homework???

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The nutritional calorie (Calorie) is equivalent to 1 kcal. One pound of body fat is equivalent to about 4.1 103 Calories. If an athlete expends 1475 kJ/h, how long does she have to play to work off 1.0 lb of body fat?

2007-10-25 14:56:42 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

2 answers

1475kj/h*1000j/kj*1 cal/4.184J*4.1103lb/cal= answer

2007-10-25 15:10:17 · answer #1 · answered by Crazy and Lovin It 4 · 0⤊ 0⤋

Let's get our units in line
1 kJ= 4.17 kcal= 4.17 C

So exercise time = 4100C/(1.475kJ/hr*4.17C/kJ)= about 70 hours!?

2007-10-25 15:12:44 · answer #2 · answered by cattbarf 7 · 0⤊ 0⤋