Q: A sound is emitted at point A in space, and radiates as a sphere in all directions outward. The total energy emitted by the sound at point A is 100 W. What is the total energy of the entire sound wave at a distance d from point A? Assume no friction.
A		100/d W
B		100/d2 W
C		100d2 W
D		100 W

Energy & Work | Sound | Quantitative Skills |