Question

What is thermal expansion? Write it's two metris and demerits each.​

Answer 1

Answer:

Thermal expansion describes the tendency of an object to change its dimension either in length, area or volume due to heat. Heating up a substance increases its kinetic energy. Depending on the type of expansion thermal expansion is of 3 types– Linear expansion, Area expansion, and Volume expansion.

Explanation:

Answer 2

Answer:

The general increase in the volume of a material as its temperature is increased.

Explanation:

\alpha_{L} = thermal expansion

{L} = particular length measurement

{dL} = change in length

{dT} = change in temperature