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9th Class Science Sound Question Bank 9th CBSE Science Sound

  • question_answer
        A sound wave has frequency of 3 kHz and a wavelength 45 cm. How long will it take to travel 1.8 km?

    Answer:

             Frequency v = 3 kHz = 3 x 103 Hz Wavelength From the relation, speed of wave Distance to be covered = 1.8 km =1.8 x 1000 =1800m   Time taken by the wave to cover the distance  of 1.8 km


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