Question

The preiod of a wave is 0.2secs and its wave length is 60cm. Determine the velocity of the wave in meter per second

Answer 1

Answer:

use formula V=fl or lambda/\

Explanation:

as you know reciprocal of time is frequency

so f= 1/0.2 = 5 Hz

now we have to find v=?

v= f l

v= 5 × 60 =300 m/s

Answer 2

$wave \: length = 60cm \\ = 60 \times 1cm \\ = 60 \times \frac{1}{100} m \\ = 0.6m \: or \: \frac{3}{5} \\ period \: of \: wave = 0.2sec \\ = \frac{1}{5} sec \\ velocity = \frac{ \frac{3}{5} }{ \frac{1}{5} } \\ = 3ms {}^{ - 1}$