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(solution) CHAPTER 1 – PROBLEMS 1. You have been asked to do a metabolism (energy) analysis of a person. How


CHAPTER 1 – PROBLEMS 1. You have been asked to do a metabolism (energy) analysis of a person. How would you define the system for this purpose? What type of system is this? Document Preview: CHAPTER 1 – PROBLEMS 1. You have been asked to do a metabolism (energy) analysis of a person. How would you define the system for this purpose? What type of system is this? 2. You are trying to understand how a reciprocating air compressor (piston-cylinder device) works. What system would you use? What type of a system is this? 3. How might you define a system to study the depletion of ozone in the upper layers of the earth's atmosphere? 4. How would you define a system to determine the rate at which an automobile adds carbon dioxide to the atmosphere? 5. How would you define a system to determine the temperature rise created in a lake when a portion of its water is used to cool a nearby electrical power plant? 6. Is the weight of a system an extensive or intensive property? 7. The specific weight, g, of a system is defined as the weight per unit volume (note that this definition violates the normal definition for specific properties). Is the specific weight an extensive or intensive system property? 8. Is the number of moles of a substance contained in a system an extensive or intensive system property? 9. The molar specific volume of a system is defined as the ratio of the volume of a system to the number of moles of substance contained in the system. Is this an extensive or intensive property? 10. How would you describe the state of the air in the atmosphere? What kind of a process does this air undergo from the cool morning to a warm afternoon? 11. How would you describe the state of the water in a bathtub? How would you describe the process the water undergoes as it cools? 12. Is gc necessary in the SI unit system? If it is required, what are its units and magnitude? 13. A man weighs 180 lbf at a location where g = 32.10 ft/s2. Determine his weight on the moon where g = 5.4 ft/s2. 14. If the mass of an object is 10 lbm, what is its weight at a location where g = 32.0 ft/s2? (9.95 lbf) 15. A lunar exploration module weighs 4000N at a location where g = 9.8 m/s2....

 


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