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During calculation of the Q-value in beta decay, is the mass of the electrons of the reactants (and product) atom included during calculation of Q-value?...
Asked on 06/08/2021 by tarzanjunior
2 answerI am dealing with a one-dimensional system that has a discrete translational symmetry, i.e. the Hamiltonian has the form$$hat H= frac{hat p^2}{2m}+V(x)$$where $V(x+a)=V(x)$ and...
Asked on 06/08/2021 by Caos
0 answerI'd like to calculate the commutator of the Lorentz transformations on a scalar field and I've already done it years ago, but recently I suspect my calculation.Let me fix...
Asked on 06/08/2021
0 answerWhat is the meaning of "twenty digits accuracy" of certain QED calculations? If I take too little loops, or too many of them, the result won't be as accurate, so...
Asked on 06/08/2021 by yonni
1 answerI know that in general a "non-pure" state described by : $$ rho = sum_i p_i |psi_iranglelangle psi_i| $$ can't be written as $ rho = | phiranglelangle phi|$. But...
Asked on 06/08/2021
2 answerHow do I rewrite a Hamiltonian written as some integral over momenta, e.g.,$$ H = intfrac{d^d vec k}{(2pi)^d}omega(vec k) a_{vec k}^dagger a_{vec k} $$in terms of energy...
Asked on 06/08/2021
1 answerParticle is said to be right-handed (right-helicity) if the direction of particle's spin is in the same direction with it's motion and left-handed (left-helicity) if they are opposite. ...
Asked on 06/08/2021
1 answerI know how magnetic flux is mathematically defined, and it clearly has dimensions of kg m^2 A^-1 S^-2, but I've read magnetic flux being described as "number of magnetic field...
Asked on 06/08/2021
1 answerIn a pressure cooker, when T increases -P increases which means that the K.E of molecules increases. But According to equation PV/Tinc so T inc P inc and V dec....
Asked on 06/08/2021
2 answerHere's a question I got in my final exam this morning. "If in Young's double-slit experiment setup, the ratio of the intensity of the bright spot to the dark spot...
Asked on 06/08/2021 by sayantankhan
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