1. The metric prefixes (micro, pico, nano, …) are given for ready reference on the inside front cover of the textbook (see also Table 1–2). (a) Since 1 km = 1 ×103m and 1 m = 1 ×106μm, ()33691km10 m10 m 10m m10m.===μμThe given measurement is 1.0 km (two significant figures), which implies our result should be written as 1.0 ×109m. (b) We calculate the number of microns in 1 centimeter. Since 1 cm = 10
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