A student hears a sound with a power of P = 25 μW. At their distance from the source, the sound has intensity I = 0.93 W/m2.  Part (a) Assuming the eardrum is circular, what is the radius of their eardrum, in meters? Part (b) Another student stands in the exact same location, but receives 20% more power from the same source. What is the radius of the second student's eardrums?

College Physics
11th Edition
ISBN:9781305952300
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Chapter1: Units, Trigonometry. And Vectors
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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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A student hears a sound with a power of P = 25 μW. At their distance from the source, the sound has intensity I = 0.93 W/m2

Part (a) Assuming the eardrum is circular, what is the radius of their eardrum, in meters?

Part (b) Another student stands in the exact same location, but receives 20% more power from the same source. What is the radius of the second student's eardrums? 

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