Question

If the period of a certain wave (wavelength = 4.5 m) is 2 seconds, what is the speed of the wave?1) 0.44 m/s2) 1.1 m/s3) 9.0 m/s4) 2.3 m/s

Answer 1

Given data:

*The given wavelength of the wave is

`\lambda=4.5\text{ m}`

*The given time is t = 2 s

The formula for the speed of the wave is given as

`v=(\lambda)/(t)`

Substitute the known values in the above expression as

`\begin{gathered} v=(4.5)/(2) \\ =2.25\text{ m/s} \\ \approx2.3\text{ m/s} \end{gathered}`

Hence, the speed of the wave is v = 2.3 m/s and the correct option is (4)