Question

1. Determine the wave-number of the wave shown in the figure below, where A = 9.8m and B = 1.3m. Note: Use this notation in writing your unit (Examples: 1/m or 1/s)
2. Gusts of wind make the bamboo grass sway back and forth at a vibration frequency of about 0.12Hz. What is its period of vibration?

Answer 1

$$T=\frac{1}{0.12}=8.3\ s$$