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Homework Help: Thermal Expansion (again)

  1. Jan 27, 2009 #1
    1. The problem statement, all variables and given/known data
    A hole in an aluminum plate has a diameter of 1.179 cm at 22.00 degrees Celsius.
    Part A asks for the diameter of the hole at 199 degrees Celsius.?
    Part B asks for the temperature of the hole when its diameter is 1.177 cm?

    2. Relevant equations

    ∆L = alpha L(0) ∆T

    3. The attempt at a solution
    I got the answer for Part A.

    Here's what I did so far for Part B:
    I manipulated the equation as follows:
    ∆L/alpha*L(0) + Temp (initial) = Temp (final)

    And I used the difference between 1.177 and 1.179 cm for ∆L, used 1.179 for L(0) and the 22 degrees C for the initial temperature. Is this method correct?
  2. jcsd
  3. Jan 27, 2009 #2
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