Chapter 16: Problem 13: A wave traveling on a Slinky® that is stretched to a total length of 2.1m takes 2.5s to travel the length of the Slinky and back again. a) What is the propagation speed of the wave, in meters per second?  b) A periodic standing wave is created in the same Slinky stretched to the same length. It contains three antinodes and four nodes. What is the frequency of the wave, in hertz?

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