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  3. 9th Class
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9th Class Science Sample Paper Science Olympiad Model Test Paper-21

  • question_answer
    The frequency of a source is 20 kHz. The frequencies of the sound waves produced by it in water and air will:

    A) Be same as that of the source

    B) Depend upon the velocity of the waves in these media

    C) Depend upon the wavelength of the waves in these media

    D) Depend on the density of the media

    E) None of these

    Correct Answer: A

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