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A 44-kg woman cheats on her diet and eats a 585-Calorie (585 kcal) jelly doughnut for...

A 44-kg woman cheats on her diet and eats a 585-Calorie (585 kcal) jelly doughnut for breakfast.

(a) How many joules of energy are the equivalent of one jelly doughnut?

________________

(b) How many stairs must the woman climb to perform an amount of mechanical work equivalent to the food energy in one jelly doughnut? Assume the height of a single stair is 15 cm.

___________ STAIRS

C)If the human body is only 24% efficient in converting chemical energy to mechanical energy, how many stairs must the woman climb to work off her breakfast?

___________STAIRS

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