How long would it take a radio wave whose frequency is 7.25 x 10^5 Hz to travel from Mars to Earth if the distance between the two planets is approximately 8.00 x 10^7 km?
The velocity (or speed) of a radio wave radiated into free space by a transmitting antenna is equal to the speed of light - 186,000 miles per second or 300,000,000 meters per second. Use this to solve. ChaCha!
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