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Unit - 6.2 Reflection and Characteristics of Sound — PHYSICS STD 7 — Question

ICSE BoardEnglish MediumSTD 7PHYSICSUnit - 6.2 Reflection and Characteristics of Sound1 Mark
Question
Define frequency and its SI unit.
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Answer

The number of periods or cycles per second is called frequency. The SI unit for frequency is the hertz (Hz). One hertz is the same as one cycle per second.

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