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    4. what is sound
    what is sound

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    0  Views: 790 Answers: 2 Posted: 12 years ago
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      2 Answers

      Vibrations that travel through the air or another medium and can be heard when they reach a person's or animals ear.

      12 years ago. Rating: 3
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        sound is the result of any action

        12 years ago. Rating: 0
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