Question

A small radio speaker is suspended inside a spherical balloon. The balloon has a radius of 0.50 m. The power of the sound wave emitted from the speaker is 12 W. What is the intensity of the sound at the surface of the balloon? (The surface area [A] of the balloon is given by A=4πr2 .)

Radio frequency diagram - Wave Characteristics 25

A.
2.5 W/m2
B.
3.8 W/m2
C.
5.5 W/m2
D.
6.4 W/m2

Answer 1

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