I note that lwal questioned wavelength. The calculation is easy, from the physics formula V=fl (velocity = frequency x wavelength). Since the speed of sound is 5000 feet / second in water (60,000 inches per second), the equation is
60,000 = 40,000 x l
from which it is trivial to solve for l.
l = wavelength = 60,000 inches per second / 40,000 cycles per second
= 1.5 inches / cycle
Note that the units match what we want to calculate, as they must if the formula has been used correctly.
For surfactant I use a lab grade detergent, Versaclean from Fisher Scientific.
60,000 = 40,000 x l
from which it is trivial to solve for l.
l = wavelength = 60,000 inches per second / 40,000 cycles per second
= 1.5 inches / cycle
Note that the units match what we want to calculate, as they must if the formula has been used correctly.
For surfactant I use a lab grade detergent, Versaclean from Fisher Scientific.