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Homework Help: Heat equation

  1. Apr 25, 2010 #1
    The question :Two rods L1 and L2 of different materials( hence different thermal conductivities) and different cross-sectional areas,are joined at x=a. The temperature is continuous,
    And NO HEAT ENERGY IS LOST AT a, so all heat energy that flows from L1 flows into L2.

    ? What equation represents the condition that no energy is lost at a ?

    My thoughts : Equate the rate at which heat leaves L1 to the rate at which heat enters L2. ???
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Apr 25, 2010 #2


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