(a) A sound wave travelling in a medium is represented .
(i) Which letter represents the amplitude of the wave ?
(ii) Which letter represents the wavelength of the wave ?
(iii) What is the frequency of the source of sound if the vibrating sound makes `360` oscillations in `2` minute ?
(b) Describe an experiment to show the reflection of sound.
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Explanation

(a) (i) x (ii) y (iii) `v = (360 "oscillations")/(2 xx 60) = 3 Hz`
(b) N/A.