ps03 - ASSIGNMENT 3 Physics 218 Due Fri Sep 17 Fall 2004...

This preview shows pages 1–2. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ASSIGNMENT 3 Physics 218 Due Fri Sep 17 Fall 2004 Labs start next week. The string lab is in Rock 26 and the sound lab is in Rock 30. To simplify comparing your solutions with others, use ( x, t ) = A sin( kx t ) for the displacement of a traveling sinusoidal sound wave, and use P m for the pressure amplitude and R m for the density amplitude the amplitudes multiplying cos( kx t ) or sin( kx t ) as appropriate. (The subscript m is for maximum.) For air at STP, use = 1 . 29 kg/m 3 , p = 1 . 01 10 5 N/m 2 , and = 1 . 4. 1. Derive the following relationships for traveling sinusoidal sound waves in a gas: (a) The pressure amplitude P m in terms of the displacement amplitude A . (b) The density amplitude R m in terms of the displacement amplitude A . (c) The maximum value of the density (per unit volume) of kinetic energy of a sound wave ( dK/dV ) in terms of the displacement amplitude A . (d) The maximum density (per unit volume) of the potential energy of a sound wave ( dU/dV ) in terms of the displacement amplitude A . (e) The maximum intensity of a sound wave I m in terms of the displacement amplitude of the sound wave A . 2. (a) First calculate the speed of sound c in air at STP....
View Full Document

This note was uploaded on 09/28/2008 for the course PHYS 218 taught by Professor Pollack during the Fall '04 term at Cornell University (Engineering School).

Page1 / 2

ps03 - ASSIGNMENT 3 Physics 218 Due Fri Sep 17 Fall 2004...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online