which statement best explains what the orbits in figure 4 show about the role of gravity in the Motions of the earth-moon system ​

if the forces acting on an object are unbalanced, the object will accelerate in the direction of the net force on the object.

explanation:

this is best explained by having an understanding of newton's second law, which states that f=ma. you see, when the forces are unbalanced, net force (sum of all forces) is not zero. therefore making it necessary for the object to have an acceleration in the direction of the net force.

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

k2s for potassium sulphide