Question

What is thermal expansion? Give one example in support of your answer​

Answer 1

Answer:

Automatic fire alarm is an example of expansion on heating, which is put to good use. The fire alarm works on the principle that different solids expand differently when heated. An automatic fire alarm consists of a bimetallic strip which have two different metals strips, iron and brass, bolted together firmly.

Answer 2

Explanation:

Thermal expansion is the tendency of matter to change in shape, volume, and area in response to a change in temperature. ... The degree of expansion divided by the change in temperature is called the material's coefficient of thermal expansion. It is found to generally vary with temperature.