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14 September, 05:35

the distance from earth to the moon is approximately 3.84x10^5 km. how long would it take a radio wave with the frequency 7.25x10^5 Hz to travel from Earth to the moon

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  1. 14 September, 05:49
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    The time that would take a radio wave with the frequency of 7.25 x 10^5 Hz to travel from earth to the moon is 1.28 sec

    Calculation

    Time = distance / speed

    distance = 3.84 x 10 ^5 km

    convert Km to m

    1 Km = 1000 m

    3.84 x10^5km=? m

    by cross multiplication

    = (3.84 x 10^5 km x 1000 m) / 1 km = 3.84 x 10 ^8 m

    Speed of light = 3.0 x 10^8 m/s

    therefore time = 3.84 x10^8 m / 3.0 x10^8 m/s = 1.28 sec
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