Question

what is tharmal expansion , derive an expression for the linear or longitudianal expression.​

Answer 1

Answer:

Explanation: Linear thermal expansion is ΔL = αLΔT, where ΔL is the change in length L, ΔT is the change in temperature, and α is the coefficient of linear expansion, which varies slightly with temperature. The change in area due to thermal expansion is ΔA = 2αAΔT, where ΔA is the change in area.

Explanation:

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Answer 2

Answer:

Thermal expansion means that when there is alot of heat energy put on a substance the molecules of that substance get kinetic energy which results in Thermal expansion.