Author Question: Ekapluto is an unknown planet that has two moons in circular orbits. The table summarizes the ... (Read 46 times)

sammy · **on:** Jul 29, 2018

Ekapluto is an unknown planet that has two moons in circular orbits. The table summarizes the hypothetical data about the moons.

Mass Radius Orbital Radius Orbital period
Moon A 4.0 1020 kg 2.0 108 m 4.0 106 s
Moon B 1.5 1020 kg 2.0 105 m 3.0 108 m

The orbital period of Moon B is closest to
A) 5.6 106 s.
B) 6.0 106 s.
C) 6.4 106 s.
D) 6.9 106 s.
E) 7.3 106 s.

Question 2

Two moons orbit a planet in nearly circular orbits. Moon A has orbital radius r, and moon B has orbital radius 4r. Moon A takes 20 days to complete one orbit. How long does it take moon B to complete an orbit?

A) 20 d
B) 40 d
C) 80 d
D) 160 d
E) 320 d