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Do you know your Basics?- IX

Classical Mechanics Level 1

Which of the following frequency of sound can not be heard by human beings?

400 Hz 4000 Hz 40 Hz 40000 Hz

Excel in math and science

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It's hard to learn from lectures and videos

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Our wiki is made for math and science

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including olympiad champions, researchers, and professionals.

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by Swapnil Das

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