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14 Level 7-8: In times past, on a cold winter night, it was common to bring a hot object to bed with you. Which would keep you warmer through the cold night-a 10-kg iron brick or a 10-kg jug of hot water at the same temperature? Explain. Enter your answer
15 Level 7-8 A camper pours 500 g of coffee, initially in a pot at 80 oC, into a 110-9 aluminum cup initially at 30 oC. What is the final temperature? Assume that coffee has the same specific heat as water and that no heat is exchanged with the surroundings. (cwater=4.18 J/goC) * Enter your answer
16 Level 7-8 A 150 g sample of brass at 90.0 degrees Celsius is placed in a calorimeter cup that contains 230 g of water at 20.0 degrees Celsius. Disregard the absorption of heat by the cup and calculate the final temperature of the brass and water. Specific heat of water = 4.18 J/gC, specific heat of brass=0.380 J/gC. Enter your answer