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visits member for 2 years, 8 months
seen Nov 19 at 13:12

May
30
comment Magnetic field in materials with non-constant magnetic susceptibility
Thx, but sorry to say, there is nothing new for me in your answer.
Sep
18
comment Why the Principle of Least Action?
"In mathematics you don't understand things. You just get used to them." John von Neumann
Aug
21
comment Euler's equations of rigid body motion from least action principle
I think I know where is the problem. $\Omega$ is not state variable!!! It indicates only the rate of rotation.
Jun
29
comment Can universe be a closed manifold?
Ohh sorry there should be probably only a space.
Jun
18
comment Ball jumping from water
I'll give it a try.
Jun
15
comment Ball jumping from water
which formula do you exactly mean? By any formula there I would get straight trajectory and that is definitely not going to predict my observations. One thing I forgot to mention. It seamed like the ball when released from 3m depth was rotating when it hit the surface that might stopped the jump.
Jun
15
comment Does shadow have mass?
One would expect that shadow's mass would be proportional to its area like paper's mass is proportional to its area. So I show that this cannot be happening. Paper don't get bigger and smaller when you move it around but shadow does!
Apr
15
comment Boundary conditions of Navier-Cauchy equation
doesn't the small deformation condition mean that it works as long as Hook's law holds?