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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

The area of a typical eardrum is about 5.0 × 10−5 m2. Calculate the sound power (the energy per second) incident on an eardrum at (a) the threshold of hearing and (b) the threshold of pain.

(a)

To determine
The sound power incident on an eardrum at threshold of hearing.

Explanation

Given Info: Area of eardrum is 5.0×105m2

Formula to calculate the power incident on the eardrum is,

P=IA

  • I is the reference intensity of the sound,
  • A is the area of eardrum,

Substitute 1.0×1012W/m2 for I and 5.0×105m2 for A in the above expression to get P

(b)

To determine
The sound power incident on an eardrum at threshold of pain.

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