Question

sound wave has frequency 2Hz and wave length40cm .how long it taketo treval1.6 km

Answer 1

DATA:

Frequecy=f=2hz

Wavelength=λ=40cm=0.4m

Distance=S=1.6km=1600m

Time taken by the wave to reach the distance 1600m = t = ??

Solution:

Since we know that :-

v=fλ

By using the above formula we will find velocity (v):-

v=2×0.4

v=0.8m/s

So as we know that:-

v=S/t

Therefore:-

T=S/v

By subsituting the values in above equation:

T=1600/0.8

T=2000seconds