1.4: Thermal Expansion - Physics LibreTexts
https://phys.libretexts.org/Bookshelves/University_Physics/University_Physics_(OpenStax)/Book%3A_University_Physics_II_-_Thermodynamics_Electricity_and_Magnetism_(OpenStax)/01%3A_Temperature_and_Heat/1.04%3A_Thermal_Expansion
WebSep 12, 2022 · Definition: Thermal Expansion in Two Dimensions. For small temperature changes, the change in area ΔA is given by. ΔA = 2αAΔT. where ΔA is the range area A, ΔT is the change in temperature, and α is the coefficient of linear expansion, which varies slightly with temperature.
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