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9th Class Science Sound

  • question_answer 17)
    A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m s~1, how far away is the cliff?

    Answer:

    Speed of sound in salt water = 1531 m Time period = 1.02 sec Distance travelled 2 x d = speed x time                                                                  


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