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# A jet plane at takeoff can produce sound of intensity 10.0

ISBN: 9780321675460 31

## Solution for problem 25E Chapter 15

University Physics | 13th Edition

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Problem 25E

A jet plane at takeoff can produce sound of intensity 10.0 W/m2 at 30.0 m away. But you prefer the tranquil sound of normal conversation, which is 1.0 m W/m2. Assume that the plane behaves like a point source of sound. (a) What is the closest distance you should live from the airport runway to preserve your peace of mind? (b) What intensity from the jet does your friend experience if she lives twice as far from the runway as you do? (c) What power of sound does the jet produce at takeoff?

Step-by-Step Solution:

Solution 25E Step 1 of 6: (a) What is the closest distance you should live from the airport runway to preserve your peace of mind Intensity of jet plane sound , I =11 W/m at distance r =30 m 1 2 6 2 Intensity of jet plane sound , I =12 W/m =1× 10 W/m at distance r = 2 Using the inverse square law, 2 I1 r2 2 = r2 1 Solving for r , 2 2 I1 2 r 2 I2r1 I r = r 1 2 1 I2 Step 2 of 6: Substituting I =10 W/m , r =30 m, I =1× 10 W/m 6 2 1 1 2 10 W/m2 r2= 30 m 1×10 W/m 2 3 r2= 95 × 10 m 3 Using 1km=10 m r2= 95km Therefore, the closest distance you should live from the airport runway to preserve your peace of mind is 95 km. Step 3 of 6: (b) What intensity from the jet does your friend experience if she lives twice as far from the runway as you do Intensity of jet plane sound , I =101W/m at distance r =30 m 1 3 3 Intensity of jet plane sound , I = 2t distance r =2(95× 20 m)=180× 10 m Using the inverse square law, r2 I1 = 2 I2 r1 Solving for I , 2 r2 I = 1 I 2 r2 1

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##### ISBN: 9780321675460

University Physics was written by and is associated to the ISBN: 9780321675460. The answer to “A jet plane at takeoff can produce sound of intensity 10.0 W/m2 at 30.0 m away. But you prefer the tranquil sound of normal conversation, which is 1.0 m W/m2. Assume that the plane behaves like a point source of sound. (a) What is the closest distance you should live from the airport runway to preserve your peace of mind? (b) What intensity from the jet does your friend experience if she lives twice as far from the runway as you do? (c) What power of sound does the jet produce at takeoff?” is broken down into a number of easy to follow steps, and 93 words. This full solution covers the following key subjects: Sound, jet, runway, takeoff, produce. This expansive textbook survival guide covers 26 chapters, and 2929 solutions. Since the solution to 25E from 15 chapter was answered, more than 620 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: University Physics, edition: 13. The full step-by-step solution to problem: 25E from chapter: 15 was answered by , our top Physics solution expert on 05/06/17, 06:07PM.

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