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Physics, 10.07.2019 17:20 mia1518

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius
r, so that the two stars are always on opposite sides of the circle.
(a) find the gravitational force of one star on the other.
(b) find the orbital speed of each star.
(c) find the period of the orbit of each star.
(d) how much energy would be required to separate the two stars to infinity?

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