Sound waves are longitudinal waves. Fast - about 330 meters per second (1083 feet per second) for sound in air, 1,500 m/s (4921 f/s) in water and 5,000 m/s (16,404 f/s) in steel. Sound requires a ...

References [1] Stability of combination of rarefaction waves with viscous contact wave for compressible Navier-Stokes equations with temperature-dependent transport coefficients and large data ...

Longitudinal waves show areas of compression and rarefaction: compressions are regions of high pressure due to particles being close together. rarefactions are regions of low pressure due to ...