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Under normal conditions the human heart converts about 13.0 J of chemical energy per second into 1.30 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

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Eduard22sly

The energy (in calories) required to power the heart for one day is 268.32 Cal

How to convert 1 day to seconds

1 day = 24 h

24 h = 24 × 60 = 1440 mins

1440 mins = 1440 × 60 = 86400 s

Thus,

1 day = 86400 s

How to determine the energy (in calories) for 1 day (86400 s)

From the question given,

1 s = 13 J

Therefore,

86400 s = 86400 × 13

86400 s = 1123200 J

Divide by 4186 to express in calories

86400 s = 1123200 / 4186

86400 s = 268.32 Cal

Thus, the energy needed to power the heart for 1 day is 268.32 Cal

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Complete question

Under normal conditions the human heart converts about 13.0 J of chemical energy per second into 1.30 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

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