A longitudinal wave is one in which the vibrations of the particles are parallel to the direction in which the energy of the wave travels. compressions are regions of high pressure due to ...

The National Longitudinal Study ... Institute of Child Health and Human Development (NICHD) with co-funding from 17 other federal agencies, AddHealth is the largest, most comprehensive survey of ...

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 ...