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Homework Help: Heat flow and entropy

  1. Dec 2, 2009 #1
    1. The problem statement, all variables and given/known data

    Bob who is working on a glacier wants to experiment with heat and has constructed a two part metal rod. The left rod is silver and has length L1 = .5454 M, and has a cross sectional area A = 3.1416 CM^2. It is joined end to end with a lead rod of identical diameter and length L2 = .3554 M. Bob has insulated the curved surface, placed the left end in a pot of boiling water and the right end in a hole in the glacier. After thermodynamic equilibrium has been achieved, there is a puddle of water in the glacier and the assumption that the right end is at a temperature T1 = 0.00 deg C.

    1) Calculate the heat flow per second through the rod.
    2) Calculate the temperature, T2, at the interface between the two rods.
    3) Calculate the change in entropy of the teapot in one second.
    4) Calculate the change in entropy of the glacier in one second.
    5) Calculate the change in entropy of the universe in one second.

    2. Relevant equations

    S = Q/T

    3. The attempt at a solution
  2. jcsd
  3. Dec 2, 2009 #2
    show what ur attempt...
  4. Dec 2, 2009 #3
    values of conduction coefficient of silver and lead are provided or not???
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