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3 February, 15:53

Consider a galaxy which is 100 million light-years away. Calculate it speed, assuming that the Hubble constant is 22 km/sec/million lt/years. Enter your answer in the blank (numbers only - no units!).

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  1. 3 February, 16:20
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    2200

    Explanation:

    The Hubble law states that

    v = H * d

    where, v = speed, H = Humble constant, d = distance.

    Thus

    v=22 km / (sec/million ly) * 100 million ly

    =2200 km/sec.
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