Concept explainers
Rank the efficiency of these machines from highest to lowest:
(A) energy in 100 J; energy out 60 J
(B) energy in 100 J; energy out 50 J
(C) energy in 200 J; energy out 80 J
(D) energy in 200 J; energy out 120 J
To rank:The efficiency of the machines from greatest to least.
Answer to Problem 30A
The rank of efficiency of the machines from greatest to least is
Explanation of Solution
Given:
The given specifications for machines are:
Formula used.
The expression for the efficiency is,
Calculation:
The efficiency for case A is,
The efficiency for case B is,
The efficiency for case C is,
The efficiency for case D is,
By comparing the values of the efficiency of these machines is
Conclusion:
Thus, the rank of the efficiency of these machines from greatest to least is
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