If the air temperature is the same as the temperature of your skin (about 30° C), your body cannot get rid of heat by transferring it to the air. In that case, it gets rid of the heat by evaporating water (sweat). During bicycling, typical 70 kg person's body produces energy at a rate of about 505 W due to metabolism, 76% of which is converted to heat. Part A How many kilograms of water must the person's body evaporate in an hour to get rid of this heat? The heat of vaporization of water at body temperature is 2.42 x 10° J/kg. Express your answer in kilograms. m = kg Submit Request Answer Part B The evaporated water must, of course, be replenished, or the person will dehydrate. How many 750 mL bottles of water must the bicyclist drink per hour to replenish the lost water? (Recall that the mass of a liter of wat is 1.0 kg.) Express your answer in bottles per hour. N = bottles per hour

If the air temperature is the same as the temperature of your skin (about 30° C), your body cannot get rid of heat by transferring it to the air. In that case, it gets rid of the heat by evaporating water (sweat). During bicycling, typical 70 kg person's body produces energy at a rate of about 505 W due to metabolism, 76% of which is converted to heat. Part A How many kilograms of water must the person's body evaporate in an hour to get rid of this heat? The heat of vaporization of water at body temperature is 2.42 x 10° J/kg. Express your answer in kilograms. m = kg Submit Request Answer Part B The evaporated water must, of course, be replenished, or the person will dehydrate. How many 750 mL bottles of water must the bicyclist drink per hour to replenish the lost water? (Recall that the mass of a liter of wat is 1.0 kg.) Express your answer in bottles per hour. N = bottles per hour

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter17: Energy In Thermal Processes: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 81P

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