Question

Find points that are in phase with point A and B respectively Determine wavelength, T, F and the speed of the wave

Answer 1

Points D, K, and R are in phase with point A while point E is in phase with point B.

There are 3 and half waves in 8m.

The wavelength can be calculated as

`\begin{gathered} 3.5\lambda=8 \\ \lambda=(8)/(3.5) \\ =2.285\text{ m} \end{gathered}`

It takes 16 seconds to complete 3 oscillations.

The time period can be calculated as

`\begin{gathered} 3T=16\text{ s} \\ T=\text{ }(16)/(3) \\ =5.33\text{ s} \end{gathered}`

The frequency of the wave will be

`\begin{gathered} f=(1)/(T) \\ =(1)/(5.33) \\ =0.19\text{ Hz} \end{gathered}`

The speed of the wave can be calculated as

`\begin{gathered} v=f\lambda \\ =\text{ 0.19}*2.285 \\ =\text{ 0.434 m/s} \end{gathered}`