Question

What is the speed in miles per second of a beam of light traveling at 3.00×108m/s?

Answer 1

Answer: 186411.3 mi/s

Explanation:

We have the speed of light in units of meters per second ($\frac{m}{s}$):

$3(10)^{8} \frac{m}{s}$

And we need to express it in miles per second ($\frac{mi}{s}$), knowing ($1 m=0.000621371 miles$), then:

$3(10)^{8} \frac{m}{s} \frac{0.000621371 miles}{1 m}=186411.3 \frac{mi}{s}$