16th Edition

ISBN: 9781323515303

Author: Knight

Publisher: PEARSON C

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Textbook Question

Chapter 11, Problem 61GP

The resistance of an exercise bike is often provided by a generator; that is, the energy that you expend is used to generate electric energy, which is then dissipated. Rather than dissipate the energy, it could be used for practical purposes.

a. A typical person can maintain a steady energy expenditure of 400 W on a bicycle. Assuming a typical efficiency for the body, and a generator that is 80% efficient, what useful electric power could you produce with a bicycle-powered generator?

b. How many people would need to ride bicycle generators simultaneously to power a 400 W TV in the gym?

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Chapter 11, Problem 60GP

Chapter 11, Problem 62GP

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Chapter 11 Solutions

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Ch. 11 - Rub your hands together vigorously. What happens?...Ch. 11 - Describe the energy transfers and transformations...Ch. 11 - According to Table 11.4, cycling at 15 km/h...Ch. 11 - Prob. 4CQ Ch. 11 - Prob. 5CQ Ch. 11 - For most automobiles, the number of miles per...Ch. 11 - Prob. 8CQ Ch. 11 - Prob. 9CQ Ch. 11 - Prob. 10CQ Ch. 11 - Prob. 11CQ

Ch. 11 - Prob. 12CQ Ch. 11 - For Questions 12 through 17, give a specific...Ch. 11 - For Questions 12 through 17, give a specific...Ch. 11 - For Questions 12 through 17, give a specific...Ch. 11 - For Questions 12 through 17, give a specific...Ch. 11 - For Questions 12 through 17, give a specific...Ch. 11 - For Questions 12 through 17, give a specific...Ch. 11 - Prob. 19CQ Ch. 11 - Prob. 20CQ Ch. 11 - Prob. 21CQ Ch. 11 - Prob. 22CQ Ch. 11 - Prob. 24CQ Ch. 11 - Prob. 25CQ Ch. 11 - Electric vehicles increase speed by using an...Ch. 11 - When the suns light hits the earth, the...Ch. 11 - Prob. 29CQ Ch. 11 - Prob. 30CQ Ch. 11 - Prob. 31CQ Ch. 11 - Prob. 32MCQ Ch. 11 - Prob. 33MCQ Ch. 11 - A person is walking on level ground at constant...Ch. 11 - A person walks 1 km, turns around, and runs back...Ch. 11 - 200 J of heat is added to two gases, each in a...Ch. 11 - Prob. 37MCQ Ch. 11 - A refrigerators freezer compartment is set at 10C;...Ch. 11 - A 10% efficient engine accelerates a 1500 kg car...Ch. 11 - Prob. 2P Ch. 11 - A typical photovoltaic cell delivers 4.0 103 W of...Ch. 11 - Prob. 4P Ch. 11 - Prob. 5P Ch. 11 - Prob. 6P Ch. 11 - In an average human, basic life processes require...Ch. 11 - Prob. 8P Ch. 11 - An energy bar contains 22 g of carbohydrates. How...Ch. 11 - Prob. 10P Ch. 11 - Prob. 11P Ch. 11 - Prob. 12P Ch. 11 - An energy bar contains 22 g of carbohydrates. If...Ch. 11 - Prob. 14P Ch. 11 - Prob. 15P Ch. 11 - Prob. 16P Ch. 11 - The label on a candy bar says 400 Calories....Ch. 11 - Prob. 18P Ch. 11 - A weightlifter curls a 30 kg bar, raising it each...Ch. 11 - Prob. 20P Ch. 11 - Prob. 21P Ch. 11 - Prob. 22P Ch. 11 - Suppose your body was able to use the chemical...Ch. 11 - Prob. 24P Ch. 11 - Prob. 25P Ch. 11 - Prob. 26P Ch. 11 - Prob. 27P Ch. 11 - The planet Mercurys surface temperature varies...Ch. 11 - A piece of metal at 100C has its Celsius...Ch. 11 - Prob. 30P Ch. 11 - 500 J of work are done on a system in a process...Ch. 11 - Prob. 32P Ch. 11 - 600 J of heat energy are transferred to a system...Ch. 11 - 10 J of heat are removed from a gas sample while...Ch. 11 - A heat engine extracts 55 kJ from the hot...Ch. 11 - A heat engine does 20 J of work while exhausting...Ch. 11 - A power plant running at 35% efficiency generates...Ch. 11 - A heat engine operating between energy reservoirs...Ch. 11 - A newly proposed device for generating electricity...Ch. 11 - Prob. 41P Ch. 11 - Prob. 42P Ch. 11 - Prob. 43P Ch. 11 - Prob. 44P Ch. 11 - A refrigerator takes in 20 J of work and exhausts...Ch. 11 - Air conditioners are rated by their coefficient of...Ch. 11 - 50 J of work are done on a refrigerator with a...Ch. 11 - Prob. 48P Ch. 11 - Find the maximum possible coefficient of...Ch. 11 - Prob. 50P Ch. 11 - Prob. 51P Ch. 11 - Prob. 52P Ch. 11 - Prob. 53P Ch. 11 - Prob. 55GP Ch. 11 - Prob. 56GP Ch. 11 - The record time for a Tour de France cyclist to...Ch. 11 - Championship swimmers take about 22 s and about 30...Ch. 11 - A 68 kg hiker walks at 5.0 km/h up a 7% slope....Ch. 11 - To make your workouts more productive, you can get...Ch. 11 - The resistance of an exercise bike is often...Ch. 11 - Prob. 62GP Ch. 11 - Prob. 63GP Ch. 11 - An engine does 10 J of work and exhausts 15 J of...Ch. 11 - An engine operating at maximum theoretical...Ch. 11 - An engineer claims to have measured the...Ch. 11 - A typical coal-fired power plant burns 300 metric...Ch. 11 - Prob. 68GP Ch. 11 - Air conditioners sold in the United States are...Ch. 11 - The surface waters of tropical oceans are at a...Ch. 11 - The light energy that falls on a square meter of...Ch. 11 - Prob. 72MSPP Ch. 11 - Prob. 73MSPP Ch. 11 - Prob. 74MSPP Ch. 11 - Prob. 75MSPP Ch. 11 - Prob. 76MSPP Ch. 11 - Prob. 77MSPP Ch. 11 - Prob. 78MSPP Ch. 11 - Prob. 79MSPP

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