Author Question: Geosynchronous satellites orbit at about four Earth radii, where the Earth's gravitational pull is: ... (Read 126 times)

oliviahorn72 · **on:** Jul 27, 2018

Geosynchronous satellites orbit at about four Earth radii, where the Earth's gravitational pull is:

A) 2 g.
B) 1 g.
C) 1/2 g.
D) 1/4 g.
E) 1/16 g.

Question 2

The rate of cratering in the lunar highlands shows us that:

A) they must be younger than the older, darker mare.
B) they range from 4.6-4.4 billion years old, on average.
C) the largest impacts are the youngest, such as Copernicus and Tycho.
D) the oldest rocks are at least as old as the mare, but some craters are much younger.
E) most of the asteroids must have hit the Moon, not the Earth.