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Apr
27
revised Does contracted spring weigh more than stretched one?
added a few extra details
Apr
26
answered Does contracted spring weigh more than stretched one?
Apr
23
revised Physical Significance of the Planck Density
[Edit removed during grace period]
Apr
13
revised Derivation for the most probable macrostate for distinguishable particles using lagrange's method of undetermined multipliers
Fixed formatting problem.
Apr
13
suggested approved edit on Derivation for the most probable macrostate for distinguishable particles using lagrange's method of undetermined multipliers
Apr
7
comment Three integrals in Peskin's Textbook
That's Prof. Schroeder actually!
Mar
31
comment 2->2 scattering, Lorentz invariance phase space, Schwartz Eq5.29
Thanks, that makes sense! Not sure why I missed that.
Mar
31
asked 2->2 scattering, Lorentz invariance phase space, Schwartz Eq5.29
Mar
24
comment Classical field limit of the electron quantum field
Also, bosons (massive and massless) can be described by a classical field in the large N-limit.
Mar
24
comment Classical field limit of the electron quantum field
Yes, that's right. QFT reduces to QM in the non-relativistic limit.
Mar
24
answered Classical field limit of the electron quantum field
Mar
20
comment The force causing galaxies to accelerate away from each other?
@Benjamin, that is not correct. Where did you get that from? I think it is wrong to make such statements without even providing a reference.
Mar
16
answered Physical Significance of the Planck Density
Mar
6
comment Is the cosmological time grosso modo isochrone?
See arxiv.org/abs/1407.7979 .
Mar
4
awarded  Altruist
Mar
2
awarded  Investor
Feb
17
awarded  Popular Question
Jan
23
comment Measuring force of a punch
Ask them to punch 10 times and try hit the centre each time. Take the maximum force as the one that hit the centre.
Jan
10
comment $N$-body simulation in General Relativity
There are loads of articles on this, see for example arxiv.org/abs/1511.05124
Dec
29
revised How do virtual photon cloud produce discrete magnetic field lines in bar magnet?
large to macroscopic