network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 2 years, 4 months |
| seen | May 6 at 8:53 | |
| stats | profile views | 76 |
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May 18 |
awarded | Necromancer |
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Apr 11 |
comment |
About gravity through space time curvature Last time I looked "energy of the gravitational field" was ill-defined. It probably still is. |
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Apr 11 |
comment |
Does an Ising lattice that returns to equilibrium create a current by induction? What I'm looking for is the Ising model coupled to the current, so that one can calculate the induction from the lattice parameters. Alternatively, has somebody just plainly measured it? I mean, is there some reference on this? See, it isn't really clear to me how local currents do or don't add up to a global one. |
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Apr 11 |
comment |
Is there a symmetry associated to the conservation of information? No, it doesn't. An equation of motion for a system a priori doesn't even have to be reversible, in which case it certainly doesn't preserve anything that deserves to be called information. |
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Apr 8 |
comment |
Is there any anti-gravity material? This is wrong for three reasons. First, you need energy to move the object because it still has inertial mass. Second, the sheet will move. Third, the sheet (planar) will not homogenously shield the gravitational field of the earth (sphere). |
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Apr 8 |
comment |
Does entropy really always increase (or stay the same)? Yes, one could put it this way. It sounds somewhat tautological of course, but the point is that you first have to define what you mean with a microstate and a macrostate and with order, etc. I mean, exactly what you do in stat mech. |
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Apr 8 |
answered | Does entropy really always increase (or stay the same)? |
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Apr 8 |
comment |
Does an Ising lattice that returns to equilibrium create a current by induction? I was thinking of an atomic lattice. What does the electric fields to electrons in the conducting band if not create a current? But you're right in that my question confuses both. In any case, do you have any sort of reference for whether or not magnetic induction is or isn't present? |
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Apr 6 |
comment |
covarient derivative of electromagnetic field tensor Guessing: Use the equations of motion, they're more or less equivalent to energy-conservation. Also, use the symmetry of F and of Gamma to twiddle indices. That should do the trick. |
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Apr 6 |
asked | Does an Ising lattice that returns to equilibrium create a current by induction? |
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Apr 6 |
answered | What particles carry various forms of energy? |
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Apr 6 |
comment |
Why is the colour of sunlight yellow? Sorry, but this answer doesn't make sense. As FrankH said above, sunlight is not white. The light of no star is white. They all have an almost black-body spectrum that peaks at some frequency. As I said in my reply too. Which was downrated by somebody, lmfao. Eh, guys, this is really low standard. You seriously asking "do you have citations claiming sunlight is yellow without scattering". Man, the sun's spectrum has been measured up and down since 500 years, why don't you try Wikipedia for starters?? |
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Apr 6 |
comment |
Why is the colour of sunlight yellow? How is that of any relevance? |
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Apr 6 |
answered | Lorentz boost matrix for an arbitrary direction in terms of rapidity |
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Apr 6 |
awarded | Popular Question |
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Mar 26 |
awarded | Nice Answer |
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Jan 19 |
awarded | Yearling |
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Dec 27 |
answered | Why is the colour of sunlight yellow? |
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Dec 27 |
answered | Black hole formation as seen by a distant observer |
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Dec 27 |
answered | What entities in Quantum Mechanics are known to be “not quantized”? |
