1.) The radio wave from a station broadcasting at 1.3*10^6 Hz has a wavelength of 230 m. What is the wave's speed?
2.) A wave has a frequency of 575 Hz. What is its period?
3.) A humming bird feeder is tied by a rope to a tree branch. You notice that in a gentle breeze, the feeder moves back and forth 15 times in 1 minute. How long is the rope?
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