## Question

###### Two planets P1 and P2 orbit around a star S in circular orbitswith speeds v1 = 40.6 km/s, and v2 = 59.4 km/s respectively. (a) Ifthe period of the first planet P1 is 750 years what is the mass, inkg, of the star it orbits around? kg (b) Determine the orbitalperiod, in years, of P2. yr

Two planets P1 and P2 orbit around a star S in circular orbits with speeds v1 = 40.6 km/s, and v2 = 59.4 km/s respectively. (a) If the period of the first planet P1 is 750 years what is the mass, in kg, of the star it orbits around? kg (b) Determine the orbital period, in years, of P2. yr

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