Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Part 1 - Multiple-Choice Practice Exam: 21

Answer

40%.

Work Step by Step

The efficiency is the useful energy output (40 J) divided by the total energy input (100 J). This is discussed on page 121.
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