2. Questions Bank
  3. 9th Class
  4. Science
  5. Work and energy

9th Class Science Work and energy Question Bank Work, Energy and Sound

  • question_answer
    Which of the following is the hearing range for human beings?

    A) 20 Hz to 200 Hz

    B) 2 Hz to 200 Hz

    C) 20 Hz to 20 kHz

    D)        20 kHz to 200 kHz

    E) None of these

    Correct Answer: B

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