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 Mar 21 answered What causes acceleration of particles in the expansion section of a De Laval nozzle? Mar 18 answered What is the difference of work $W$ and thermal energy $Q$ in thermodynamic Stirling-process for ideal gas? Mar 17 awarded Commentator Mar 17 comment How to describe heat transfer between two solid materials? What do you think about it? Mar 17 answered choosing the right color Mar 16 comment How to describe heat transfer between two solid materials? I notice that in your last equation L is missing. But this is not the point. You have used fixed temperatures for both boundary condition, so the flux is not fixed. Can't it be that the flux is exactly $\frac{T_R-T_L}{L} \frac{k_b k_a}{k_a-k_b}$ ? Mar 16 awarded Custodian Mar 16 reviewed Approve How to describe heat transfer between two solid materials? Mar 16 comment How to describe heat transfer between two solid materials? I fear your answer is wrong. Your example is pretty general, and since "natura non facit saltus" at least as long as we don't consider an atomic scale nor a contact resistance, I think, completely wrong. Notice also that you state that boundary condition is $T_0$ on both sides of the problem, which leads to a constant solution. Ergo your demonstration is at least misleading. Mar 15 answered How to describe heat transfer between two solid materials? Feb 28 awarded Scholar Feb 27 awarded Supporter Feb 19 awarded Teacher Feb 14 answered wave-particle duality Feb 14 comment Young experiment: square of classical real wave function A, thank you very much! I'm such a pedant. I think I've fount two other errors while reading: pg40 (3.13) should be 4A^2 and not 2A^2 pg50 should be e^-(x^2/2a) otherwise you can't normalize it Feb 14 comment Young experiment: square of classical real wave function Hi Chris, I can't get why you get this function if you square Fi. I've tried to get this with basic sine\cosine transformation but I failed.I tried to ask wolframalpha and it gave me the same formula but with additional terms in the argument of cos^2(wt). It seems easy, but I can't see how the second follows the first, and it's a pity because it's a fundamental concept I guess. Thank you for your reply! Feb 13 asked Young experiment: square of classical real wave function