Frequency Physics Example 1

Solution

1. 1
   Use the definition of frequency: cycles per second.
2. 2
   Frequency: $$f = \frac{\text{number of cycles}}{\text{time}} = \frac{20}{40} = 0.5 \text{ Hz}$$
3. 3
   Period: $$T = \frac{1}{f} = \frac{1}{0.5} = 2 \text{ s}$$