sound waves cause air particles to vibrate back and forth; ripples cause water particles to vibrate up and down. A longitudinal wave is one in which the vibrations of the particles are parallel to ...

All motorcycle waves are truly a gesture to communicate support and camaraderie, often dedicated to just true motorcycles, from crotch-rockets to custom-built ones, versus something like a moped ...

Using demonstrations on the beach and his animated sketchbook Jon looks at the two main types of wave: transverse and longitudinal. Sea waves, light waves, and Mexican waves are all transverse waves.