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Physics: Principles with Applications | 6th Edition | ISBN: 9780130606204 | Authors: Douglas C. Giancoli
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An ideal refrigerator-freezer operates with a COP = 7.0 in

Chapter 22, Problem 30P

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QUESTION:

Problem 30P

An ideal refrigerator-freezer operates with a COP = 7.0 in a 24°C room. What is the temperature inside the freezer?

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QUESTION:

Problem 30P

An ideal refrigerator-freezer operates with a COP = 7.0 in a 24°C room. What is the temperature inside the freezer?

ANSWER:

SolutionStep 1 of 6Intensity of a EM waves is the energy transmitted per unit area perpendicular to thedirection of propagation per unit time.Since energy per unit time is given by power.The intensity can be defined as the power radiated per unit area perpendicular to thedirection of propagation.That is P I = ASince area is given by, A=4r 2Using in above equation, P I = 4r2……………...1Where I is the intensity, P is the power and r is the radius.

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