Question

when a block with a hole in it is heated then y does not the material around the hole expand in to the hole and make it small

Answer 1

Answer:

When this small element expands due to heat supplied and end points are assumed to be held fixed, thermal stresses will drastically build up . Only way to negate this compressive stress is to allow the circumference to increase which implies diameter of the hole will also increases.

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Answer 2

Answer:

Explanation: If you heat the ring it expands, making the circumference bigger.when the block is heated its temperature increases.the block will expand on heating and its all dimensions increases.therefore diameter (size)of hole increases