(i) What is meant by frequency of sound (W) waves? (ii) Give the ra...

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(i) What is meant by frequency of sound
(W) waves?
(ii) Give the range of frequencies of sound waves that an average human ear can detect.
(iii) A source of wave produces 20 crests and 20 troughs in \( 0.2 \mathrm{~s} \). The distance between a crest and next trough is \( 50 \mathrm{~cm} \). Find the
(a) wavelength,
(b) frequency
(c) time period of the wave.
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