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Apr
29
comment Decrease in entropy in a fluid flow
btw, there might be a flow without pressure gradient --- you can just move to another reference frame. So just the fact that fluid is flowing does not make it more ordered, but you might have already came up with that argument.
Apr
28
answered Decrease in entropy in a fluid flow
Apr
28
comment Is symplectic form in Hamiltonian mechanics a physical quantity?
@NickKidman I would refrain from answering such question however directly related to my question it is.
Apr
28
asked Is symplectic form in Hamiltonian mechanics a physical quantity?
Apr
20
comment How can I find the temperature of this system?
$0.223 \ldots = \ln(1.25g)-\ln g \approx \frac{d \ln g}{d g} \Delta g = 0.25$ They are practically the same and both are approximations. None is more correct.
Apr
19
comment How can I find the temperature of this system?
Why do you think this is incorrect?
Apr
19
comment How to create visible reflections in shallow water?
@AnishaKaul I guess so if it doesn't destroy the paper. Look, it's Physics, not Math. You just try it instead of musing (provided it is not expensive).
Apr
18
revised How do I intuit viscosity in a rotating fluid?
added 466 characters in body
Apr
18
answered How do I intuit viscosity in a rotating fluid?
Apr
17
comment How to create visible reflections in shallow water?
@AnishaKaul I've updated the answer
Apr
17
revised How to create visible reflections in shallow water?
added 634 characters in body
Apr
17
comment How to create visible reflections in shallow water?
@AnishaKaul Just make coffee without milk, I thought it should be black. I mentioned coffee because it seems to be readily available. You can use ink instead or something like that.
Apr
17
revised How to create visible reflections in shallow water?
added 686 characters in body
Apr
17
answered How to create visible reflections in shallow water?
Apr
11
comment Can a dot of light travel faster than the speed of light?
OP asked about FTL speed, you answered the speed would be exactly $c$, so the answer should be 'No'. However is there a simple argument to show that the dot speed would be $c$, not a certain fraction of it?
Apr
11
comment Can a dot of light travel faster than the speed of light?
Could you please address a (popular) concern that the beam would bent, just like a water from a hose?
Apr
8
comment Universal Sequence and relationship of mathematics and reality
@Xaqron check oeis.org/A002823 If this is the sequence you are talking about, link to it in your question. OEIS might be the primary reference site for integer sequences.
Apr
5
comment Universal Sequence and relationship of mathematics and reality
Anyway, I do not see a point in commenting philosophical remarks, at least on this site. The quote of Einstein is hardly related to physical theory, it is simply not a part of physics.
Apr
5
comment Universal Sequence and relationship of mathematics and reality
For whom might be interested the article by Metropolis, Stein, and Stein dx.doi.org/10.1016/0097-3165(73)90033-2 the pdf is freely downloadable.
Apr
5
comment Universal Sequence and relationship of mathematics and reality
What is Universal Sequence?