College Physics
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ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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9.
Tectonic plates are large segments of the Earth’s crust that move slowly. Suppose that one such plate has an average speed of 4.0 cm/year. (a) What distance does it move in 1 s at this speed? (b) What is its speed in kilometers per million years?
15.
(a) Suppose that a person has an average heart rate of 72.0 beats/min. How many beats does he or she have in 2.0 y? (b) In 2.00 y? (c) In 2.000 y?
19.
(a) If your speedometer has an uncertainty of 2.0km/hsize 12{2 "." 0" km/h"} {} at a speed of 90km/hsize 12{"90"" km/h"} {}, what is the percent uncertainty? (b) If it has the same percent uncertainty when it reads 60km/hsize 12{"60"" km/h"} {}, what is the range of speeds you could be going?
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