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Sound — Science STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9ScienceSound1 Mark
Question
If 20 waves are produced per second, what is the frequency in hertz?
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Answer

The frequency in hertz is equal to the number of waves produced per second. In this case, 20 waves are produced per second, so the frequency of sound waves is 20 hertz.

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