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"If a heavy current in drawn from a cell, a large number of charge carriers flow through the electrolyte sand hence more work is done. This results in more voltage...
Asked on 10/04/2021
3 answerWhy we can't make chain reaction in fusion or we can't use fusion products . Deuterium $-$ Helium$-3$ fusion :$$2D+3He→4He+1p+ 18.3 text {MeV}$$ (I found in...
Asked on 10/04/2021
1 answerI was following lecture notes of Sidney coleman (https://arxiv.org/abs/1110.5013)(page 7) where he stated:"The addition of relativity is necessary at energies $E geq m c^{2}$. At these...
Asked on 10/04/2021
0 answerIt is straightforward to show that$$ left[T_leftarrowexpleft(-iint_0^tH(tau)dtauright)right]^{-1} = T_rightarrowexpleft(iint_0^tH(tau)dtauright), $$where $T_leftarrow$ and $T_rightarrow$ impose time-ordering and anti-time-ordering, respectively. I'm wondering what the inverse of...
Asked on 10/04/2021
0 answerThe electron has magnetic dipole moment which points in the spin direction, which is relatively easy to understand because it mostly follows from the definition. However, why is it that...
Asked on 10/04/2021
1 answerI don't see anything that appears to be an application that depends on the pi-meson like some of the other particles. Originally Yukawa Hideki predicted the pi-meson while lecturing at...
Asked on 10/04/2021 by user86411
2 answerIn scalar QED, applying Noether's theorem for internal global symmetries results in a Noether current that is dependent on the gauge because of the presence of the covariant derivative. ...
Asked on 10/04/2021
1 answerThis may seem like a very simple question, but I've been agonising over it for days. What is the probability, $p$, that two chemical species with binding energy ...
Asked on 10/04/2021 by Joe Buckley
1 answerSo I've learnt that the formula for optical path length is $OPL = ns$, where $n$ is refractive index of the medium and $s$ is its geometrical...
Asked on 10/04/2021 by Critac Arpol
1 answerMy question is very simple: if I have a vector field $boldsymbol{phi}(t,boldsymbol{x})$ defined inside an $n$-dimensional manifold $mathcal{M}_n$ to which $boldsymbol{x}$ belongs, why should it be...
Asked on 10/04/2021
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