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Choose the BEST answer to the following:When 100 J are put

Chapter 20, Problem 21MCP

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QUESTION:

Choose the BEST answer to each of the following:

When 100 J are put into a device that puts out 40 J of useful work, the efficiency of the device is

(a) 40%.      (b) 50%.      (c) 60%.      (d) 140%.

Questions & Answers

QUESTION:

Choose the BEST answer to each of the following:

When 100 J are put into a device that puts out 40 J of useful work, the efficiency of the device is

(a) 40%.      (b) 50%.      (c) 60%.      (d) 140%.

ANSWER:

Step 1 of 2

Answer : (a) 40%

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