This is used to show the relationship of v=F/ยต. As the rope is stretched, F increases and p. decreases. The can also be used to show the phase after reflection. Also, standing waves can be shown. A volunteer holds one end of the rope. Another one starts sending waves. The number of nodes n is n=21/w, where w is the wavelength, or n=21 v/v, where v is the frequency. Thus, we see that increasing the frequency or decreasing the tension in the rope increase the number of nodes n.

**Equipment Location:** G61

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