Suppose a man metabolizes 12000 kJ of food energy in one day. How much more work can a 187-W (0.250-horsepower) motor do, as compared with this person over the same time interval?
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Given: Power of man = 12000 kJ/day Show more…
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(a) What is the average metabolic rate in watts of a man who metabolizes $10,500 \mathrm{kJ}$ of food energy in one day? (b) What is the maximum amount of work in joules he can do without breaking down fat, assuming a maximum efficiency of $20.0 \% ?(\mathrm{c})$ Compare his work output with the daily output of a 187-W (0.250-horsepower) motor.
(a) What is the average metabolic rate in watts of a man who metabolizes 10,500 kJ of food energy in one day? (b) What is the maximum amount of work in joules he can do without breaking down fat, assuming a maximum efficiency of 20.0%? (c) Compare his work output with the daily output of a 187-W (0.250-horsepower) motor.
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