Question

what is thermal expansion ​

Answer 1

Answer:

Thermal expansion is the tendency of matter to change its shape, area, volume, and density in response to a change in temperature, usually not including phase transitions. Temperature is a monotonic function of the average molecular kinetic energy of a substance

Explanation:

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Answer 2

Answer :-

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

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