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visits member for 3 years, 5 months
seen Dec 22 at 14:39

Oct
27
accepted How to show that $(\xi\eta-\eta\xi)|A\rangle = 0$?
Oct
14
accepted Should the eigenkets be weighted in $|P\rangle = \sum\limits_{r}|\xi^r\rangle$?
Sep
24
accepted How does Dirac conclude that $X_r(c_r)$ cannot vanish?
Sep
24
accepted What experiments compete with BICEP 2, and when are their results expected?
Sep
23
accepted How does Dirac form this conjugate imaginary equation?
Sep
3
accepted How does Dirac show that $\langle B|\bar{\bar{\alpha}}|P\rangle\;=\; \overline{\langle P|{\bar{\alpha}}|B\rangle}\;=\; \langle B|{\alpha}|P\rangle$?
Aug
26
accepted Can relativistic kinetic energy be derived from Newtonian kinetic energy?
Aug
24
accepted Is there a “forwards” and “backwards” in one dimension?
Jun
13
accepted Why isn't there a limit for a Euclidean rotation, as for a Minkowski rotation?
Sep
26
accepted Why does a stationary force affect the conservation of momentum, but not the conservation of energy?
Mar
16
accepted Must the Lagrangian always be known for the Euler-Lagrange equations to be of any use?
Dec
20
accepted Calculate relativistic boost to COM frame from two arbitary velocities?
Jul
27
accepted Explanation for $E~$ not falling off at $1/r^2$ for infinite line and sheet charges?
May
6
accepted Why is there a $\frac 1 2$ in $\frac 1 2 mv^2$?
Apr
7
accepted Is the change in kinetic energy of a particle frame independent?
Nov
14
accepted Is Einstein's 1916 General Relativity paper a recommended way to start learning about the subject?
Nov
12
accepted Is (0,0,0) an undefined vector?
Oct
25
accepted Does a photon in vacuum have a rest frame?
Sep
25
accepted The bar tender says we don't serve Tachyons around here?