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Homework Help: Quick question on thermal expansion.

  1. Feb 1, 2009 #1
    1. The problem statement, all variables and given/known data
    In a bimetallic strip of brass and copper which curls when heated, the brass is on the inside of the curve.

    True or false?

    2. Relevant equations


    3. The attempt at a solution
    It is false but I do not get why. Brass has a higher coefficient of linear expansion so if it is in the inside, I suppose it will expand faster than the copper causing stress in the copper to curl?
  2. jcsd
  3. Feb 1, 2009 #2


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    Homework Helper

    Brass expands more, so the strips will bend so the brass strip is on the outside. If it bent so far as to form a circle, you could say greater radius, greater circumference.
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