Question

If the speed of light is 3.0*10(8) m/s, and the moon is 404,927 km away, how long would it take a radio signal to go from earth to the moon and back again

Answer 1

Answer:

Explanation:

formula

t = d/r

d = 404927 km or 404927000 meters

r = 3 * 10^8 m/s

t = 404927000 / 3 * 10^8

t =1.35 seconds.

That's one way. To get it to go all the way and back multiply by 2

t = 2 * 1.35

t = 2.70 seconds