You hear a song from your playlist you haven't heard in a while and it warrants you to commence singing. As you are sing, the power of the compression wave you create is approximately 309.66 nW (note, nW is nano-Watts). What is the intensity of this sound as measured by your roommate who is standing 9.48m from you? Please give your answer in units of nW/m2. This unit is not a common one. Usually, the unit would simply be Watts per square-meter (which would be your answer divided by a million!). This goes to show you that are ears are amazingly sensitive to very tiny sound intensities. Note: Intensity was a topic covered in section 11.1, and I will provide the formula: I=P/A where P is the power in units of Watts, and A is the surface area of a sphere of radius "L" (in this problem). Note: In the space below, please enter you numerical answer. Do not enter any units. If you enter units, your answer will be marked as incorrect

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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You hear a song from your playlist you haven't heard in a while and it warrants you to commence singing.  As you are sing, the power of the compression wave you create is approximately 309.66 nW (note, nW is nano-Watts).  What is the intensity of this sound as measured by your roommate who is standing 9.48m from you?  Please give your answer in units of nW/m2.  This unit is not a common one.  Usually, the unit would simply be Watts per square-meter (which would be your answer divided by a million!).  This goes to show you that are ears are amazingly sensitive to very tiny sound intensities.  Note: Intensity was a topic covered in section 11.1, and I will provide the formula: I=P/A where P is the power in units of Watts, and A is the surface area of a sphere of radius "L" (in this problem).  Note: In the space below, please enter you numerical answer.  Do not enter any units.  If you enter units, your answer will be marked as incorrect.

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