Question: A point isotropic sound source is located on the perpendicular to the plane of a ring drawn through the centre O of the ring. The

A point isotropic sound source is located on the perpendicular to the plane of a ring drawn through the centre O of the ring. The distance between the point O and the source is l = |.00 m, the radius of the ring is R = 0.50 m. Find the mean energy flow across the area enclosed by the ring if at the point O the intensity of sound is equal to I o = 30μW/m2. The damping of the waves is negligible.

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