The intensity of a sound wave from a jet airplane as it is taking off is 12 Watts/m^2 at a distance of 10 m. What happens to the intensity of the sound waves as they travel out to a distance of 20 m from the jet airplane?
A. It decreases by a factor of 1.4.
B. It decreases by a factor of 2.0.
C. It decreases by a factor of 4.0.
D. (The intensity of the sound waves remains the same.)
Answer:C
The intensity of a sound wave from a jet airplane as it is taking off is 12 Watts/m^2 at a distance of 10 m. What happens to the intensity of the sound waves as they travel out to a distance of 20 m from the jet airplane?
A. It decreases by a factor of 1.4. B. It decreases by a factor of 2.0. C. It decreases by a factor of 4.0. D. (The intensity of the sound waves remains the same.)