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Chap 5 - 67

# Chap 5 - 67 - 5.67(a The person walking uses Eu =(220 kcal...

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Unformatted text preview: 5.67 (a) The person walking uses Eu, =(220 kcal)[%] =9.21>< 105 I of energy while going 3.00 miles The quantity of gasoline which could furnish this much energy is V: 921x105] 7. _3 '1 130x1081/g31= 08x10 gal Thismam"he“"-“‘°-""aﬂ<~‘—‘rsi‘ueleconomyin equivalent miles per gallon' 15 M W- 3 ——°“—~—- "“ =m - . 708x104 gal g (b) In 1 flour, the bicyclist travels 100 miles and uses 4186 I 5 kcal [— )— 1.67 10 , ”(400 ) 1 kcal x I which is equal to the energy aVailable in 1.67 x106 I V; =—3 1.30 x10 J/gal 10.0mi theb' chs' t _6m1/ a1 my 13 1—29x10'2 gal =— = 1.29 x 10‘2 gal of gasoline. This, the eqllivalent fuel economy for ...
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