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Oct
12
awarded  Custodian
Oct
12
reviewed Reviewed Difference between directional and omnidirectional transmission or reception?
Oct
12
revised Difference between directional and omnidirectional transmission or reception?
fixed grammar, removed superfluous text
Oct
12
awarded  Custodian
Oct
12
reviewed Edit suggested edit on How is a bound state defined in quantum mechanics?
Oct
12
revised How is a bound state defined in quantum mechanics?
a bit improvement of expression
Oct
7
awarded  Custodian
Oct
7
reviewed Looks OK How does an object's motion behave if dropped from an aeroplane travelling diagonally upwards?
Oct
6
awarded  Custodian
Sep
28
answered Why does the magnetic force exerted by two charged particles on each other do no work?
Sep
26
revised Degree of freedom paradox for a rigid body
Answer downvoted still, so spelt out calculation of number of constraints
Sep
9
comment Virtual Work: How is the applied force related to the coordinates chosen?
+1 but I think you need to emphasise for the benefit of the OP that if the δris were independent of one another, you could choose to set all of them to zero apart from δr1; this would then imply Fa1 MUST = 0 since the equation is true for all F δr. You'd also be able to do the same for δr2 etc which then implies that Fai=0.
Jul
26
answered How is voltage generated due to difference in temperature in a thermocouple?
Jul
2
awarded  Curious
Jun
26
comment What makes Poynting's theorem consistent for a charge moving in a static electric field?
@user37496 yes, I realized this after asking the question so made it into a brief answer.
Apr
29
comment Confusion about Length Contraction in special relativity
$$\Delta t_1 = \gamma \Delta t_o$$ $$\Delta t_2 = \gamma \Delta t_o $$ There should be a unique $\gamma_1$ and $\gamma_2$ for $S_1, S_2$ since they're moving at different velocities to one another, and therefore also to frame $S_0$. I feel this question is too localized.
Apr
29
answered Proof of Thevenin and Norton theorem
Apr
15
comment Why does Einstein say contradictions arise from treating the EM field as lines of force?
@WetSavannaAnimalakaRodVance I can remember reading Feynman somewhere giving a similar argument: The model of magnetic field lines as being gears and cogs, stresses etc in the medium in one frame, but then disappearing in another frame.
Apr
14
answered Why does Einstein say contradictions arise from treating the EM field as lines of force?
Apr
6
comment Is there an analogue of a geodesic for the evolution of the electromagnetic field?
What about using the proper time of the center of electromagnetic momentum frame?