This one is giving me trouble because I don't know the final radius and I don't know how to find it.(adsbygoogle = window.adsbygoogle || []).push({});

1. A copper sphere of radius 2.000 cm is placed over a hole of radius 1.990 cm in an aluminum plate at 20 deg. C. At what common temperature will the sphere pass through the hole?

Ans. 747 degrees C

I'm assuming that finding the final radius is the whole point of this problem since once you know the radius the temperature is easy to calculate. Unfortunately I don't know how to find it

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# Homework Help: Thermal Expansion of copper sphere Problem

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