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I am currently self-studying Many-Body Physics and I am using the textbook Condensed Matter Field Theory . I am currently trying to figure out the problem on page 151 (Chapter...
Asked on 06/27/2021 by Amatuer
0 answerIf there was a sufficient charge density, would it be possible for that charge to have an event horizon, a radius at which a charged particle would need to be...
Asked on 06/27/2021 by Jacob Daniels
2 answerThe ordinary Langevin equation describing the velocity $v(t)$ of a Brownian particle of mass $M$ in a fluid bath in equilibrium at a fixed temperature reads $$Mfrac{dv}{dt}=-Mgamma...
Asked on 06/27/2021
2 answerAn ideal blackbody absorbs all incident radiation. Josef Stefan found that the intensity $R$ (power per unit area) radiated by an ideal blackbody is given by $$ R = sigma...
Asked on 06/27/2021 by DWade64
2 answerThis question is about the change in energy results in change in entropy idea. I used to know that entropy only depends on spatial configuration but afterwards I learnt it...
Asked on 06/27/2021
1 answerI am wondering if the positively-charged air ions that are descending down from Earth's Ionosphere can be collected using a glass cup. Since a glass cup will allow an electric...
Asked on 06/27/2021
0 answerBernoulli's principle states that, in a steady, incompressible, inviscid flow, the sum of all forms of mechanical energy in a fluid along a streamline is the same at all points...
Asked on 06/27/2021
0 answerI am reading the paper of Gibbons and Hawking Action integrals and partition functions in quantum gravity, Phys. Rev. D 15 (1977) 2752 where they compute the gravitational action of...
Asked on 06/26/2021
1 answerI'm no expert in physics, but I was just wondering if breaking apart $rm CO_2$ into oxygen and carbon would be possible using certain electromagnetic wave?...
Asked on 06/26/2021 by Kamil Trzaska
2 answerGiven is the static and spherically symmetric metric ($c=1$)begin{equation}ds^2 = g^mathrm{(0)}_mathrm{munu}dx^mu dx^nu = -e^mathrm{2nu(r)}dt^2+e^mathrm{2lambda(r)}dr^2-r^2(dtheta^2+sin^2(theta)dvarphi^2).end{equation}The Einstein field equations arebegin{equation}G_mathrm{munu} = 2partial_muphipartial_nuphi-g_mathrm{munu}partial^gammaphipartial_gammaphi+8pi T_mathrm{munu}-frac{1}{2}V(phi)g_mathrm{munu}...
Asked on 06/26/2021 by Trafalgar
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