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Jul
4
revised Compressilibility and the form of Newton's second law in fluid mechanics
added 409 characters in body
Jul
3
revised Compressilibility and the form of Newton's second law in fluid mechanics
deleted 1 character in body
Jul
3
answered Compressilibility and the form of Newton's second law in fluid mechanics
Jun
23
comment Which direction does a galaxy move in respect to its axis of rotation (Black Hole)
Regarding the question title: Central black holes, even the most supermassive ones, are not nearly massive enough to affect the orbital dynamics of most of the stars in a galaxy
Jun
20
comment Why does my gravity simulation do this?
If you're not conserving energy to a satisfactorily level in your simulation, then something has gone wrong. My best guess is that when the two particles come close together, the maximum required time step you could take without encountering problems shrinks drastically, and you are introducing an error that is manifesting as a lack of energy conservation.
Jun
10
comment Can the hot combustion products from a large flame be in “non-local thermal equilibrium”
Am I correct in thinking that we must be careful to distinguish between the thermalization of the free electrons, and the thermalization of the molecular energy levels? For instance, I could imagine a situation in which the free electrons rapidly come to a Maxwellian distribution, but the population of the water molecule energy levels are not what one would calculate based on Boltzmann factors. This is often the case in astrophysics, for example, and there is a huge literature concerning radiative non-LTE effects. I don't know if this is analogous to the combustion problem posed here, though.
Jun
10
answered Do negative numbers have any physical meaning?
Apr
29
comment Why does gravitational collapse occur suddenly in a supernova progenitor?
@SachinShekhar I think the question doesn't concern the acceleration of material once collapse has begun, but relates to the time scale over which collapse begins in the first place (support is removed).
Apr
29
reviewed Edit suggested edit on Does blackbody radiation work like this?
Apr
29
revised Does blackbody radiation work like this?
spellings corrected, added tag
Apr
29
revised Why does gravitational collapse occur suddenly in a supernova progenitor?
deleted 2 characters in body; edited title
Apr
29
reviewed Approve suggested edit on Quantum Entanglement - What's the big deal?
Apr
22
answered Why don't we need to normalize wavefunction to find probability distribution?
Apr
17
comment Acceleration of electric charges and radiation
possible duplicate of Where did Schrödinger solve the radiating problem of Bohr's model?
Apr
13
answered Why is the black body radiation so important?
Apr
10
comment Light emanating from finger tips?
Could be a static shock
Apr
8
comment Hanging a brick free over an edge by stacking them
Nope, the overhang goes as 1/n, which diverges. mathworld.wolfram.com/BookStackingProblem.html . And note that 2006 paper mentioned at the bottom of the linked article - it might address your question of more efficient overhang structures using multiple blocks per level.
Apr
8
comment Hanging a brick free over an edge by stacking them
A nice thing about the first method is that is not so hard to show that, with enough layers in your stack, allow the topmost edge to portrude arbitrarily far away from the base.
Apr
6
revised Journal for high school physics papers
added 73 characters in body
Apr
6
answered Journal for high school physics papers