Question

3. The property of sound called intensity is proportional

to the rate at which energy flows through
A.an area perpendicular to the direction of
propagation.

B.an area parallel to the direction of propagation.

C.a cylindrical tube.

D.a sound wave of a certain frequency.

Answer 1

A. an area perpendicular to the direction of propagation.

Step-by-step explanation:

The property of sound called intensity is proportional

to the rate at which energy flows through an area perpendicular to the direction of propagation.