PHASE Starting phase Point in displacement cycle at which the object begins to vibrate Instantaneous phase Point in displacement cycle at the time of measurement.

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PHASE Starting phase Point in displacement cycle at which the object begins to vibrate Instantaneous phase Point in displacement cycle at the time of measurement Units: Angle (in degree or radian)

http://www.suu.edu/faculty/penny/Phsc2210/Physlets/PhysletsForWeb/Semester1/circmotion.htm

What is the starting phase of the following sine waves?

6

7

What is the instantaneous phase at time 0 What is the instantaneous phase at time 0.5 sec for each of these sine waves? 8

9

Describe the following waves 10

Describe the following waves 11

Describe the following waves 12

Sound transmission Occurs as a series of condensations and rarefactions Condensation: Area with high concentration of air particles. Rarefaction: Areas with low concentration of air particles http://www.kettering.edu/~drussell/Demos/rad2/mdq.html 13

Wave transmission Longitudinal transmission Transverse transmission http://www.kettering.edu/~drussell/Demos/waves/wavemotion.html 14