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प्रश्न
The properties of ultrasound that make it useful are
विकल्प
High power and high speed
High power and good directivity
High frequency and high speed
High frequency and bending around the objects.
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उत्तर
The properties of ultrasound that make it useful are High power and good directivity
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संबंधित प्रश्न
The sketches I to IV in following Figure show sound waves, all formed in the same time interval.
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| I | II |
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| III | IV |
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