Hugo Rafael
IFAL, Engenharia Civil, Graduate Student
- Faculdade de Tecnologia de Alagoas, Engenharia Civil, Graduate Studentadd
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 × 10 3 m and 1 m = 1 × 10 6 μm, ()() 3 3 6 9 1km 10 m 10 m 10 m m 10 m. = = = μ... more
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 × 10 3 m and 1 m = 1 × 10 6 μm, ()() 3 3 6 9 1km 10 m 10 m 10 m m 10 m. = = = μ μ The given measurement is 1.0 km (two significant figures), which implies our result should be written as 1.0 × 10 9 μm. (b) We calculate the number of microns in 1 centimeter. Since 1 cm = 10 −2 m, ()() 2 2 6 4 1cm = 10 m = 10 m 10 m m 10 m. − − = μ μ We conclude that the fraction of one centimeter equal to 1.0 μm is 1.0 × 10 −4. (c) Since 1 yd = (3 ft)(0.3048 m/ft) = 0.9144 m, ()() 6 5 1.0 yd = 0.91m 10 m m 9.1 10 m. = × μ μ