1. A hockey puck has a gravitational potential energy of 2.3 J when it is held...

 

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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 350C is submerged in 300 g of water at 10C to be cooled quickly. Determine the final temperature of the iron and the water. A: 4 PART IV: THINKING / INQUIRY: 14 1. 160 g of molten silver at its melting point, 960C, 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-40C? 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 350C is submerged in 300 g of water at 10C to be cooled quickly. Determine the final temperature of the iron and the water. A: 4 PART IV: THINKING / INQUIRY: 14 1. 160 g of molten silver at its melting point, 960C, 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-40C?

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Explanation 1 The gravitational potential energy of an object is given by the formula PE mgh where m ... View the full answer