Question

A source is producing 1500 waves in 3s. If the distance covered by a compression and an adjacent rarefaction be 108cm, Calculate: (1) frequency (2) wavelength in SI unit (3) velocity of the sound wave in SI unit.

Answer 1

Answer:

1). Frequency f = no of waves/ time

f = 1500/3s = 500Hz

Distance between adjacent compression and rarefaction is λ/2, given 108cm

Wave length λ/2 = 108cm

2). Wavelength λ = 216cm = 2.16m

3). Wave speed v = fλ

v = 500Hz x 2.16m

v = 1080m/s