1.The speed of light is now defined to be 2.99 7924 58 × 108 m/s. Express the speed of light to
(a) three significant figures,
(b) five significant figures, and
(c) seven significant figures.
2. Using your calculator, find, in scientific notation with appropriate rounding,
(a) the value of (2.437 × 104)(6.5211 × 109)/(5.37 × 104) and
(b) the value of (3.14159 × 102)(27.01 × 104)/(1 234 × 106).
3. Suppose your hair grows at the rate of 1/32 inch per day. Find the rate at which it grows in nanometers per second. Since the distance between atoms in a molecule is on the order of 0.1 nm, your answer suggests how rapidly atoms are assembled in this protein synthesis.