Homework 32

# Homework 32 - sanchez (ds28677) – homework 32 – Turner...

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: sanchez (ds28677) – homework 32 – Turner – (58220) 1 This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 4) 10.0 points A traveling wave propagates according to the expression y = (2 . 12 cm) sin bracketleftBig (1 . 23 cm − 1 ) x- (3 . 79 s − 1 ) t bracketrightBig , where x is in centimeters, and t is in seconds. Find the amplitude of the wave. Correct answer: 2 . 12 cm. Explanation: Let : A = 2 . 12 cm . Given a wave y = A sin( k x- ω t ), the ampli- tude of the wave is A = 2 . 12 cm . 002 (part 2 of 4) 10.0 points Determine the wavelength of the wave. Correct answer: 5 . 10828 cm. Explanation: Let : k = 1 . 23 cm − 1 . The angular wave number of the wave is k , so λ = 2 π k = 2 π 1 . 23 cm − 1 = 5 . 10828 cm . 003 (part 3 of 4) 10.0 points Determine the frequency of the wave. Correct answer: 0 . 603197 Hz. Explanation: Let : ω = 3 . 79 s − 1 . The angular frequency of the wave is ω , so f = ω 2 π = 3 . 79 s − 1 2 π = . 603197 Hz . 004 (part 4 of 4) 10.0 points Determine the period of the wave. Correct answer: 1 . 65783 s. Explanation: The period of the wave is T = 1 f = 1 . 603197 Hz = 1 . 65783 s . 005 10.0 points A wave on a string is described by the wave function y = (0 . 1 m) sin[(0 . 5 rad / m) x- (20 rad / s) t ] Determine the frequency of oscillation of a particular point at x = 2 . 0 m. Correct answer: 3 . 1831 Hz. Explanation: Let : ω = 20 rad / s . In fact, when a wave with frequency f trav- els along a string, any point of the string has the same oscillation frequency f . In this case, f = ω 2 π = 20 rad / s 2 π = 3 . 1831 Hz keywords: 006 (part 1 of 2) 10.0 points A steel piano wire is 0 . 7 m long and has a mass of 80 g. It is stretched with a tension of 300 N. What is the speed of transverse waves on the wire?...
View Full Document

## This note was uploaded on 04/07/2011 for the course PHY 303K taught by Professor Turner during the Spring '08 term at University of Texas.

### Page1 / 5

Homework 32 - sanchez (ds28677) – homework 32 – Turner...

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

View Full Document
Ask a homework question - tutors are online