Wave amplitudes

A. Use the diagram below to answer the following questions 1 to 4

1. What is the value of amplitude?

2. Find the wavelength of wave

3. If the speed of the wave is 30 m/s, find the frequency of the wave.

4. Mark any two points on the wave that are in phase

B.

5. State the factors that affect the period of a pendulum

6. What is simple harmonic motion?

7. What resonance frequency?