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Thermal conceputal questions

  1. Feb 18, 2012 #1
    1. The problem statement, all variables and given/known data
    Hi so i have a few questions on thermal properties, the questions are supposed to be conceptual with no calculations.
    1. There are 3 containers. They are made of plastic, glass and alluminum. If you put hot water into the 3 containers, why is there is small difference in temp. change between the 3 containers and large difference in their thermal conductivity.
    2. The outside of a refrigerator is made of metal, plastic and insulation. We were supposed to pick one of the 3 materials and why its drastically important than the other two. I picked insulation and basically said that its more important for the function of the fridge because it reduces heat flow. But i got it wrong. Could someone help me on these 2 questions.


    2. Relevant equations
    No equations necessary.


    3. The attempt at a solution
     
  2. jcsd
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