The formula on pg. According to the same formula T for the simple pendulum does not depend on mass M, therefore the frequency remains the same. Therefore putting additional mass on the vibrating blade lowers the frequency. The effect of mass is most important where the accelerations are largest. Shake the hose end in simple harmonic motion.
Ocean waves are mainly transverse.
The velocity of the sound wave must be much greater than the diffusion velocity of the gas molecules. As frequency increases the wavelength decreases since the wave velocity doesn't change much. Return to Hewitt page.