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(315.8 , \textcm^2).

At (10^\circ C), a hole in a plate has area (50.00 , cm^2). At (110^\circ C), its area is (50.25 , cm^2). Find (\alpha) of the material. (Answer: (\approx 2.5 \times 10^-5 , ^\circ C^-1)) dilatacion superficial ejercicios resueltos