Question

mean distance of neptune to the sun $4.50\times10^{12}m$
mean distance of uranus to neptune $1.63\times10^{12}m$
2a. what fundamental force is the author referring to in this passage as a force between
planets?
a gravitational force
b. electromagnetic force
c. strong nuclear force
d. weak nuclear force

Explanation:

The gravitational force is the fundamental force that acts between massive objects like planets. It is responsible for the orbital motion of planets around the Sun and the interaction between planets. The electromagnetic force acts between charged particles, the strong nuclear force holds the nucleus of an atom together, and the weak nuclear force is involved in radioactive decay. Since the question is about the force between planets (which are massive objects), the gravitational force is the relevant one.

Answer:

A. gravitational force