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Conduction question please help

  1. Apr 18, 2007 #1
    The temperature in an electric oven is 165°C. The temperature at the outer surface in the kitchen is 55°C. The oven (surface area = 1.6 m2) is insulated with material that has a thickness of 0.023 m and a thermal conductivity of 0.045 J/(sm°C).

    a) How much energy is used to operate the oven for 7 hours?

    (b) At a price of $0.10 per kilowatt hour for electrical energy, what is the cost of operating the oven?
     
  2. jcsd
  3. Apr 18, 2007 #2
    Owura, please offer at least an attempt at a solution, or what you know or even if I knew that I could get rest.
     
  4. Apr 18, 2007 #3
    I solved it
     
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