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Which of the following examples represent periodic motion?

Options

  1. AA swimmer completing one (return) trip from one bank of a river to the other and back.
  2. BMovement of particles in the air
  3. CA hydrogen molecule rotating about its centre of mass.
  4. DAn arrow released from a bow.

Correct answer

C. A hydrogen molecule rotating about its centre of mass.

Step-by-step solution

Correct Option is : (C) A hydrogen molecule rotating about its centre of mass.

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