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Area and Volume Expansion

A metal sheet...

Question

A metal sheet with a circular hole is heated. The hole
(a) gets larger
(b) gets smaller
(c) retains its size
(d) is deformed

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Solution

(a) gets larger

When a metal sheet is heated, it starts expanding and its surface area will start increasing, which will lead to an increase in the radius of the hole. Hence, the circular hole will become larger.

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