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A planet in another solar system orbits a star with a mass of 4.0 x 1030 kg.At one point in its orbit it is 250 x 106 km from the star and is moving at 35 km/s.Take the universal gravitational constant to be 6.67 x 10-11 m2/s2 .kg and calculate the semimajor axis of the planet's orbit.The result is:
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