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Definitions of efficiency vary depending on how energy is

College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs ISBN: 9781938168000 42

Solution for problem 18CQ Chapter 15

College Physics | 1st Edition

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College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs

College Physics | 1st Edition

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Problem 18CQ

Definitions of efficiency vary depending on how energy is being converted. Compare the definitions of efficiency for the human body and heat engines. How does the definition of efficiency in each relate to the type of energy being converted into doing work?

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Solution 18CQ

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Step 1 of 2</p>

In an engine or a mechanical system, efficiency can be defined as the output power to the input power or the ratio of the word done to the energy supplied.

In a mechanical system such as an engine, the fuel is supplied, which gives heat energy as the input. The work done will be in terms of the process done by the engine as per its construction, such as rotating a loaded shaft or running a wheel at constant speed.

Step 2 of 2

Chapter 15, Problem 18CQ is Solved
Textbook: College Physics
Edition: 1
Author: Paul Peter Urone, Roger Hinrichs
ISBN: 9781938168000

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Definitions of efficiency vary depending on how energy is