say...
Asked on 02/13/2021 by N. auf Kappa
1 answerWhy are infrared images not great?Simply googling infrared images, and looking at pictures of things like streets, people, animals, etc. . . I can't quite pin down why infrared...
Asked on 02/13/2021
3 answerThe current in forward bias is claimed to be because of the diffusion process.However, from what I understand, the diffusion process is being supported by the battery by inducing...
Asked on 02/13/2021 by Ekdeep Singh Lubana
1 answerSuppose I place a lighter on a wooden table, the lighter has a weight, so it wants to go down, but the table exerts a normal force on it, preventing...
Asked on 02/13/2021
2 answerI was trying to apply Chasles' theorem to the question attached below. To study the Dynamics I need to apply Chasles' theorem to convert the motion into a combination of...
Asked on 02/12/2021 by Shikhar Chamoli
2 answerWhen you observe or measure a process in classical physics it almost never really alters the experiment. For example, if you have an Carnot engine and measure the volume and...
Asked on 02/12/2021
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