In exercising, a weight lifter loses 0.150 kg of water
Chapter , Problem 7(choose chapter or problem)
In exercising, a weight lifter loses 0.150 kg of water through evaporation, the heat required to evaporate the water coming from the weight lifters body. The work done in lifting weights is 1.40 3 105 J. (a) Assuming that the latent heat of vaporization of perspiration is 2.42 3 106 J/kg, fi nd the change in the internal energy of the weight lifter. (b) Determine the minimum number of nutritional Calories of food (1 nutritional Calorie 5 4186 J) that must be consumed to replace the loss of internal energy
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