# Chapter 1 - General Principles - Problems - Page 15: 14

a) $44.9(10^-3)N^2$ b) $2.79(10^3)s^2$ a) $23.4s$

#### Work Step by Step

We are given a few quantities and asked to evaluate each to three significant figures and express each answer in SI units using an appropriate prefix. a) $(212mN)^2 * (\frac{1N}{10^3mN})^2=0.0449N^2= 44.9(10^-3)N^2$ b) $(52 800 ms)^2 * (\frac{1s}{10^3ms})^2=2788s^2= 2.79(10^3)s^2$ c) $(548(10^6))^{1/2}ms * (\frac{1s}{10^3ms})=23.4s$

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