Question: (a) If an area measured on the surface of a solid body is Ao at some initial temperature and then changes by M when the

(a) If an area measured on the surface of a solid body is Ao at some initial temperature and then changes by M when the temperature changes by ΔT, show that

Where a is the coefficient of linear expansion.
(b) A circular sheet of aluminum is 55.0 cm in diameter at 15.0°C. By how much does the area of one side of the sheet change when the temperature increases to 27.5°C?

AA = (2a) AgA7T

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