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

  • question_answer
      Prove that  where the symbols have their usual meanings.

    Answer:

                      Let the time period of a wave be T seconds. In T seconds, number of waves generated = 1. So, in 1 second number of waves generated  But number of waves generated in 1 second is frequency.                                            Now,  Velocity


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