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seen Apr 12 at 16:18

NTS


Feb
16
awarded  Organizer
Feb
16
revised Verification of mass density function in continuum mechanics
Added Latex for all formulae
Feb
16
suggested approved edit on Verification of mass density function in continuum mechanics
Feb
15
answered Does light itself experience time dilation?
Feb
7
awarded  Citizen Patrol
Feb
7
revised Lagrangian when there are gyroscopic effects
added 133 characters in body
Feb
6
asked Lagrangian when there are gyroscopic effects
Feb
4
comment How the torque/moment-of-force can be mathematically defined?
Yes it is, they are not being added, they are being multiplied. Do you have any trouble multiplying distance with the inverse of time to get a speed? This is the same thing.
Feb
4
comment How the torque/moment-of-force can be mathematically defined?
Well... you are not adding position and force which wouldn't make sense. You're multiplying them, which produces a new unit Newton*meter. Mathematically, they both belong to $\mathbb R^3$, so they belong to the same space and that product is perfetly well defined.
Jan
29
comment Why does choosing a time break covariance?
Some simple example would be greatly appreciated, I think that would trigger my understanding. Thank you for your answer by the way.
Jan
29
comment Why does choosing a time break covariance?
That is exactly my question, in which point of defining canonical momentum or legendre transforming the lagrangian do you fix a time? Couldn't you just define the momentum to be $\partial\mathcal L/\partial\dot\phi$, with the dot representing any parametrization of time in minkowsky space?
Jan
24
revised Electric dipolar moment of a half wave antenna
deleted 26 characters in body
Jan
24
comment Electric dipolar moment of a half wave antenna
@Georg never mind, the name is irrelevant. It's a wire with that current.
Jan
24
asked Why does choosing a time break covariance?
Jan
24
comment Electric dipolar moment of a half wave antenna
@Georg Sorry, half wave
Jan
24
revised Electric dipolar moment of a half wave antenna
added 17 characters in body
Jan
24
asked Electric dipolar moment of a half wave antenna
Jan
22
asked Charge movement in a rotating EM field (relativistic)
Jan
8
awarded  Yearling
Dec
17
revised Constant quantity associated to symmetry
added 233 characters in body