Chapter 13, Problem 13.ACP

(a)

Interpretation Introduction

Interpretation:

Time period of $\text{1}\text{ppm}$ year has to be expressed in seconds.

Concept introduction:

Unit conversion:

  $\begin{array}{c}1Minute=60\sec onds\\ \\ 1Hour=60\min utes\\ \\ 1Day=24hours\\ \\ 1week=7days\\ \\ 1Year=52weeks\\ \\ 1Year=365.25days.\end{array}$

(b)

Interpretation Introduction

Interpretation:

Time period, $\text{1}\text{ppb}$ of a $\text{70-year}$ lifetime has to be expressed in seconds.

Concept introduction:

Refer part (a)