# Chapter 19 - Plug and Chug: 33

a. $T = \frac{1}{f} = \frac{1}{10 Hz} = 0.10 s$. b. $T = \frac{1}{f} = \frac{1}{0.2 Hz} = 5 s$. c. $T = \frac{1}{f} = \frac{1}{60 Hz} = \frac{1}{60} s$.

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