Please explain

1. Describe the anatomy of a wave and include terms crest, trough, amplitude and wavelength.

2. A pendulum swings back and forth 5 times in 10 seconds, what is the period of the pendulum?

a. What is the frequency?

3. You are sitting at the beach and want to determine the speed of a wave. You estimate the wavelength to be 3 m and find the frequency to be 5 Hz. What is the speed of the wave?

4. As a pendulum swings describe how the kinetic and potential energy changes.