One-way? Really?

Classical Mechanics Level 2

The picture shows a metal plate in the shape of a square with a circular hole cut in its middle. This plate is heated. What do you think will happen to the size (area) of the hole?

Decreases because the metal plate expands in all directions Increases because the metal wants to feel spiritually connected to the universe (holy; hole-y ;)). Increases Remains the same because only metals expand while holes do not. Decreases because the metal plate due to increase in vibrations of metal atoms in all directions.

Vishnu C by vishnu c , 22, India

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2 solutions

. .
Feb 28, 2021

If anyone heats the plate, the area of the hole will be increased. \text { If anyone heats the plate, the area of the hole will be increased. }

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Vishnu C
Jul 1, 2015

Contrary to popular belief, the size of the hole increases because every linear dimension of an object changes the same way when the temperature changes.

If you're still not convinced, think of a cubic lattice wherein upon increasing the temperature, the atoms at the corners all vibrate more bout the cubical 'hole' doesn't get filled.

When the object expands, the atoms move apart and the hole increases in size.

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