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

  • question_answer
      (a) What should be the minimum distance between the listener and the reflector to hear an echo of sound propagating with a speed v ? (b) Does the speed of sound increase or decrease on a hotter day? Justify.

    Answer:

                      (a) Time  or or (b) The speed of sound increases with temperature. So, on a hotter day speed of sound is more.


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