Vapor Pressure. The Macroscopic View. The vapor pressure of a liquid is the equilibrium pressure of a vapor above its liquid (or solid); that is, the pressure of the vapor resulting from evaporation of a liquid (or solid) above a sample of the liquid (or solid) in a closed container.
Transverse and longitudinal are two different types of waves. The main difference between transverse and longitudinal waves is that in transverse waves, oscillations occur perpendicular to the direction of propagation of the wave, whereas in longitudinal waves, oscillations occur parallel to the direction of propagation of the wave.
Just like the wavelength of a transverse wave is the distance from crest to crest or trough to trough, the wavelength of a longitudinal wave is the distance between compressions or between rarefactions. Traveling Through Solids, Liquids and Gases. When it comes to mechanical waves, transverse and longitudinal waves are not equal.