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I understand Carnot's theorem, specifically the result that "the efficiency of all reversible engines operating between the same two temperatures is the same." The proof is by contradiction and you...
Asked on 07/07/2021
2 answerIn a half wave rectifier only a single diode is present. One end of the secondary wire of the transformer is connected to the p side of diode while the...
Asked on 07/07/2021 by Esha Mukhopadhyay
2 answerAs the title says, is it possible to laser cool without generating a weak quadrupolar magnetic field? Also, if I wasn't trying to achieve extremely low temperatures is it possible...
Asked on 07/07/2021 by G Gr
2 answerCan anyone prove the time-reversal invariance of the following scalar field theory?$$ mathcal{L}=frac{1}{2} partial_{mu} phi partial^{mu} phi-frac{mu^{2}}{2} phi^{2}-gphipsi^*psi+partial_{mu} psi partial^{mu} psi^*-m^2psi^*psi$$...
Asked on 07/07/2021
0 answerI want to start going through the book "Holographic Quantum Matter" by Hartnoll, Lucas, Sachdev but it seems that my background in basic solid state physics and basic quantum field...
Asked on 07/07/2021
1 answerWe define the four-momentum of a particle by $p^mu = (E, mathbf{p})$, where $E$ is energy and $mathbf{p}$ the three momentum of the particle. In cosmology, we...
Asked on 07/07/2021
0 answerAs it knows the edge states in QSHE are protected by TR symmetry, so any perturbation that are symmetric under time reversal cannot destroy these states. A key point...
Asked on 07/07/2021 by Phys Dag
0 answerJust wondering if anyone had any links to good web based interactive models of lattice unit cells? Especially primitive unit cells? The one I used to use was built with...
Asked on 07/07/2021
2 answerI watched a video on Vernier Calipers which gave me an understanding of how it works and how to read a Vernier Caliper. I also tried the...
Asked on 07/07/2021
0 answerI am a high school student that has attempted carrying out the simple pendulum experiment for angles between 10,20,30,40,50 degrees and realized from the result that there is a 0.01...
Asked on 07/07/2021 by user276286
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