a-fire-alarm-system-produces-a-loud-siren-that-has-an-intensity-of-5-x-10-2-w-m2

Question

A fire alarm system produces a loud sound that has an intensity of 5 × $$10^{-2}$$ $$w/m^{2} at a $$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?

Accepted Answer

9.05 × $$10^{3} J$$

Answer

1.56 × $$10^{2} J$$

Answer

7.19 × $$10^{2} J$$

Answer

2.26 × $$10^{3} J$$

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?