Question

A source of sound is detected in the middle of a room. Which can account for a decrease in sound intensity for an observer?

A) a decrease in speed from the source


B) an increase in speed from the source


C) a decrease in the radius from the source


D) an increase in the radius from the source

Answer 1

It's D

Step-by-step explanation:

The farther you are from the source, the lower the intensity of sound. Speed is not related to the intensity of sound, as the speed of sound is a constant. Therefore, a decrease in sound intensity for an observer can be caused by an increase in the radius from the source, which makes the observer farther away.

Answer 2

D

Step-by-step explanation: