Explanation Given info: The sound level in afternoon is 80.0 dB and the number of cars in afternoon is 100 cars per minute and the number of cars passing outside the window is 5 cars per minute . The expression for the sound level is, β = 10 log ( n I I 0 ) (1) Here, I is the intensity of the sound. I 0 is the reference intensity. n is the number of cars passing per minute. Substitute 1.00 × 10 − 12 W / m 2 for I o , 100 cars per minute for n and 80.0 dB for β in above expression. 80.0 dB = 10 log ( I × 100 cars per minute 1.00 × 10 − 12 W / m 2 ) I = 1 × 10 − 6 W / m 2 To calculate the sound level in the night applies the equation (1)

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ISBN: 9781305000988

Author: SERWAY

Publisher: CENGAGE LEARNING (CUSTOM)

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Chapter 17, Problem 17.53AP

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The average late night sound level.

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Chapter 17, Problem 17.52AP

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Chapter 17 Solutions

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The average late night sound level.

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