Waves on a power line. A physics student is watching the power line near his cabin bounce up and down in a light wind and puzzling over it. The light wind is causing it to vibrate in resonance at the fundamental frequency. He measures the period and it is 1.5 seconds (T = 1.5 s). The poles are 50m apart and both ends of the cable are fixed.

A.) What is the fundamental frequency?

B.) What is the fundamental wavelength?

C.) What is the speed of the waves in the cable?

D.) If one of the ends of the cable could slide up and down what would the first two standing wavelengths be? (one boundary is fixed and one is free now- nothing else has changed.)