Radio signals travel at a rate of #3 × 10^8# meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of the Earth if the satellite is orbiting at a height of #7.5 × 10^6# meters?

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Answer 1 · 2018-06-27T15:35:32

#{7.5 times 10^6\ "meters" }/{3 times 10^8\ "meters/sec"} =7.5/3 times 10^{-2} \ "sec" = 2.5 times 10^{-2}\ "sec" = .025\ "sec" #