A person in good physical condition can put out 100 W of

College Physics by Urone | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone

Problem 32PE Chapter 7

College Physics by Urone | 1st Edition

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College Physics by Urone | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone

College Physics by Urone | 1st Edition

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Problem 32PE

A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time: (a) How many people would it take to run a 4.00-kW electric clothes dryer? (b) How many people would it take to replace a large electric power plant that generates 800 MW?

Step-by-Step Solution:

Solution 32PE

Step 1 az

We have to calculate the number of persons required to run  clothes dryer and the number of persons required to replace a large power plant which outputs a power of .

Given data:

The power output of a person,

Power requirement of clothes dryer,

Power output of a large electric generator,

Step 2 az

The number of persons needed to run a clothes dryer:

The power output of a person,

Power requirement of clothes dryer,

The ratio of power outputs is

Thus it requires 40 persons with same power output power to work together to run clothes dryer of

Step 3 of 3

Chapter 7, Problem 32PE is Solved
Textbook: College Physics by Urone
Edition: 1st
Author: Paul Peter Urone
ISBN: 9781938168000

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