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Homework Help: Thermal expansion

  1. Mar 30, 2008 #1
    1. The problem statement, all variables and given/known data
    this is a 2 marks question
    a hole is drilled through a piece of steel what happens to the diameter of the hole as the steel is heated

    2. Relevant equations

    3. The attempt at a solution
    i guess the diameter of the hole decreases as both the outer as well as inner circumference are free the outer circumference expands outside and inner circumference towards in resulting the hole to be small..............
  2. jcsd
  3. Mar 30, 2008 #2


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    Instead of the hole, pencil a circle on the steel.
    What happens to the penciled circle as the steel is heated?
  4. Mar 30, 2008 #3
    the circle drawn with a pencil will increase coz there is no free space for circle, but for a hole there will be free space
  5. Mar 30, 2008 #4
    I think pam wants you to actually do the experiment. This is a pretty common question so do some internet research and you can find the answer.
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