A jet plane at take-off can produce sound of intensity 10.0 W/m2 at 30.3 m away.

Question

A jet plane at take-off can produce sound of intensity 10.0 W/m2 at 30.3 m away. But you prefer the tranquil sound of normal conversation, which is 1.0 ?W/m2. Assume that the plane behaves like a point source of sound.

What power of sound does the jet produce at take-off?

Exercise 15.25 Part A What is the closest distance you should live from the airport runway to preserve your peace of A jet plane at take-off can produce sound of intensity 10.0 W/m2 at 30.3 m away. But you prefer the tranquil sound of normal conversation, which is 1.0 W/m2. Assume that the plane mind? Express your answer using two significant figures. r=96 km haves like a point source of sound Submit My Answers Give Up Correct Part B What intensity from the jet does your friend experience if she lives twice as far from the runway as you do? Express your answer using two significant figures. 1-025 pWI Submit My Answers Give Up Correct Part C What power of sound does the jet produce at take-off? Express your answer using two significant figures. P115370.592 Submit My Answers Give Up

Explanation / Answer

C) power = Intensity /surface area = I*(4*pi*r^2) = (10)*(4*3.142*30.3^2) =115385.5512 W = 1.153*10^5 W

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