College Physics

2nd Edition

ISBN: 9780134601823

Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan

Publisher: Pearson,

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Chapter 15, Problem 22CQ

Why does covering a keg of beer with wet towels on a warm day help keep the beer cool?

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Chapter 15, Problem 21CQ

Chapter 15, Problem 23CQ

Chapter 15 Solutions

College Physics

Ch. 15 - Review Question 15.1 Imagine that a balloon...Ch. 15 - Prob. 2RQ Ch. 15 - Prob. 3RQ Ch. 15 - Review Question 15.4 Describe two situations in...Ch. 15 - Prob. 5RQ Ch. 15 - Review Question 15.6 Why are the units for...Ch. 15 - Prob. 7RQ Ch. 15 - An ideal gas in a container is separated with a...Ch. 15 - 2. A container of gas has a movable piston, which...Ch. 15 - Prob. 3MCQ

Ch. 15 - Prob. 4MCQ Ch. 15 - 5. How much heat is stored in 10 kg of water at...Ch. 15 - We define the specific heat of a material as the...Ch. 15 - Prob. 7MCQ Ch. 15 - Figure Q15.8 shows a P-versus-V graph for two...Ch. 15 - 9. An electric heater is keeping the inside of a...Ch. 15 - Match each heating mechanism (left column) with a...Ch. 15 - 11. Your friend says, "Heat rises." Do you agree...Ch. 15 - Suggest practical ways for determining the...Ch. 15 - Suggest practical ways to measure heats of melting...Ch. 15 - Prob. 14CQ Ch. 15 - 15. Why does an egg take the same time interval to...Ch. 15 - Why does food cook faster in a pressure cooker...Ch. 15 - A potato into which several nails have been pushed...Ch. 15 - Explain why double-paned windows help reduce...Ch. 15 - 19. The water in a paper cup can be boiled by...Ch. 15 - Provide two reasons why blowing across hot soup or...Ch. 15 - 21. Placing a moistened finger in the wind can...Ch. 15 - Why does covering a keg of beer with wet towels on...Ch. 15 - 23. Explain why dogs can cool themselves by...Ch. 15 - 24. Some houses are heated by hot oil or water...Ch. 15 - If on a hot summer day you place one bare foot on...Ch. 15 - 26. A woman has a cup of hot coffee and a small...Ch. 15 - * EST Estimate the thermal energy of the air in...Ch. 15 - A balloon of volume 0.010 m3 is filled with 1.0...Ch. 15 - * Imagine that the helium balloon from the...Ch. 15 - 4. *You accidentally release a helium-filled...Ch. 15 - * Helium in a cylinder with a piston and initially...Ch. 15 - Prob. 7P Ch. 15 - 8. * Jeopardy problem A gas process is described...Ch. 15 - 9. * Jeopardy problem A gas process is described...Ch. 15 - 10. Use the first law of thermodynamics to devise...Ch. 15 - Prob. 11P Ch. 15 - Prob. 12P Ch. 15 - Prob. 13P Ch. 15 - 14 *You are making a table for specific heats of...Ch. 15 - Prob. 15P Ch. 15 - 16. * BIO EST Body temperature change A drop in...Ch. 15 - 17. * BIO Temperature change of a person A 50-kg...Ch. 15 - Determine the amount of thermal energy provided by...Ch. 15 - 19. EST Estimate the time interval required for a...Ch. 15 - Prob. 20P Ch. 15 - * BIO Exercising warms body A 50-kg woman...Ch. 15 - Prob. 22P Ch. 15 - * You add 20C water to 0.20 kg of 40C soup After a...Ch. 15 - BIO Cooling a hot child A 30-kg child has a...Ch. 15 - Prob. 25P Ch. 15 - 26. * You pour 250 g of tea into a Styrofoam cup,...Ch. 15 - Prob. 27P Ch. 15 - Prob. 28P Ch. 15 - 29. Determine the energy needed to change a...Ch. 15 - 30. * When of energy is removed from 0.60 kg of...Ch. 15 - Prob. 31P Ch. 15 - C that must be added to a cup with 250 g of tea at...Ch. 15 - An ice-making machine removes thermal energy from...Ch. 15 - Prob. 34P Ch. 15 - Prob. 35P Ch. 15 - 36. How much energy is required to convert (a)...Ch. 15 - 37. Cooling with alcohol rub During a back rub, 80...Ch. 15 - 38. Energy in a lightning flash A lightning flash...Ch. 15 - 39 A kettle containing 0.75 kg of boiling water...Ch. 15 - Prob. 40P Ch. 15 - * EST Energy changes when it rains Estimate the...Ch. 15 - 42. * Insulating a house You insulate your house...Ch. 15 - C and the outside temperature is -10C?Ch. 15 - Prob. 44P Ch. 15 - 45. While blowing across the bowl of soup in the...Ch. 15 - Prob. 46P Ch. 15 - BIO Marathon You are training for a marathon While...Ch. 15 - Prob. 48P Ch. 15 - 49. * A canteen is covered with wet canvas. If 15...Ch. 15 - * EST Evaporative cooling Each year a layer of...Ch. 15 - Prob. 51P Ch. 15 - BIO Tree leaf A tree leaf of mass of 0.80 g and...Ch. 15 - Warming a spaceship Your friend says that natural...Ch. 15 - Prob. 54P Ch. 15 - Which is less dense: dry or wet air? Explain your...Ch. 15 - * BIO Losing liquid while running While running,...Ch. 15 - Prob. 57P Ch. 15 - 58. ** EST Global climate change Assume that...Ch. 15 - Prob. 59P Ch. 15 - * Standard house 2 On the same day in the same...Ch. 15 - * Standard house 3 Suppose that the following...Ch. 15 - Prob. 62P Ch. 15 - ** BIO EST Metabolism warms bedroom Because of its...Ch. 15 - Prob. 65GP Ch. 15 - * EST House ventilation For purposes of...Ch. 15 - Prob. 67GP Ch. 15 - ** EST Heating an event center with metabolic...Ch. 15 - Prob. 70RPP Ch. 15 - Prob. 71RPP Ch. 15 - Prob. 72RPP Ch. 15 - Prob. 73RPP Ch. 15 - Prob. 74RPP Ch. 15 - Prob. 75RPP Ch. 15 - Prob. 76RPP Ch. 15 - Prob. 77RPP Ch. 15 - Prob. 78RPP Ch. 15 - Prob. 79RPP Ch. 15 - Prob. 80RPP

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