Planet A and planet B are in circular orbits around a distant star. Planet A is 9.0 times farther from the star than planet B. What is the ratio of their speeds vA vB

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?