What are ultrasonic vibrations ? How is it Important ?
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hey
refer 9th class physics textbook
the last lesson sound
hope it helps
MARK ME AS BRAINLIST
refer 9th class physics textbook
the last lesson sound
hope it helps
MARK ME AS BRAINLIST
Simran2003:
But I am In class VIII
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the waves which have frequency above 20000Hz are known as ultra sonic vibrationsp
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Thanks!!!
tq
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