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So, basically Christoffel Symbols gives us the components of the vector that represents the rate of change of the basis vectors in a manifold (surface). And this equation below tells...
Asked on 03/05/2021 by user285989
0 answerConsider a system at rest with three bodies and let an external force applied.The bodies' masses are: $m_x$, $m_y$ and $m_z$. The bodies move together when...
Asked on 03/05/2021
2 answerI am going through a text which derives the energy bands in graphene (https://cpb-us-w2.wpmucdn.com/u.osu.edu/dist/3/67057/files/2018/09/graphene_tight-binding_model-1ny95f1.pdf) and am stuck on a step. Given $H = -tsum_{vec{k}, vec{delta}}e^{ivec{k}cdotvec{delta}}a^dagger(k)b(k)$ +...
Asked on 03/05/2021 by jamman2000
1 answerI can't fill in the gaps in my solution to this and assistance or a reference would be appreciated. The question begins with the straightforward derivation of the EoM for...
Asked on 03/05/2021
1 answerlet's consider a classic mercury thermometer. I do not understand why it does not behave like a "normal" thermometer which exploits...
Asked on 03/05/2021
2 answerWhen we change the magnetic flux encompassed by a loop, an induced current is produced. We know that the induced current is often explained with either the motion of loop...
Asked on 03/05/2021
2 answerThe singular isothermal sphere (SIS) is a useful simple model often used in astrophysics. It has density profile: $$rho(r) = frac{rho_0 r_0^2}{r^2}$$ This is well known to have some quirks...
Asked on 03/05/2021 by Kyle Oman
1 answerRecently i studied vector's mathematical meaning (i.e the vectors transforms the same way as co- ordinate system) and our teacher introduced us to parity operation and how vectors transforms under...
Asked on 03/05/2021 by user150854
1 answerI am reading Modern Many-Particle Physics by Lipparini. In chapter 1.5 he talks about the matrix elements of the one-body operator:$$F_1 = sum_{i=1}^{N}f(x_i)$$He mentions that the matrix...
Asked on 03/05/2021
1 answerThe potential of an isolated conducting sphere of radius R is given as a function of the charge $q$ on the sphere by the equation $V = kq/R$....
Asked on 03/05/2021 by Eason Xiao
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