Question

a sound wave has a frequency 2 hz and wave length 40 cm how long will it take to travel 1.6km

Answer 1

Frequency=2Hz

Wavelength=40cm=0.40m

Velocity=?

v=f×lambda

v=2×0.40

v=0.80m/s

Now,

Time=Distance/Speed

Distance=1.6km=1.6×1000=1600m

Time=1600/0.80

Time=2000 seconds