Under normal conditions the human heart converts about 12.4 J of chemical energy per second into 1.24 W of mechanical power as it pumps blood throughout the body.   (a) Determine the number of Calories required to power the heart for one day, given that 1 Calorie equals 4186 J.   (b) Metabolizing 1 kg of fat can release about 9000 Calories of energy. What mass of metabolized fat (in kg) would power the heart for one day?

College Physics
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ISBN:9781305952300
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Chapter1: Units, Trigonometry. And Vectors
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Under normal conditions the human heart converts about 12.4 J of chemical energy per second into 1.24 W of mechanical power as it pumps blood throughout the body.
 
(a)
Determine the number of Calories required to power the heart for one day, given that 1 Calorie equals 4186 J.
 
(b)
Metabolizing 1 kg of fat can release about 9000 Calories of energy. What mass of metabolized fat (in kg) would power the heart for one day?
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