#### Question

# Express the speed of light in the following?

Given that 1 inch = 2.54 cm exactly the speed of light, 3.00x10^8 m/s, in;

a) ft/ns

b) mile/s

#### Answers

(3.00×10? m/s)(100 cm/1 m)(1 in/2.54 cm)(1 ft/12 in)(1 s/1 000 000 000 ns) = 0.984 ft/ns.

(3.00×10? m/s)(1 km/1000 m)(1 mi/1.609344 km) = 186 400 mi/s.

#1

a) 3.00x10^8 m/s = 0.3 m/ns = [30/(2.54*12)]m = 0 0.98 ft/ns

b) [300/(2.54*12*5280)]*10^8 mile/s = 186411 mile/s

#2