15. Convert 6 kWhs to BTUs Use proper form, show cancellations, and round to the nearest BTU, (hint: Use the definition

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15 Convert 6 Kwhs To Btus Use Proper Form Show Cancellations And Round To The Nearest Btu Hint Use The Definition 1 (44.27 KiB) Viewed 81 times

15. Convert 6 kWhs to BTUs Use proper form, show cancellations, and round to the nearest BTU, (hint: Use the definition of a Watt and also 1 BTU - 1055 Joules) a 2.05 x 10 BTU b. 3.48 x 10 BTU 6.2.66 x 10 BTU d. 6.55 x 10 BTU 1 16. Suppose a suspended mass of 586 kg moves downwards through a distance of 60 m as it turns a paddle wheel in 1 24 kilograms of water initially at a temperature of 2°C: How much will the temperature of the water increase if all the energy released by the falling mass is transfered to and remains in the water? (hint: Recall that Q - meat, and consider the change in potential energy of the talling mass, APE = mgåh, as the source of energy here, and that the heat capacity of water is 4156Joules/*C) a. 119 °c b. 146 °C c. 92.6 °C d. 66.2°C 17. Assuming that a human body climbs with an energy efficiency of 20%, how high a hill does a 177 lb hier need to climb to completely burn off a 400 (food) calorie meal? (hint: This involves the change in potential energy of the hiker, APE = mg Ah note that 1 kilograms weighs about 22 lbs, and that 1 dietary calorie contains 4186 Joules.) a 425 m b. 1.1 x 10m c. 212 m d. 637 m 18. How much heat must be added to 2 moles of an monatomic Ideal gas kept at a constant VOLUME to increase its temperature by 79 °C? a. 4.93 x 10' b. 1.97 * 10j c. 2.76 x 10 d. 1.18 x 10 19. How much heat must be added to 11 moles an monatomic ideal gas kept at a constant PRESSURE to increase its temperature by 60 ºc? a. 2.61 x 1041 b. 8.23 x 10J c. 2.06 x 10*J d. 1.37 x 10°