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MPA 6

MPA 6 - MasteringPhysics Assignment Print View...

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Assignment 6- Week 7 Due: 11:59pm on Friday, October 28, 2011 Note: To understand how points are awarded, read your instructor's Grading Policy . [ Switch to Standard Assignment View] A Vibrating String An oscillator creates periodic waves on a stretched string. Part A If the period of the oscillator doubles, what happens to the wavelength and wave speed? Hint A.1 How to approach the problem If you double the period of the oscillator, its frequency will change and therefore so will the frequency of the wave on the string. You need to determine whether the wavelength and wave speed vary with the frequency. Hint A.2 Find the frequency If you double the period of the oscillator, what happens to the frequency? Hint A.2.1 Relation between frequency and period Hint not displayed ANSWER: It is halved. Correct Hint A.3 Find the wave speed If you double the period of the oscillator, what happens to the wave speed? Hint A.3.1 Wave speed Hint not displayed ANSWER: It is unchanged. Correct Hint A.4 Wavelength relation The wavelength of a periodic wave on a string is the distance between any two points in the string at corresponding positions on successive repetitions in the wave shape. It depends on MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrintVi... 1 of 8 11/24/11 11:32 AM

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the speed and frequency of the wave according to the relation . ANSWER: The wavelength is unchanged but the wave speed doubles.
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