Question

A wave length 30 cm travels with frequency 15 s^-1. What is the speed of the wave? A.4.5 m/s B.9.0 m/s C.1.2 cm/s D.2.0 cm/s

Answer 1

Wavelength of the wave = 30 cm

Converting it into meters:

Wavelength =
`(30)/(100) = 0.3` m

Frequency of the wave = 15 Hz

Let the speed of the wave be v.

The relation between wavelength, frequency and speed of the wave:

Speed = frequency x wavelength

Speed = 15 x 0.3

Speed = 4.5 m/s

Hence, the speed of the wave = 4.5 m/s

Hence, option A is correct.