Longitudinal wave and seismic P-waves (created by earthquakes and explosions). In longitudinal waves, the displacement of the medium is parallel to the propagation of the wave, and waves can be either straight or round. A wave along the length of a stretched Slinky toy, where the distance between coils increases and decreases, is a good visualization. In the case of longitudinal harmonic sound waves, the frequency and wavelength can be described by the formula where: The quantity "x"/"c" is the time that the wave takes to travel the distance "x". The ordinary frequency ("f") of the wave is given by The wavelength
The Crests No: 160201) Unreleased recordings The Crests The Crests were an American doo-wop group, formed by bass vocalist J.T. Carter in the mid 1950s. The group had several Top 40 hits in the late 1950s and early 1960s on Coed Records. Their most popular song, "16 Candles", rose to #2 on the "Billboard" Hot 100 chart in February 1959 selling over one million copies and earning a gold disc status. The group's other hits include "Step By Step", "The Angels Listened In", "Trouble In Paradise", "Six Nights A Week", and "A Year Ago Tonight". The Crests were the first interracially mixed