See below and explain fully. When Galileo first observed the four largest moons

Question

See below and explain fully.

When Galileo first observed the four largest moons orbiting the planet Jupiter, he quickly determined the time it took for each moon to complete one orbit but didn't determine the masses of the moons. Which statement is false? If we knew the distance from Jupiter to one of its moons and the orbital period of that moon, we could determine the mass of Jupiter. He couldn't determine the masses of the moons because the orbital period of satellite depends on the mass of the planet or star it is orbiting, not on the satellite's mass. We can determine the mass of Jupiter without knowing the orbital period of its moons. Two planets A and B, where B has twice the mass of A. orbit the Sun in elliptical orbits. The semi-major axis of the elliptical orbit of planet B is two times larger than the semi- major axis of the elliptical orbit of planet A. What is the ratio of the orbital period of planet B to that of planet A?

Explanation / Answer

Q no 018

2

Q023

Tb /Ta = (Rb/Ra)^(3/2) = 2^(3/2) = ?8

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