Chapter 9, Problem 10TE

To determine

Whether the small gap in a metal ring will become wider or narrower on heating.

Answer to Problem 10TE

The small gap in a metal ring will get wider on heating as it undergoes thermal expansion.

Explanation of Solution

The method of heat transfer by the collisions between the particles and their immediate neighbors is known as conduction. The substances that can conduct the heat in this manner are collectively called conductors. Metals whose atoms and molecules have loosely held electrons are good conductors of heat.

The process where substances undergo expansion on heating is called thermal expansion. This occurs because on heating, the molecules jiggle faster and move farther apart. Being a good conductors of heat, metals undergo thermal expansion when heat is supplied.

Conclusion:

Therefore, the small gap in a metal ring will get wider on heating as it undergoes thermal expansion.