Question

Find the minimum and maximum wavelength of sound in water that is in the audible range 20 Hz - 20 kHz for a human ear. Speed of sound in water = 1450 m/s

Answer 1

 a) for minimum wavelength n = 20 KHz  
⇒v = nλ⇒ λ = (1450//20 * 10^3) = 7.25 cm.  
 

b) for maximum wavelength n will be minimum  
⇒ v = nλ⇒ λ = v/n ⇒ 1450 / 20 = 72.5 m. 

Answer 2

amount of minimum wavelength= n = 20 KHz  

speed of sound = v = nλ

λ = 1450/20 x 10³

= 7.25 cm.  
 

maximum wavelength = n will be minimum so 20 Hz
speed of sound = v = nλ

λ = v/n

=1450 / 20 

= 72.5 m.