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| visits | member for | 1 year, 8 months |
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Actress with an interest in the philosophy of science.
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May 16 |
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What is the derivation for the exponential energy relation and where does it apply? What is a memory kernel? Is is a dynamics generating function which, compared to the evolution of the Markovian variables, isn't just constant? |
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May 16 |
revised |
What is the derivation for the exponential energy relation and where does it apply? missed a minus there |
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May 16 |
suggested | suggested edit on What is the derivation for the exponential energy relation and where does it apply? |
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May 16 |
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What is the derivation for the exponential energy relation and where does it apply? I like your derivation. Still, where is the justification for $S_{t+1}=TS$ for our physical system? $S'\propto S$ of course sneaks in the exponential behaviour. |
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May 15 |
asked | What is the derivation for the exponential energy relation and where does it apply? |
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May 15 |
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The most general entropy Maybe you can get some ideas if you relate the entropy used in physics with the information theory concept. |
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May 15 |
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Precision of Coulomb's law Going to wikipedia and typing in "Inverse square law" directly leads on to this paper. Also, maybe someone wants to say something on QED implications alla vacuum polarization. |
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May 11 |
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Why is the Dirac equation not used for calculations? Good answer. A question though: What do you mean by "almost completely". As far as I can see, eighter it's a complete illusion that you can integrate out the very low scale physics and obtain all the right chemical behaviour because nowbody dared to try it yet (and I mean finer results than just stoichiometry), or the other extreme, you get the exact relations on the chemical level. |
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May 11 |
accepted | Application of plasma actuators for flow control of moving objects |
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May 9 |
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What is the mystery of turbulence? I feel your answer misses the question in a way. What you say is true and a good answer to "what is an unsolved problem relating to turbulence" and you might interpret the question like that. However, when usually people complain about their unsolved problems with turbulence, what they mean is that they feel there is no proper practical treatment of turbulence with reasonable computational effort. No engineer and maybe only theoretical physicists care about the solution to the associated mathematical problem. Unless it's constructive. Polemically: The math problem isn't all that interesting. |
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May 3 |
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Are there real life applications for Hausdorff dimensions, specifically crack formations? Fractal dimensions are being used to describe the structure of exhaust gases, like bunches of soot. |
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May 2 |
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What defines the adiabatic flame temperature? The adiabatic flame temperature $T_f$ is implicitly given by $h_f^n=h_i^n+\int_{T_i}^{T_f}c_p^n\text d T$ where $h^n$ is the enthalpy of the species $n$ and $i/f$ denote initial/final. However, if the system loses heat to the surroundings, I think computing the adiabatic flame temperature is questionable. The derivation of the integral expression, afaik, relies on $\sum_nh_f^n=\sum_nh_i^n$. The formula you wrote down might be the difference between the final temperature of the gas (heat loss included) and the temperature value you would get if you had an adiabatic combustion +$c_p$ const. |
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May 2 |
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Do we expect that the universe is simply-connected? You seem to think the Poincare conjecture says that the 3-sphere is the only simply connected 3-manifold. By your logic $\mathbb{R^3}$ (which can be equipped with the flat metric) isn't simply connected. |
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Apr 30 |
revised |
Are $A$ and $J$ in Black's equation (for electromigration reliability of wires/interconnections) independent? added 7 characters in body |
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Apr 30 |
answered | Are $A$ and $J$ in Black's equation (for electromigration reliability of wires/interconnections) independent? |
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Apr 28 |
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Is symplectic form in Hamiltonian mechanics a physical quantity? What makes a quantity physical? |
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Apr 26 |
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How can I simulate metric equations in relativity theories? @twistor59: let's do it |
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Apr 26 |
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Integrating factor $1/T$ in 2nd Law of Thermodynamics Pure thermodynamic is underappreciated. I don't see it as mere consequence of statistical physics, but rather as the more detailed theory as some sort of a model of it. In any case, if you come from the hardcore statistical side, then temperature $(\partial S/\partial E)^{-1}$ is a definition and not a mystery. Here, to me, heat flow is just energy flow which is not due to volumetric change and alike. |
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Apr 26 |
asked | Application of plasma actuators for flow control of moving objects |
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Apr 13 |
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Does spatial coupling prohibit resonances due to an external source field? @VladimirKalitvianski: Yeah, in the resonance case, yeah okay. After this discussion, I don't see how the question is tackeled yet, or at least I don't understand it. |
