2. Sample Papers
  3. 9th Class
  4. Science

9th Class Science Sample Paper Science Sample Paper-3

  • question_answer
    What is the frequency of the sound wave, if a source produces 1800 sound waves in 3 seconds?

    A) 600 hertz

    B) 500 hertz

    C) 18 hertz

    D) 1800 hertz

    E) None of these

    Correct Answer: A

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