a. Explanation Given data: Device efficiency is 60%, and Electric energy is 600 J. Formula used: Write the expression for efficiency ( e ) . e = electric energy chemical energy (1) Rearrange equation (1). chemical energy = electric energy e Substitute 600 J for electric energy and 60% for e , chemical energy = 600 b. To determine To find: The efficiency.

College Physics: A Strategic Approach (3rd Edition)

3rd Edition

ISBN: 9780321879721

Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field

Publisher: PEARSON

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.

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Chapter 11, Problem 2P

To determine

To find: How much chemical energy is used to generate 600 J of electric energy.

To determine

To find: The efficiency.

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Chapter 11, Problem 1P

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Chapter 11 Solutions

College Physics: A Strategic Approach (3rd Edition)

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How much chemical energy is used to generate 600 J of electric energy.

Solution Summary: The author explains how chemical energy is used to generate 600 J of electric energy.

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To find: How much chemical energy is used to generate 600 J of electric energy.

To find: The efficiency.

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Chapter 11 Solutions