Question

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Define thermal expension ??​

Answer 1

Answer:

Thermal expansion is defined as increase in the dimensions of the matter due to heat.

There are three types of expansion:-

(1)   Linear expansion (Δl) − Expansion of length

(2)   Area expansion (ΔA) − Expansion in area

(3)   Volume expansion (ΔV) − Expansion in complete volume of body

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Answer 2

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Thermal expansion is the tendency of matter to change its 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.

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