Homework Help: physics

Posted by jason on Saturday, October 25, 2008 at 4:34pm.

a 9.9*10^23 kg planet orbits a star in a circular orbit. The planet is 5.6 AU away from the star and has an orbital velocity of 32 km/s. What is the mass of the star. (1AU = 1.496*10^11m)

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