Consider cyclic processes completely characterized by each of the following net energy inputs and outputs. In each case, the energy transfers listed are the only ones occurring. Classify each process as (a) possible, (b) impossible according to the first law of thermodynamics , (c) impossible according to the second law of thermodynamics, or (d) impossible according to both the first and second laws, (i) Input is 5 J of work, and output is 4 J of work. (ii) Input is 5 J of work, and output is 5 J of energy transferred by heat. (iii) Input is 5 J of energy transferred by electrical transmission, and output is 6 J of work. (iv) Input is 5 J of energy transferred by heat, and output is 5 J of energy transferred by heal. (v) Input is 5 J of energy transferred by heal, and output is 5J of work. (vi) Input is 5 J of energy transferred by beat, and output is 3 J of work plus 2 J of energy transferred by heat.
Consider cyclic processes completely characterized by each of the following net energy inputs and outputs. In each case, the energy transfers listed are the only ones occurring. Classify each process as (a) possible, (b) impossible according to the first law of thermodynamics , (c) impossible according to the second law of thermodynamics, or (d) impossible according to both the first and second laws, (i) Input is 5 J of work, and output is 4 J of work. (ii) Input is 5 J of work, and output is 5 J of energy transferred by heat. (iii) Input is 5 J of energy transferred by electrical transmission, and output is 6 J of work. (iv) Input is 5 J of energy transferred by heat, and output is 5 J of energy transferred by heal. (v) Input is 5 J of energy transferred by heal, and output is 5J of work. (vi) Input is 5 J of energy transferred by beat, and output is 3 J of work plus 2 J of energy transferred by heat.
Consider cyclic processes completely characterized by each of the following net energy inputs and outputs. In each case, the energy transfers listed are the only ones occurring. Classify each process as (a) possible, (b) impossible according to the first law of thermodynamics, (c) impossible according to the second law of thermodynamics, or (d) impossible according to both the first and second laws, (i) Input is 5 J of work, and output is 4 J of work. (ii) Input is 5 J of work, and output is 5 J of energy transferred by heat. (iii) Input is 5 J of energy transferred by electrical transmission, and output is 6 J of work. (iv) Input is 5 J of energy transferred by heat, and output is 5 J of energy transferred by heal. (v) Input is 5 J of energy transferred by heal, and output is 5J of work. (vi) Input is 5 J of energy transferred by beat, and output is 3 J of work plus 2 J of energy transferred by heat.
cyclic processes completely characterized byeach of the following net energy inputs and outputs.In each case, the energy transfers listed are the onlyones occurring. Classify each process as (a) possible,(b) impossible according to the first law of thermodynamics,(c) impossible according to the second law ofthermodynamics, or (d) impossible according to boththe first and second laws. (i) Input is 5 J of work, andoutput is 4 J of work. (ii) Input is 5 J of work, and outputis 5 J of energy transferred by heat. (iii) Input is5 J of energy transferred by electrical transmission, andoutput is 6 J of work. (iv) Input is 5 J of energy transferredby heat, and output is 5 J of energy transferred
A(n) 63-kg sprinter accelerates from rest to a speed of 11.0 m/s in 5.6 s.
(a) Calculate the mechanical work done by the sprinter during this time.
(b) Calculate the average power the sprinter must generate.
(c) If the sprinter converts food energy to mechanical energy with an efficiency of 25%, at what average rate is he burning Calories?
Cal/s
(d) What happens to the other 75% of the food energy being used?
(a) If the internal energy of a systemincreases as the result of an adiabatic process, is work done on thesystem or by the system? (b) Calculate the work done on or by thesystem in part (a) if its internal energy increases by 670 J
Chapter 22 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
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The Second Law of Thermodynamics: Heat Flow, Entropy, and Microstates; Author: Professor Dave Explains;https://www.youtube.com/watch?v=MrwW4w2nAMc;License: Standard YouTube License, CC-BY