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1 October, 16:01

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

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Answers (1)
  1. 1 October, 17:34
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    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.
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