18. Waves & Sound
Wave Intensity
18. Waves & Sound Wave Intensity
7PRACTICE PROBLEM
A fire alarm system produces a loud sound that has an intensity of 5 × 10-2 w/m2 at a distance of 4 m. The alarm is on for 15 minutes. What is the energy transferred away from the alarm if its output power remains constant?
A fire alarm system produces a loud sound that has an intensity of 5 × 10-2 w/m2 at a distance of 4 m. The alarm is on for 15 minutes. What is the energy transferred away from the alarm if its output power remains constant?