What are the control variables in your investigation ?
2 answers:
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<h2>The intensity of siren is 0.015 W m⁻²</h2>
Explanation:
The intensity of sound is inversely proportional to the square of distance between source and the observer .
Thus Intensity at a distance 25 m is I₁ ∝ I
Similarly the intensity at a distance 50 m is I₂ ∝ II
Dividing II by I , we have
=
=
=
Thus I₂ = x 0.06 = 0.015 W m⁻²