The nutritional calorie (Calorie) is equivalent to 1 kcal. One pound of body fat is equivalent to about 4.1 x 103 Calories.?

2016-10-29 2:01 am
The nutritional calorie (Calorie) is equivalent to 1 kcal. One pound of body fat is equivalent to about 4.1 x 103 Calories.

If a runner expends 1850 kJ/h, how long (h) does she have to run to work off 1.63 lb of body fat?

回答 (1)

2016-10-29 5:09 am
(1.63 lb) x (4.1 x 10^3 Cal/lb) x (1 kcal / 1 Cal) x (4184 J/kcal) / (1000 J/kJ) / (1850 kJ/h) = 15.1 h


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