Question

PLEASE PLEASE HELP!!

Answer 1

Explanation:

(1) We have,

Wavelength of a wave is 2 meters

Frequency of a wave is 6 Hz

It is required to find the velocity of a wave. The velocity of a wave is given by :

$v=f\lambda\\\\v=2\times 6\\\\v=12\ m/s$      

So, the velocity of a wave is 12 m/s.

(2)

Number of waves passing are 100

Time taken to pass the wave is 5 seconds

The frequency of wave is given by total number of waves passing per unit time. So,

$f=\dfrac{100}{5}\\\\f=20\ Hz$

Frequency of a wave is 20 Hz.