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=1.00m,` the radius of the ring is `R=5.00m`. 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_(0)=30 mu W//m^(2)`. The damping of the waves is negligible.

Explanation

To find the mean energy flow across the area enclosed by the ring, we will follow these steps:

### Step 1: Understand the Geometry
We have a point isotropic sound source located at a distance \( l = 1.00 \, \text{m} \) above the center \( O \) of a ring with radius \( R = 5.00 \, \text{m} \). The intensity of sound at point \( O \) is given as \( I_0 = 30 \, \mu \text{W/m}^2 \).

### Step 2: Calculate the Total Energy Flow from the Source
The total power \( P \) radiated by the sound source can be calculated using the intensity at point \( O \):
\[
...