Model of longitudinal standing wave, hand-cranked.

Model of longitudinal standing wave, hand-cranked. Machine Model for Longitudinal Standing Waves. Cranking the handle creates a longitudinal standing wave. N marks each node. Each node is stationary. Consecutive nodes are, alternately, at regions of compression or rarifaction. As the handle turns, a compressed region becomes rarified, and vice versus.
UCB Index: 
B+50+5
PIRA Index: 
3B22.60
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