9th Class Science Sample Paper Science Olympiad Model Test Paper-16

  • question_answer
    A sound wave has a frequency of 5 kHz and wave length 10 cm. How long will it take to travel 2.5 km?

    A) 4 s

    B) 10 s

    C) 2 s

    D) 5 s

    E) None of these

    Correct Answer: D

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