Calculate teh wavelengths in air at 20 degree C for sounds in teh maximum range of human hearing., 20Hz to?

Question

20,000 Hz, (b) What is the walelength of a 10-MHz ultrasonic wave?

Answer 1

Speed of sound as a function of temperature in deg C
V=331.3 sqrt(1+t/273.15)
at t=20C
V=331.3 sqrt(1+20/273.15)=343.2 m/s

v=L f
The wavelength L the is
L=v/f= 343.2 /10 E+3 =0.034m