Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 1 - Introduction to Physics - Problems and Conceptual Exercises - Page 15: 2

Answer

a) 7 $\times 10^{-5}$ m b) 7 $\times 10^{-8}$ km

Work Step by Step

(a) We can convert the thickness of hair in meters as $1~\mu m=10^{-6}m$ $70~\mu m=70\times 10^{-6}$ $\implies 70\mu m=7.0\times 10^{-5}m$ (b) We know that $1~m=10^{-3}Km$ $\implies 70\mu m=70\times 10^{-6}\times 10^{-3}Km$ $70~\mu m=7.0\times 10^{-8}K m$
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