Question

Select the most appropriate word from the given box and fill in the blank:

loudness intensity decibel objective subjective shriller pitch intensity amplitude less force

Wm⁻² is SI unit of ______ of sound wave.

Answer 1

Wm⁻² is SI unit of intensity of sound wave.

Explanation: 

The SI unit of sound intensity is watt per square metre \((\text{W m}^{-2})\). Sound intensity is the sound energy passing per unit area per unit time.