Question

what is thermal expansion ? write its merits and demerits.​

Answer 1

Explanation:

DISADVANTAGES OF THERMAL EXPANSION OF SOLIDS..

1) changing of shape and dimensions of objects such as doors..

2) wall collapsing due to bulging..

3) cracking of glass tumbler due to heating..

4) bursting of metal pipes carrying hot water or steam...

I hope it helps you..

Answer 2

Answer: Thermal Expansion is the increase in the volume or size of the body due to heat.

The demerits of thermal expansion are:

1. Cracking of a thick glass tumbler due to hot water.

2. Heat can cause the electric wires in electric poles to sag during summer season.

3. Bursting of metal pipes carrying hot water.

The merits of thermal expansion are:

1. The jammed lid of bottle can be opened by dipping it in hot water for  some time.

2. In thermometer, the mercury expands when they get hotter.

Explanation: