The pressure amplitude in a sound wave from a radio receiver is `2.0xx10^-2 Nm^-2` and the intensity at a point is `5.0xx10^-7Wm^-2.` If by turning the volume knob the pressure amplitude is increased to `2.5xx10^-2Nm^-2` evaluate intensity.

Explanation

To solve the problem step by step, we will use the relationship between intensity and pressure amplitude in sound waves.

### Step 1: Understand the relationship between intensity and pressure amplitude
The intensity \( I \) of a sound wave is proportional to the square of the pressure amplitude \( P_0 \). Mathematically, this can be expressed as:
\[ I \propto P_0^2 \]
This means that if we know the initial intensity and pressure amplitude, we can find the new intensity when the pressure amplitude changes.
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