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Get Full Access to Physics: Principles With Applications - 6 Edition - Chapter 7 - Problem 51pe
Get Full Access to Physics: Principles With Applications - 6 Edition - Chapter 7 - Problem 51pe

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snow can be extremely taxing because the arms have such a

ISBN: 9780130606204 3

Solution for problem 51PE Chapter 7

Physics: Principles with Applications | 6th Edition

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Physics: Principles with Applications | 6th Edition

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Problem 51PE

snow can be extremely taxing because the arms have such a low efficiency in this activity. Suppose a person shoveling a footpath metabolizes food at the rate of 800 W. (a) What is her useful power output? (b) How long will it take her to lift 3000 kg of snow 1.20 m? (This could be the amount of heavy snow on 20 m of footpath.) (c) How much waste heat transfer in kilojoules will she generate in the process?

Step-by-Step Solution:

Step-by-step solution Step 1 of 7 The formula to find the efficiency is, Here is the efficiency, is the output power and is the input power.

Step 2 of 7

Step 3 of 7

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