Astronomers believe the moon used to be much closer to the earth(mass= 5.98 x 10^24 kg). when it was at 1.92 x 10^8 m, half its current distance, what was its orbital seed?

What law energy has never been broken

What statements accurately describe atoms

Aplanet of mass m 6.75 x 1024 kg is orbiting in a circular path a star of mass m 2.75 x 1029 kg. the radius of the orbit is r 8.05 x107 km. what is the orbital period (in earth days) of the planet tplanet?