Question: A uniform rectangular plate of length/ and width w has coefficient of linear expansion a. Show that, if we neglect very small quantities, the change

A uniform rectangular plate of length/ and width w has coefficient of linear expansion a. Show that, if we neglect very small quantities, the change in area of the plate due to a temperature change ΔT is ΔA = 2alw ΔT. See Fig 13.30.

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