Recent content by Kibble

  1. K

    Finding the invalid fundamental equation in Callen problem 1.10-1

    Yeah! The issue is that it would require entropy less than zero.. which may be problematic for lots of other reasons. I got carried away by math and stopped thinking about the physical implications. In chatting with some of my peers, we eventually came to the conclusion that i) was okay but...
  2. K

    Finding the invalid fundamental equation in Callen problem 1.10-1

    Late reply, but try checking postulate 4 on (i). When I put it into mathematica, I got a non-zero solution for S. $$u1 = \frac{v0 \theta}{R} \frac{S^2}{V} e^{\frac{S}{n R}};$$ Solve[D[u1, S] == 0, S] {{S -> 0}, {S -> -2 n R}}
  3. K

    Insights Interview with physicist David J. Griffiths

    I may be alone in this, but I find this statement troublesome: The language he uses here, and throughout the interview, seems to reinforce the rift between the lay-person and the scientist. While it is certainly true that some physical concepts require a lot of math to fully develop, it is...