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If we put a cube of metal on ice (ice with a certain thickness), under which conditions the cube will penetrate the ice? and how can we calculate the velocity...
Asked on 09/02/2021 by Meryem Assermouh
2 answerI am currently studying radiative transfer. In researching this subject, I found that there is stationary radiative transfer and non-stationary radiative transfer. However, it is not clear...
Asked on 09/02/2021
1 answerMultiple papers describe the ytterbium Yb IV ion as having only two energy levels. Why aren't there more levels in its spectrum?...
Asked on 09/02/2021 by Gayathri
1 answerConsider a current ($I$) carrying circular coil of radius$ R$ of $N$ turns.Consider a rectangular loop ...
Asked on 09/02/2021 by user69608
3 answerI am looking at the following derivation of the potential energy of a dipole in a uniform electric field, paraphrased from phys.libretexts.org:Consider an electric dipole $p$...
Asked on 09/02/2021
1 answerIf I take a ball from the ground and take it to the top of 3m tower ,if I drop it, is it due to the fact that potential energy...
Asked on 09/02/2021
2 answerA bead is free to slide on a vertical circular frame of radius $R$ comes to equilibrium when $cosθ = g/Rω²$.The minimum value of angular velocity comes out...
Asked on 09/02/2021 by Vasu Goyal
2 answerThe Stern-Gerlach experiment is often cited as evidence of quantum superposition and there are some very simple explanations like this one https://www.youtube.com/watch?v=hkmoZ8e5Qn0 in which spin on...
Asked on 09/02/2021 by Drummy
1 answerElectromagnetic waves experience dispersion and these result in a "chirp" in frequency after traversing some distance. This chirp can be heard when waves from a lightning strike in one magnetic...
Asked on 09/02/2021
2 answerThere are very famous Coleman–Mandula theorem and Haag–Łopuszański–Sohnius theorem , see also this and this. It states that "space-time and internal symmetries cannot...
Asked on 09/02/2021
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