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Is there a duality between (2+1)D gravity and Chern-Simons Theory? Or they merely have related features? If so, of which type and why?...
Asked on 07/18/2021 by Marco Tavora
2 answerWe know that normal force is electromagnetic in nature. Then why is normal force said to be a contact force?...
Asked on 07/18/2021 by Ayman Abdussalam
3 answerHow this toy works? As you roll the ball on the table, the eye always point up: (original video source: ...
Asked on 07/18/2021 by shamisen
1 answerI recently learned, that a voltmeter doesn't measure difference of electrical potential but difference of electrochemical potential $tilde{mu} = mu/e + Phi$. My original question was about measuring...
Asked on 07/18/2021
0 answerNewtonian Mechanics is usually presented as a theory of point particles (and forces). My impression of the status of continuum mechanics is that it is mostly taken as an approximate...
Asked on 07/17/2021
2 answerIn a closed circuit, current induced is in such a direction that it opposes the change in magnetic flux. In case of an open circuit like a metallic rod, which...
Asked on 07/17/2021 by Saprativ Ray
3 answerFrom The Best Fireproof Document Safe | Reviews by Wirecutter:Humidity can be an issue with these safes, as they tend to capture and hold in moisture, which...
Asked on 07/17/2021 by Kenny Evitt
2 answerI'm looking for some references on a specific moment of inertia, for radial motions of a spherical body. In my calculations, I got this integral :begin{equation}tag{1}bar{I} =...
Asked on 07/17/2021
2 answerI am reading a paper (and a review) on superradiance phenomena, and in particular on rotational superradiance. In this review, they consider incident radiation and classify the radiation modes by...
Asked on 07/17/2021
0 answerIn solids with unit cells containing more than one atom, the normal modes show acoustic and optical branches. The number of optical branches is proportional to the number of atoms...
Asked on 07/17/2021
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