Question

find the frequency of wave whose speed is 400 m/s and wavelength 80 cm

Answer 1

Formula :

Speed of wave = frequency × wavelength .

Given information :

Speed of wave = 400 m/s

Wavelength = 80 cm

                    = 80 / 100 m

                    = 0.8 m

According to the formula :

400 m/s = 0.8 m × F

==> F = 400 m/s / 0.8 m

==> F = 400 m/s / 80 / 100 m

==> F = 5 × 100 / s

==> F = 500 Hz

ANSWER :

The frequency is 500 Hz

Thanks !!