College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

تمرين 7

(a) When cooled, the densities of most objects (1) increase, (2) decrease, (3) stay the same. (b) By what percentage does the density of a bowling ball change (assuming it is a uniform sphere) when it is taken from room temperature (68°F) into the cold night air in Nome, Alaska ( 40°F). Assume the ball is made out of a material that has a linear coefficient of expansion a of 75.2 × 10 6 /°C.