A ball is rolled continuously up a hill, another bounces around a basketball court for awhile after being dropped by a child, a third ball falls to the earth, and a fourth rolls down a hill. Which of these events is a spontaneous process? Select all that apply

the ball being rolled up the hill
the bouncing of the basketball
the ball falling to earth
the ball rolling down the hill

the bouncing of the basketball

the ball falling to earth

the ball rolling down the hill

Explanation:

A spontaneous process is capable of proceeding in a given direction without needing to be driven by an outside source of energy.

When the ball is rolled continuously up a hill: It is a non - spontaneous process as energy is supplied to the ball in order to overcome gravity.When the ball bounces around a basketball court for a while after being dropped by a child: It is a spontaneous process as the bouncing of the basketball is simply following gravity and natural mechanics.When a third ball falls to the earth: It is a spontaneous process because there is not outside source of energy as gravity pulls the ball as it falls to the earth.When the ball is rolling down hill: It is a spontaneous process because no outside source of energy is acting on the ball. The ball rolls down the hill due to gravity.