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Thermal conductivity conceptual

  1. Feb 24, 2012 #1
    1. The problem statement, all variables and given/known data So the outside of a refrigerator is made up of plastic, metal, and insulation? Which is the most important and why.

    2. Relevant equations
    no equation needed.

    3. The attempt at a solution
    I thought that the insulation would be the most important because it reduces the overall heat flow. But my professor is looking for more and i really don't know what else to say.
  2. jcsd
  3. Feb 24, 2012 #2
    I guess your professor wishes you to discuss the pros and cons of all three materials such as the relevant mechanical/physical and other properties and other issues relating,for example,to economic and environmental considerations.
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