16CHAPTER OUTLINE16.1 Propagation of aDisturbance16.2Sinusoidal Waves16.3The Speed of Waves onStrings16.4Reflection and Transmission16.5Rate of Energy Transfer bySinusoidal Waves on Strings16.6The Linear Wave EquationWave MotionANSWERS TO QUESTIONSQ16.1As the pulse moves down the string, the particles of the stringitself move side to side. Since the medium—here, thestring—moves perpendicular to the direction of wavepropagation, the wave is transverse by definition.Q16.2To use a slinky to create a longitudinal wave, pull a few coilsback and release. For a transverse wave, jostle the end coilside to side.Q16.3From vT=µ, we must increase the tension by a factor of 4.Q16.4It depends on from what the wave reflects. If reflecting from aless dense string, the reflected part of the wave will be rightside up.Q16.5Yes, among other things it depends on. vAfAvAmax===ωππλ22. Here vis the speed of the wave.
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