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30 July, 01:26

A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 6.9 x 1020 m, and the angular speed of the star is 9.2 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?

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  1. 30 July, 02:15
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    2.16 x 10^7 years

    Explanation:

    R = 6.9 x 10^20 m

    ω = 9.2 x 10^-15 rad/s

    T = 2π / ω

    T = (2 x 3.14) / (9.2 x 10^-15)

    T = 6.826 x 10^14 second

    T = 2.16 x 10^7 years
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