Question

A vibrating body is producing 30waves in 6 second. The distance between a crest and next trough is
20cm.Calculate the velocity of the waves
0.3m
0.4m
0.53
0.6m

Answer 1

Answer:

sorry I don't know it's answer

Answer 2

Given:

A vibrating body is producing 30 waves in 6 second. The distance between a crest and next trough is 20cm.

To find:

Velocity of waves?

Calculation:

Distance between crest and trough (d) = 20 cm.

So, wavelength = 2 × d = 40 cm = 0.4 m

• Also, 30 waves are produced in 6 sec. So, in 1 complete wave is produced in 6/30 = 1/5 sec.

• So, frequency = 1/T = 5 Hz.

$\rm \: wave \: velocity = \lambda \times f$

$\rm \implies \: wave \: velocity = 0.4 \times 5$

$\rm \implies \: wave \: velocity = 2 \: m {s}^{ - 1}$

So, Wave Velocity is 2 m/s