A 5 1 - kg woman eats a 5 7 1 Calorie ( 5 7 1 kcal
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Question:
A kg woman eats a Calorie kcal jelly doughnut for breakfast.
a How many joules of energy are the equivalent of one jelly doughnut?
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b How many steps must the woman climb on a very tall stairway to change the gravitational potential energy of the womanEarth system by a value equivalent to the food energy in one jelly doughnut? Assume the height of a single stair is cm
stairs
c If the human body is only efficient in converting chemical potential energy to mechanical energy, how many steps must the woman climb to work off her breakfast?
Related Book For
Cambridge International AS And A Level Chemistry Coursebook
ISBN: 9781316637739
2nd Edition
Authors: Lawrie Ryan, Roger Norris
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