Longitudinal Waves. To see a animations of spherical longitudinal waves check out: In a longitudinal wave the particle displacement is parallel to the direction of wave propagation. The animation at right shows a one-dimensional longitudinal plane wave propagating down a tube.
The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals the pressure surrounding the liquid and the liquid changes into a vapor.
Generally, the solubility of gases in liquids increases with. a. increasing temperature and decreasing pressure. b. decreasing temperature and increasing pressure. c. increasing temperature and increasing pressure.