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Linear Expansion of pyrex

  1. Oct 19, 2008 #1
    1. The problem statement, all variables and given/known data

    A steel ball bearing is encased in a Pyrex glass cube 1.0 cm on a side. At 390K , the ball bearing fits tightly inside the cube.

    At what temperature will it have a clearance of 0.90pico meters all around?

    2. Relevant equations
    Coefficent of linear expansion:
    [tex]\propto[/tex] =(Change in L / L) / change in T

    Im not sure what my Delta L should be.....
    L= .01 m
    T initial is 390K
    the [tex]\propto[/tex] is 3.2e-6

    3. The attempt at a solution

    I just need delta L in order to solve for T final
  2. jcsd
  3. Oct 19, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    How does the expansion coefficient of Pyrex compare to that of steel?
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