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Let $u = u(X,t) = varphi(X,t)-X$ be the displacement field. Define the quantity $$psi = 1/2int_Omega rho u^Tu~mathrm dX$$ where $rho$ is the mass density. So...
Asked on 12/09/2020 by letslearnmath
1 answerIsn't it just 1 coulomb of electrons passing any cross section per second? Why is it involved here in magnetism?...
Asked on 12/09/2020
2 answerWhy is change in enthalpy ΔH equal to heat exchanged following whether reversible or irreversible path whereas TΔS is equal to the heat that would be exchanged if the process...
Asked on 12/09/2020 by Guidogiamp
0 answerI am confused about how to interpret the apparently discontinuity which can arise in the massless limit of dimensionally regulated integrals. My questions are illustrated by the following example: Consider...
Asked on 12/09/2020 by user26866
0 answerI'm reading a review on the Ising model and came across a section where they discuss Legendre transforms of thermodynamic potentials. Now I'm familiar with the classical thermodynamic relations such...
Asked on 12/09/2020 by PianoEntropy
1 answerI have seen many places claiming that the given a collection of topological defects on a 2-dimensional surface, the sum of the topological charges is $2pichi$ (where $chi$...
Asked on 12/09/2020 by Chetan Vuppulury
1 answerGreetings I am having trouble to understand how the distribution should be if the dipole is not at the origin and not along z-axis. For a hertz dipole with length...
Asked on 12/09/2020 by bigboss
1 answerIn classical field theory (for a single field $psi$) the dynamical variables are defined to be functions of the fields $psi$, $pi$, $partial_{x_{i}}psi$ and maybe ...
Asked on 12/09/2020 by AndresB
1 answerI am having trouble understanding the total energy for a heavy spinning symmetric top (Gyroscope) on a friction-less surface.I am trying to understand it via the Lagrangian of the...
Asked on 12/09/2020 by C.Pic
2 answerLong ago in high school I saw a short film in which as I recall the apparatus was just a spinning paper plate (with holes along its edge) with a...
Asked on 12/09/2020
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