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9th Class Science Sound Question Bank Sound

  • question_answer
    Ultrasonic waves are used for detecting objects under water. What is the technique/device used for this?

    A) Ultrasonography

    B) Echocardiography

    C) Phacoemulsification       

    D) Sonar  

    Correct Answer: D

    Solution :

    Sonar is a device that uses underwater sound waves to detect and locate submerged objects or measure the distances under water.


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