Answered: sound has an intensity

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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12. A sound has an intensity of 5.0 x 10^-8 W/m^2. What is the intensity of another sound 10 decibel louder than the first sound?

a. 5.0 x 10^-9 W/m^2

b. 4.7 x 10^-7 W/m^2

c. 4.7 x 10^-9 W/m^2

d. 5.0 x 10^-7 W/m^2

13. Stan Dingwave, atop his motorbike is gunning towards a hill at 20 m/s with his loudspeaker on resonating at 385 Hz. Ana Litical in her chevy is modestly chasing after him at 12 m/s. How much is the beat frequency she heard? Assume sound travels at 345 m/s in air.

a. 9.5 Hz

b. 37.9 Hz

c. 33.8 Hz

d. 8.5 Hz

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