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If we sit in the satellite's frame of reference(which is non-inertial because the satellite is accelerating) the pendulum's bob will feel a pseudo force just opposite to the gravitational force...
Asked on 01/06/2021 by Dravit Gupta
1 answerI'm reading "An introduction to quantum fields on a lattice" by Jan Smit. In chapter 2, the transfer operator ?̂ is defined and shown to be equal to...
Asked on 01/05/2021 by completeStranger
1 answerWhy do we add a minus sign in our formula for gravity, when we might as well choose the unit vector $r_{21}$,...
Asked on 01/05/2021 by Sha Vuklia
2 answerFrom Braddick's The Physics of Experimental Method (1963):"It should be remembered that the number of significant figures in a number $y$, and one derived from it, say $e^y$,...
Asked on 01/05/2021
2 answerEveryone have probably seen the phenomenon as one opens a cold ice cream from its pack, a white cloud begins to flow around the ice cream surface, and it constantly...
Asked on 01/05/2021 by Moctava Farzán
5 answerSome authorities have stated publicly and without explanation that if the theories of Special and General Relativity were not taken into account in the design of the ...
Asked on 01/05/2021 by surd100
4 answerWhen try to do bogoliubov transformation on a weak-interaction cold atoms with uniform velocity $vec{v}$, I used two different approaches, giving two different results. The Hamiltonian is$$hat{H}=sum_{r}Psi^{dagger}(r)frac{nabla^{2}}{2m}Psi(r)+frac{g}{2}Psi^{dagger}(r)Psi^{dagger}(r)Psi(r)Psi(r)tag{1}$$...
Asked on 01/05/2021
1 answerThe scalar manifold of $D=5, mathcal N=8$ SUGRA is $$mathcal M = frac{E_{6(6)}}{Usp(8)}$$ where $USp(8)$ is a maximal compact subgroup of $E_{6(6)}$ and the 42 scalars of the theory...
Asked on 01/05/2021 by user195583
1 answerI was reading in a book that the angular momentum of the $N$-body system is of the form $Q(y,z)=y^TDz$ with $y, z$ vectors and...
Asked on 01/05/2021
0 answerIn the book "A first course of General Relativity" by Schutz I am stuck in trying to calculate Christoffel's symbols for an exact plane wave. I have the metric:...
Asked on 01/05/2021 by G.Tos
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