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How to prove $E_{n1}\leq E_{n2}$ for a particle in two potential fields $V_1(x)\leq V_2(x)$

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Describe an experiment to measure saturated vapour pressure of a liquid in physics with precautions listed and the well-labelled diagram

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What is the difference between $UXU^{-1}$ and $UX$?

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Opacity/transparency of conductive meshes to charged particles (electrons/ions)

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Does quantum mechanical ground state in linear sigma model exhibit spontaneous symmetry breaking?

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What is photon direction of backward amplified spontaneous emission (ASE)?

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How to visualize the amplitude of a longitudinal wave?

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Isotope composition of uranium slugs after they were ejected from the Hanford piles in 1945?

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Commutation of $X$ and $P$ in second quantization

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How to decide the voltage sign of inductor in a circuit?

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Can discreteness of Area in LQG be understood as flux-quantization?

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Deviations from purely circular orbit for an object in a Yukawa potential

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Work done to raise an object in two sample cases

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Is the eigenfunction of the angular momentum operator unique?

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