(1).A person radiates about 100 W while woking. How many calories of energy do they lose in an hours?
(2 ) What is the mechanical power in horsepower of 3000 cal/s?
(3) How many calories of energy are required to change 10g of ice at -10 *C to steam at 110 *C?
(4) Find the final temperature when 600g of copper at 80 *C are dropped into a 50g aluminum calorimeter containing 60g of water at 18 *C.