CHAPTER 1 - 4 - 30....

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30. We assume the distance from Beijing to Paris is 10,000 mi. ( a ) If we assume that today’s race car can travel for an extended period at an average speed of  40 mi/h, we have time = [(10,000 mi)/(40 mi/h)](1 day/24 h) ˜         10 days . ( b ) If we assume that in 1906 a race car could travel for an extended period at an average speed of  5 mi/h, we have time = [(10,000 mi)/(5 mi/h)](1 day/24 h) ˜         80 days . 31. We assume that each dentist sees 10 patients/day, 5 days/wk for 48 wk/yr, for a total number of  visits of N visits  = (10 visits/day)(5 days/wk)(48 wk/yr) ˜ 2400 visits/yr. We assume that each person sees a dentist 2 times/yr. ( a ) We assume that the population of San Francisco is 700,000.  We let the units lead us to the answer: N  = (700,000)(2 visits/yr)/(2400 visits/yr) ˜        600 dentists . ( b
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This note was uploaded on 03/08/2010 for the course PHY 7A taught by Professor Zettl during the Fall '08 term at University of California, Berkeley.

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CHAPTER 1 - 4 - 30....

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