471_Physics ProblemsTechnical Physics

471_Physics ProblemsTechnical Physics - 16 Wave Motion...

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16 CHAPTER OUTLINE 16.1 Propagation of a Disturbance 16.2 Sinusoidal Waves 16.3 The Speed of Waves on Strings 16.4 Reflection and Transmission 16.5 Rate of Energy Transfer by Sinusoidal Waves on Strings 16.6 The Linear Wave Equation Wave Motion ANSWERS TO QUESTIONS Q16.1 As the pulse moves down the string, the particles of the string itself move side to side. Since the medium—here, the string—moves perpendicular to the direction of wave propagation, the wave is transverse by definition. Q16.2 To use a slinky to create a longitudinal wave, pull a few coils back and release. For a transverse wave, jostle the end coil side to side. Q16.3 From v T = µ , we must increase the tension by a factor of 4. Q16.4 It depends on from what the wave reflects. If reflecting from a less dense string, the reflected part of the wave will be right side up. Q16.5 Yes, among other things it depends on. vA f A vA max == = ωπ π λ 2 2 . Here v is the speed of the wave.
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