The sound of a jet engine is given as 120 dB. What is the intensity of the jet sound wave? A) 1.0 W/m² B) 0.8 W/m² C) 0.6 W/m² D) 0.4 W/m² E) 0.2 W/m²

Question

Quizplus · Accepted Answer

The formula for intensity in decibels is:
I = I0 x 10^(dB/10)
where I0 is the reference intensity (1 x 10^-12 W/m^2)
Plugging in the values, we get:
I = 1 x 10^-12 x 10^(120/10)
I = 1 x 10^-12 x 10^12
I = 1 W/m^2
Therefore, the intensity of the jet sound wave is 1 W/m^2, which is option A.

The Sound of a Jet Engine Is Given as 120