A square hole 12.3 cm along each side is cut in a sheet of copper.Find the change in the area of this hole if the temperature of the sheet is increased by 60 K. The coefficient of expasion is 1.7 × 10?5 (?C)?1.Answer in units of cm2
The given coefficient of expansion is a coefficient of LINEAR expansion. So each edge of 12.3 cm expands to (12.3 cm)(1 + 60*1.7 x 10^(-5)) (12.3 cm)(1.00102) and the change in area is (12.3 cm)^2 (1.00102^2 - 1) 0.309 cm^2
