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  3. 9th Class
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  5. Work and energy

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

  • question_answer
    In a cloud, lightning and thunder are produced simultaneously. If thunder is heard by a man 5 seconds after the lightening is seen, how far the cloud is from the man? (Speed of sound in air = 340 m/s)

    A) 1500 m            

    B) 1600 m

    C) 1700 m

    D)        1800 m

    E) None of these

    Correct Answer: C

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