Ultrasound solvent vapour pressure

The marked effects of ultrasound actually arise from the way in which sound is propagated through media. Longitudinal vibration of molecules in a liquid generates a series of compressions and rarefactions, that is areas of high and low local pressure. If the solvent molecules are tom apart with sufficient force during a rarefaction, cavities are formed at the points where the pressure in the liquid drops well below its vapour pressure. This creates... 

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