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Problem 19.23 9 of 16 Constants I Periodic Table In a hot day's race, a bicyclist consumes 7.2 L of water over the span of 3.5 hours. Part A Making the approximation that all of the cyclist's energy goes into evaporating this water as sweat, how much energy in kcal did the rider use during the ride? (Since the efficiency of the rider is only about 20%, most of the energy consumed does go to heat, so our approximation is not far off.) Assume that the heat of vaporization at room temperature is 585 kcal/kg. Express your answer using two significant figures. Πν ΑΣφ Q = 840 kcal Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining

Problem 19.23 9 of 16 Constants I Periodic Table In a hot day's race, a bicyclist consumes 7.2 L of water over the span of 3.5 hours. Part A Making the approximation that all of the cyclist's energy goes into evaporating this water as sweat, how much energy in kcal did the rider use during the ride? (Since the efficiency of the rider is only about 20%, most of the energy consumed does go to heat, so our approximation is not far off.) Assume that the heat of vaporization at room temperature is 585 kcal/kg. Express your answer using two significant figures. Πν ΑΣφ Q = 840 kcal Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Problem 19.23 9 of 16 Constants I Periodic Table In a hot day's race, a bicyclist consumes 7.2 L of water over the span of 3.5 hours. Part A Making the approximation that all of the cyclist's energy goes into evaporating this water as sweat, how much energy in kcal did the rider use during the ride? (Since the efficiency of the rider is only about 20%, most of the energy consumed does go to heat, so our approximation is not far off.) Assume that the heat of vaporization at room temperature is 585 kcal/kg. Express your answer using two significant figures. Πν ΑΣφ Q = 840 kcal Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining
Transcribed Image Text:Problem 19.23 9 of 16 Constants I Periodic Table In a hot day's race, a bicyclist consumes 7.2 L of water over the span of 3.5 hours. Part A Making the approximation that all of the cyclist's energy goes into evaporating this water as sweat, how much energy in kcal did the rider use during the ride? (Since the efficiency of the rider is only about 20%, most of the energy consumed does go to heat, so our approximation is not far off.) Assume that the heat of vaporization at room temperature is 585 kcal/kg. Express your answer using two significant figures. Πν ΑΣφ Q = 840 kcal Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining
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