Question

what do you understand by the thermal expansion of a substance

Answer 1

when an object expanse by gaining heat than it is called thermal expansion

Answer 2

Thermal expansion is the tendency of matter to change in shape, area, and volume in response to a change in temperature. Temperature is a monotonic function of the average molecular kinetic energy of a substance. When a substance is heated, the kinetic energy of its molecules increases.


hopw u like it

folloe me for more help
: )