Ch11_TestBank - Chapter 11, Energy in Thermal Processes...

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Chapter 11, Energy in Thermal Processes 152 C HAPTER 11 11.1 Heat and Internal Energy 11.2 Specific Heat 1. Arrange from smallest to largest: the BTU, the joule, and the calorie. a. BTU, J, cal b. J, cal, BTU c. cal, BTU, J d. J, BTU, cal 2. Of the following systems, which contains the most heat? a. 100 kg of water at 80°C b. 250 kg of water at 40°C c. 600 kg of ice at 0°C d. Systems do not contain heat. 3. Heat flow occurs between two bodies in thermal contact when they differ in what property? a. mass b. specific heat c. density d. temperature 4. Calories of the food type are equal to which of the following? a. 4.186 J b. 4 186 J c. 1 BTU d. 1054 J 5. Who demonstrated that when heat is gained or lost by a system during some process, the gain or loss can be accounted for by an equivalent quantity of mechanical work done on the system? a. Joule b. Boltzmann c. Thompson, Count Rumford d. Kelvin
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Chapter 11, Energy in Thermal Processes 153 6. The first experiment, which systematically demonstrated the equivalence of mechanical energy and heat, was performed by: a. Joule. b. Boltzmann. c. Thompson, Count Rumford. d. Kelvin. 7. If heat is flowing from a table to a block of ice moving across the table, which of the following must be true? a. The table is rough and there is friction between the table and ice. b. The ice is cooler than the table. c. The ice is changing phase. d. All three are possible, but none is absolutely necessary. 8. How many calories are equal to one BTU? (One calorie = 4.186 J, one BTU = 1 054 J.) a. 0.252 b. 3.97 c. 252 d. 397 9. Which of the following statements is true? a. A hot object contains a lot of heat. b. A cold object contains only a little heat. c. Objects do not contain heat. d. Statements a and b are true. 10. A 10-kg piece of aluminum (which has a specific heat of 900 J/kg ⋅° C) is warmed so that its temperature increases by 5.0 C ° . How much heat was transferred into it? a. 4.5 × 10 4 J b. 9.0 × 10 4 J c. 1.4 × 10 5 J d. 2.0 × 10 5 J 11. Sea breezes that occur near the shore are attributed to a difference between land and water with respect to what property? a. mass density b. coefficient of volume expansion c. specific heat d. emissivity
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Chapter 11, Energy in Thermal Processes 154 12. On a sunny day at the beach, the reason the sand gets so hot and the water stays relatively cool is attributed to the difference in which property between water and sand? a. mass density b. specific heat c. temperature d. thermal conductivity 13. Marc attaches a falling 500-kg object with a rope through a pulley to a paddle wheel shaft. He places the system in a well-insulated tank holding 25 kg of water. When the object falls, it causes the paddle wheel to rotate and churn the water. If the object falls a vertical distance of 100 m at constant speed, what is the temperature change of the water? (1 kcal = 4 186 J, the specific heat of water is 4 186 J/kg ⋅° C, and g = 9.8 m/s 2 ) a. 19 600 C ° b. 4 700 C ° c. 4.7 C °
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This note was uploaded on 02/23/2010 for the course PHY 2043 taught by Professor Isac during the Fall '09 term at University of Florida.

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Ch11_TestBank - Chapter 11, Energy in Thermal Processes...

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