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10 July, 08:02

The distance of a planet from its sun is 19000000 miles. if there are 29400000 seconds in one orbit, find the speed of the planet in its orbit about the sun. (assume a circular orbit)

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  1. 10 July, 08:07
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    Orbit circumference

    = 2 pi * 1.9*10^7 miles

    time for orbit trip = 2.9*10^7 s

    speed = 2 pi * 1.9 / 2.9 miles/second

    = 4.12 miles/second

    You did not say what units

    in miles per hour, multiply by 3600 and get

    14,820 miles/hour
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