Answer :
Frequency = (speed) / (wavelength)
Frequency = (1540 m/s) / (7.52 x 10⁻⁵ m)
Frequency = 20.48 MHz
That frequency is more than 1,000 times higher than anything our ears can hear. That's why it's called "Ultra-sond".
Frequency = (speed) / (wavelength)
Frequency = (1540 m/s) / (7.52 x 10⁻⁵ m)
Frequency = 20.48 MHz
That frequency is more than 1,000 times higher than anything our ears can hear. That's why it's called "Ultra-sond".