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

  • question_answer
    Which of the following is correct?

    A) Loudness of sound depends on the frequency of sound.

    B) The higher the frequency, the higher is the pitch.

    C) The unit of amplitude is\[kg/{{m}^{3}}\].

    D) Both [b] and [c]

    E) None of these

    Correct Answer: B


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