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What are ultrasonic? - Physics

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प्रश्न

What are ultrasonic?

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उत्तर

Ultrasonic are sounds having frequency higher that 20 KHz and not audible to the human being.

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पाठ 7: Sound - Exercise [पृष्ठ २८६]

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फ्रँक Physics [English] Class 9 ICSE
पाठ 7 Sound
Exercise | Q 13 | पृष्ठ २८६
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