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comment Measuring Rotation of Sun
My question then could be effectively changed to, How do we know that the core of the sun is rotating? It seems we only expect this because we see the outer surface rotating and assume viscosity...it would be nice if distant general relativity effects could validate core rotation.
Feb
4
comment Measuring Rotation of Sun
Interesting. Let me see if anybody has a way to beat the detectability of −0.0003 arcseconds/century before I mark this as the answer.
Feb
4
comment Measuring Rotation of Sun
Not exactly, but I know my question is getting a little impractical now. Just trying to investigate how much rotation effects things in general relativity since it has no effect in classical mechanics.
Feb
4
revised Measuring Rotation of Sun
added 158 characters in body; edited tags
Feb
4
comment Measuring Rotation of Sun
I was trying to avoid any surface effects...sorry, I will edit my question.
Feb
4
asked Measuring Rotation of Sun
Dec
27
comment Waterproof Case Time Limits
I moved this question to the engineering site and reworded it.
Dec
24
asked Waterproof Case Time Limits
Dec
19
comment What wavelength of light is the least absorbed by water?
I think you meant "you need wavelengths a million times longer", but I don't want to edit the answer since it's a big difference.
Dec
13
comment Spacetime and uncertainty principle
Relativity and quantum physics are not unified into one theory, so all answers will be more like speculation.
Dec
13
asked Superheating Water Demonstration with a Vacuum
Dec
12
comment Do liquids creep from cold to hot like gases?
No, nothing prevents convection which I think is fine. Honestly, I chose this experiment because it seemed like the best way to check for thermal transpiration in liquids, but after quantifying things since posting this, I now believe the pressure difference is unmeasurable. So, that leaves me looking for a better experiment...
Dec
7
comment Do liquids creep from cold to hot like gases?
I am thinking the steady state might have flow from right to left in the tube's center ("pressure" from hot) and compensating flow from left to right along the tube's perimeter ("creep" from cold). This flow and the pressure difference is smaller for wider tubes, but still finite. Anyway, if the water were replaced by gas, thermal transpiration experiments show that pressure does change along the bottom, despite a steady state, so I don't think I've "implied that there is no pressure change along the bottom".
Dec
7
awarded  Yearling
Dec
7
answered physical meaning of major symmetry of the stiffness tensor
Dec
6
asked Do liquids creep from cold to hot like gases?
Sep
7
awarded  Notable Question
Jan
29
awarded  Popular Question
Sep
19
accepted Bond Angles - H2O vs CO2
Sep
16
comment Bond Angles - H2O vs CO2
@Wildcat In the Born-Oppenheimer (or Car-Parrinello) approximation, does a single SiO2 molecule come out as linear? And, is a single SiO2 molecule truly linear? I know that most SiO2 is bulk silica which changes everything, but wondering if the ball-stick model still works for a single SiO2 molecule (which would be equivalent to a CO2 molecule though Si's ball is bigger).