Ariel dropped a golf ball from her second story window. The ball starts from rest and hits the sidewalk 5 sec later with a velocity of 140 m/s. Find the average acceleration of golf ball.

What happens when a rubber rod is rubbed with a piece of fur?

What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.

Is the number of complete movements of a wave per second.