| ssm In exercising, a weight lifter loses 0.150 kg of water *7. through evaporation, the heat required to evaporate the water com- ing from the weight lifter's body. The work done in lifting weights is 1.40 x 10° J. (a) Assuming that the latent heat of vaporization of perspiration is 2.42 X 10° J/kg, find the change in the internal energy of the weight lifter. (b) Determine the minimum number of nutritional Calories of food (1 nutritional Calorie = 4186 J) that must be consumed to replace the loss of internal energy.

| ssm In exercising, a weight lifter loses 0.150 kg of water *7. through evaporation, the heat required to evaporate the water com- ing from the weight lifter's body. The work done in lifting weights is 1.40 x 10° J. (a) Assuming that the latent heat of vaporization of perspiration is 2.42 X 10° J/kg, find the change in the internal energy of the weight lifter. (b) Determine the minimum number of nutritional Calories of food (1 nutritional Calorie = 4186 J) that must be consumed to replace the loss of internal energy.

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter20: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 20.12OQ: If a gas is compressed isothermally, which of the following statements is true? (a) Energy is...

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