Question

Given that sound travels in sir 340 m/s find the wavelenghth of waves in air produced by a 20khz

Answer 1

speed=wavelength* frequency
wavelength=speed/frequency
=340/20
= 17m

Answer 2

Answer:

a) Speed of sound in water = 1,480 m/s

v= velocity of sound in air=340 m/s

u= frequency = 20kHz=20,000Hz

wavelength, y= v

y=340/20000=17/1000=0.017m

0.017×100 cm=1.7cm