NAME UNIT TEST: WORK, ENERGY & POWER SPH3UO PART III: APPLICATION: /6 1. A hockey puck has a gravitational potential energy of 2.3 J when it is held by a referee at a height of 1.4 m above the rink surface. What is the mass of the puck? A: 2 2. A 200-g piece of iron at 350 C is submerged in 300 g of water at 10 C to be cooled quickly. Determine the final temperature of the iron and the water. A: 4 PART IV: THINKING / INQUIRY: 1. 160 g of molten silver at its melting point, 960 C, is allowed to solidify at the same temperature and gives out 16 800 J of heat. (a) Calculate the Latent heat of silver? (b) If the specific heat capacity of silver is 230 Jkg-1K-1. how much additional heat does it give out on cooling to-40 C