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9th Class Science Sound Question Bank Sound

  • question_answer
    What are the sound waves of frequency more than \[20\,\,kHz\] called?

    A) Supersonics  

    B)        Audible

    C) In frasonics   

    D)                    Ultrasonics  

    Correct Answer: D

    Solution :

    Sound waves above the audible range are called ultrasonics.


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