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Short question on heat

  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

    neu

    User Avatar

    What do you mean outer circumference? is it a sheet with a hole in it or a ring?
     
  4. Mar 30, 2008 #3
    Take a piece on paper and make a 2" x 2" square. In the center, draw a 0.5" diameter hole. Go to a photocopy machine and enlarge it by 30% or 40% or whatever is handy. Then measure the sides of the new square and the diameter of the hole. What happened?
     
  5. Mar 30, 2008 #4
    hi neu
    it is a solid steel
     
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