In terms of saving energy, bicycling and walking are far more efficient means of transportation than is travel by automobile. For example, when riding at 10,5 mi/h, a cyclist uses food energy at a rate of about 400 kcal/h above what he would use if he were merely sitting still. (In exercise physiology, power is often measured in kcal/h rather than in watts. Here, 1 kcal = 1 nutritionist's Calorie = 4,186 J.) Walking at 3.36 mi/h requires about 220 kcal/h. It is interesting to compare these values with the energy consumption required for travel by car. Gasoline yields about 1.30 x 10 3/gal. (a) Find the fuel economy in equivalent miles per gallon for a person walking. mpg (b) Find the fuel economy in equivalent miles per gallon for a person bicycling. mpg

College Physics
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ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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In terms of saving energy, bicycling and walking are far more efficient means of transportation than is travel by automobile. For example, when riding at 10,5 mi/h, a cyclist uses food
energy at a rate of about 400 kcal/h above what he would use if he were merely sitting still. (In exercise physiology, power is often measured in kcal/h rather than in watts. Here,
1 kcal = 1 nutritionist's Calorie = 4,186 ).) Walking at 3.36 mi/h requires about 220 kcal/h. It is interesting to compare these values with the energy consumption required for travel by
car. Gasoline yields about 1.30 x 10 J/gal.
(a) Find the fuel economy in equivalent miles per gallon for a person walking.
mpg
(b) Find the fuel economy in equivalent miles per gallon for a person bicydling.
mpg
Transcribed Image Text:In terms of saving energy, bicycling and walking are far more efficient means of transportation than is travel by automobile. For example, when riding at 10,5 mi/h, a cyclist uses food energy at a rate of about 400 kcal/h above what he would use if he were merely sitting still. (In exercise physiology, power is often measured in kcal/h rather than in watts. Here, 1 kcal = 1 nutritionist's Calorie = 4,186 ).) Walking at 3.36 mi/h requires about 220 kcal/h. It is interesting to compare these values with the energy consumption required for travel by car. Gasoline yields about 1.30 x 10 J/gal. (a) Find the fuel economy in equivalent miles per gallon for a person walking. mpg (b) Find the fuel economy in equivalent miles per gallon for a person bicydling. mpg
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