Asound wave with a power of 8.8 × 10–4 w leaves a speaker and passes through section a, which has an area of 5.0 m2. what is the intensity of sound in this area? (intensity = i = ) 1.8 × 10–4 w/m2 1.8 × 10–6 w/m2 1.6 × 10–4 w/m2 1.6 × 10–6 w/m2

Explanation:

The intensity of the sound wave is given by

where

P is the power

A is the area considered

In this problem, we have

Substituting into the formula, we find the intensity:

1 - wave length

2 - amplitude

3 - crest

4 - trough

explanation:

duh.

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