Question

Use the fact that the speed of light in a vacuum is about 3.00 ✕ 10⁸ m/s to determine how many kilometers a pulse from a laser beam travels in exactly 2 hour(s)

Answer 1

$2hrs\times\frac{3600sec}{1hr}\times\frac{3.00\times10^8m}{1sec}\times\frac{1km}{1000m}=2.16\times10^9km$

Answer: $2.16\times10^9km$