physics

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A silver bar 0.125 meter long is subjected to a temperature change from 200 C to 100 C. What will be the length of the bar after the temp change?
A:0.124764 meter
B:0.00023635 meter
C: 0.00002363 meter
D:0.0000189 meter

  • physics -

    deltal=L*alpha*deltaTemp
    Now you know it will be small. Subtract it from .125.
    So only one answer is possible of the choices. You don't need to do any calculations.

  • physics -

    A:0.124764 meter

  • physics -

    d

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