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(a) A sound wave travelling in a medium ...

(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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In the figure,
The amplitude is represented by X.
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