Question

If you were standing on the moon and you had a radio signal transmitter, you could send the radio signal to Earth in 1.28 seconds. If radio waves travel at 3.00 X 1018 m/s, what is the distance from the moon to the earth in kilometers?

Answer 1

Distance between moon and earth =
`3.84*10^(5)km`

Step-by-step explanation:

Distance traveled by radio waves = Velocity of radio waves * Time taken by radio waves

Velocity of radio waves =
`3*10^(8)m/s`

Time taken by radio waves = 1.28 seconds

So distance traveled by radio wave =
`3*10^(8)*1.28=3.84*10^(8)m`

Distance between moon and earth =
`3.84*10^(8)m`=
`3.84*10^(5)km`