How long would it take a radio wave with a frequency of 7.00 108 Hz to travel from Mars to Earth if the dista

Question

....between the two planets is approximately 8.00 107 km?

Answer 1

The frequency is irrelevant, just divide the distance by the speed of light, which is 3 x 10^8 meters per second.

If the distance between the two planets is approximately 8.00 x 10^7 km, that is 8.00 x 10^10 meters, so:

8.00 x 10^10
----------------
3.00 x 10 ^8

= 8/3 x 10^2

= 2.667 x 10^2

= 266.7 seconds