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Show that the coefficients of performance of refrigerators and heat pumps are related by

College Physics for AP® Courses | 1st Edition | ISBN: 9781938168932 | Authors: Gregg Wolfe, Irina Lyublinskaya, Douglas Ingram ISBN: 9781938168932 372

Solution for problem 46 Chapter 15

College Physics for AP® Courses | 1st Edition

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College Physics for AP® Courses | 1st Edition | ISBN: 9781938168932 | Authors: Gregg Wolfe, Irina Lyublinskaya, Douglas Ingram

College Physics for AP® Courses | 1st Edition

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Problem 46

Show that the coefficients of performance of refrigerators and heat pumps are related by COPref = COPhp 1 . Start with the definitions of the COP s and the conservation of energy relationship between Qh , Qc , and W .

Step-by-Step Solution:
Step 1 of 3

Dudaie 1 Physics II: Chapter 19­ Electric charges, Forces, and Fields “Like attracts like” 1. Electric charge a. There are 2 types of charges on any given objects i. Negative (­) = electron 1. All electrons have some defining intrinsi­19roperties a. electric charge­ ­e= 1.60 x 10 C b. mass­ M =e9.11 x 10 kg­31 ii. Positive (+) = proton ­19 1. electric charge­ ­e= 1.60­2710 C 2. mass­ M =p1.673 x 10 kg iii. Object with equal amounts of both charges have a zero net charge Neutral b. Conservation of electric charge i. The total electric charge of the universe is constant, no physical process can increase of decrease in the total amount of the electric charge in the universe; electric charge can only be transferred c. Polarization i. The ability of charged objects to attract small neutral objects 1. When a positively charged object is held near a neutral object the opposite charges are attract

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Chapter 15, Problem 46 is Solved
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Textbook: College Physics for AP® Courses
Edition: 1
Author: Gregg Wolfe, Irina Lyublinskaya, Douglas Ingram
ISBN: 9781938168932

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Show that the coefficients of performance of refrigerators and heat pumps are related by