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1d
comment Why is electric potential scalar?
@Ruslan: I have looked at the editing history. Indeed, it was not the OP who put the "electrostatics" tag, it was Qmechanic. The OP initially put the "electromagnetism" tag, so your "tag" argument does not seem quite relevant.
2d
comment Why is electric potential scalar?
@Ruslan: I did miss that. However, I don't know if it was the OP who put that tag.
2d
comment Why is electric potential scalar?
@Ruslan: The OP did not mention electrostatics or the rotation group, you read that in her/his question, I did not. Moreover, the OP clearly had some doubts about the electric potential being a scalar, so why should I not tell her/him that there may be some basis for her/his doubts? It also seems that my information was interesting and useful for some other people, so I don't think my answer was a waste of everybody's time..
Feb
3
comment What will be final velocity of three charges $q$, $q$, $2q$?
It does not look like they do, so my suggestion looks wrong.
Feb
2
answered What will be final velocity of three charges $q$, $q$, $2q$?
Feb
2
comment What will be final velocity of three charges $q$, $q$, $2q$?
I guess some information on the masses is needed.
Feb
2
answered Boundary conditions for Maxwell's equations at the interface between two media
Feb
2
answered How to attract liquid metal with magnets
Jan
30
comment Energy stored in magnetic field
I don't have time to do the calculations, but the answer in the book may be wrong, according to Rob Jeffries.
Jan
30
answered Energy stored in magnetic field
Jan
29
answered Is there reduced water supply due to reduction in pipeline diameter?
Jan
29
answered Is this a valid Gauge fixing condition?
Jan
29
answered Please help me get out of this hole!
Jan
4
awarded  Yearling
Jan
2
answered If an Ising model is in contact with two thermal reservoirs, would it still experience a phase transition if one of the reservoirs is below Tc?
Dec
29
comment Can magnetic fields be redirected and focused at one point?
@igael: Well, the OP did not mind "quickly changing the magnetic field strength":-)
Dec
27
comment How to 'smooth/flatten' the surface of a disturbed liquid
@user88720: You are welcome.
Dec
27
revised How to 'smooth/flatten' the surface of a disturbed liquid
added 977 characters in body
Dec
27
comment How to 'smooth/flatten' the surface of a disturbed liquid
@user88720: thermal curing can take significantly more time than filling the depressions. This is where the microwave approach can be useful as well: you only heat a relatively thin layer, which would cool down much faster when microwave heating is turned off.
Dec
27
comment How to 'smooth/flatten' the surface of a disturbed liquid
@user88720: Maybe you can additionally pour a light and stable liquid (or even heavier-than-air gas, like CO2 or argon) on the surface, so there will be no access of oxygen to your resin, so you won't need to care about flash point.