Question

A sound 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?

Answer 1

The other one is correct but on Edge. it is A.

Step-by-step explanation:

A sound 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 = )

A) 1.8 × 10–4 W/m2 <------ This one.

B) 1.8 × 10–6 W/m2

C) 1.6 × 10–4 W/m2

D) 1.6 × 10–6 W/m2

Answer 2

The intensity of sound is calculated by dividing the power by the total area. This can be mathematically expressed into,
I = P / A
where I is intensity, P is power, and A is area. Substituting the known values,
I = (8.8 x 10-4 W) / (5.0 m^2)
I = 1.76 x 10-4 W/m^2