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Manishearth
Manishearth
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David Zaslacski'sZaslavski's answer is correct and complete. But I want to propose a different way to look at the problem.

Think of the disc that was cut out, and imagine that you heat it too, exactly as you heat the plate. After heating, the disc will fit in exactly to the hole, just as if it was first heated and then cut out. Therefore, the hole will expand.

David Zaslacski's answer is correct and complete. But I want to propose a different way to look at the problem.

Think of the disc that was cut out, and imagine that you heat it too, exactly as you heat the plate. After heating, the disc will fit in exactly to the hole, just as if it was first heated and then cut out. Therefore, the hole will expand.

David Zaslavski's answer is correct and complete. But I want to propose a different way to look at the problem.

Think of the disc that was cut out, and imagine that you heat it too, exactly as you heat the plate. After heating, the disc will fit in exactly to the hole, just as if it was first heated and then cut out. Therefore, the hole will expand.

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yohBS
yohBS
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David Zaslacski's answer is correct and complete. But I want to propose a different way to look at the problem.

Think of the disc that was cut out, and imagine that you heat it too, exactly as you heat the plate. After heating, the disc will fit in exactly to the hole, just as if it was first heated and then cut out. Therefore, the hole will expand.