Question

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

Answer 1

frequency=2 hz

wavelength=0.4m

now,velocity=wavelength*frequency

velocity=2*0.4=0.8m/s

now,distance=speed*time

1.6*1000=0.8*time

time=2000sec.