Question

what do you mean by ultrasonics D.A.V school​

Answer 1

Answer:

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Alternative Titles: ultrasonic wave, ultrasound

Ultrasonics, vibrations of frequencies greater than the upper limit of the audible range for humans—that is, greater than about 20 kilohertz. The term sonic is applied to ultrasound waves of very high amplitudes.

Answer 2

Answer:

This is the full form of D.A.V

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