College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 1 - Measurement and Problem Solving - Learning Path Questions and Exercises - Exercises - Page 30: 49

Answer

$a). cm$ $b). 0.946 m^{2}$

Work Step by Step

a). 1 m = 100 cm, So, 1.245 m = 124.5 cm, and 0.760 m = 76 cm. The last digit 5 in 124.5 cm indicates that it is an estimated value. So, the smallest division of the instrument is cm. b). Area of the table top = $1.245 m \times 0.760 m = 0.946 m^{2}$ Since, 0.760 has the least number of significant figures which is 3, the answer should be also with 3 significant figures.
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