Question: Two planets P 1 and P 2 orbit around a star S in circular orbits with speeds v 1 = 45.8 km/s, and v 2

Two planets P1 and P2 orbit around a star S in circular orbits with speeds v1 = 45.8 km/s, and v2 = 59.8 km/s respectively.

(a) If the period of the first planet P1 is 7.70 years, what is the mass of the star it orbits around? kg (b) Determine the orbital period of P2.

yr

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