You are at question (MCQ) number 8 and Test Number 5 of Physics: All topics. To deal with Physics questions, you must take lesson on the subject. In case of science and Art subjects revise your text books and in case of general aptitude topics take lessons from the topic page.
The question: Q10. Ultrasonics are sound waves of frequency
.... with options: Greater than 20,000 Hz
, Less than 10,000 Hz
, Equal to 1000 Hz
, None of these can be solved with the concepts and understanding of Physics.
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