×
Get Full Access to University Physics - 13 Edition - Chapter 16 - Problem 13e
Get Full Access to University Physics - 13 Edition - Chapter 16 - Problem 13e

×

# Unless indicated otherwise, assume the speed of | Ch 16 - 13E

ISBN: 9780321675460 31

## Solution for problem 13E Chapter 16

University Physics | 13th Edition

• Textbook Solutions
• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants

University Physics | 13th Edition

4 5 1 276 Reviews
18
1
Problem 13E

Unless indicated otherwise, assume the speed of sound in air to be v = 344 m/s. BIO Energy Delivered to the Ear. Sound is detected when a sound wave causes the tympanic membrane (the eardrum) to vibrate. Typically, the diameter of this membrane is about 8.4 mm in humans. (a) How much energy is delivered to the eardrum each second when someone whispers (20 dB) a secret in your ear? (b) To comprehend how sensitive the ear is to very small amounts of energy, calculate how fast a typical 2.0-mg mosquito would have to fly (in mm/s) to have this amount of kinetic energy.

Step-by-Step Solution:

Solution 13E Step 1: Diameter of ear drum d = 8.4 mm Radius r = 4.2 mm or 4.2x10 3 m Sound intensity level = 20dB Problem (a) Step 1: Energy delivered to the ear I = I 010 10 I0 = 10 12 W/m 2 I = 10 12*10 10 = 10 12.102 10 2 I = 10 W/m

Step 2 of 2

#### Related chapters

Unlock Textbook Solution