May/June 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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25Wave Properties Wave BehaviourMedium1 mark
A source of sound of constant power P is situated in an open space. The intensity I of sound at distance r from this source is given by the equation shown.
How does the amplitude a of the vibrating air molecules vary with the distance r from the source?