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The sound of frequency greater than 20,000 Hz is called ....

20,000 112 से अधिक आवृति की ध्वनि
कहा जाता है।
Positive electrode is called
घनात्मक इलेक्ट्रोड को
कहते हैं।
d.​

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User Alan Kay
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6 votes

Answer:

ultra sound... follow me

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User Mayankbatra
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