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An inventor claims to have devised a cyclical engine for

Thermodynamics: An Engineering Approach | 8th Edition | ISBN:  9780073398174 | Authors: Yunus A. Cengel, Michael A. Boles ISBN: 9780073398174 56

Solution for problem 80P Chapter 6

Thermodynamics: An Engineering Approach | 8th Edition

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Thermodynamics: An Engineering Approach | 8th Edition | ISBN:  9780073398174 | Authors: Yunus A. Cengel, Michael A. Boles

Thermodynamics: An Engineering Approach | 8th Edition

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Problem 80P

Problem 80P

An inventor claims to have devised a cyclical engine for use in space vehicles that operates with a nuclear-fuel-generated energy source whose temperature is 920 R and a sink at 490 R that radiates waste heat to deep space. He also claims that this engine produces 4.5 hp while rejecting heat at a rate of 15,000 Btu/h. Is this claim valid?

Step-by-Step Solution:
Step 1 of 3

THE HEART OF THE MATTER ● the lighter chemical elements are the most abundant on earth ○ the heavier (gold) = more rare ● both space and time came out of the Big Bang ● string/loop of energy is the one basic particle ● gravity doesn’t fit or work well with quantum theory ● string theory = only theory so far that reconciles Quantum Theory and gravity ○ doesn’t mean that its correct ● each particle is a different note or vibration mode of the same elemental string ● one string can vibrate in different ways to produce a whole series of particles with wildly different properties ● as many as 7 extra dimensions and dozens of new particles must be added ● extra dimensions coiled up everywhere around us

Step 2 of 3

Chapter 6, Problem 80P is Solved
Step 3 of 3

Textbook: Thermodynamics: An Engineering Approach
Edition: 8
Author: Yunus A. Cengel, Michael A. Boles
ISBN: 9780073398174

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An inventor claims to have devised a cyclical engine for