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Are there compressible liquids?

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Liquids have little compressibility. Water, for example, will compress by only 46.4 parts per million for every unit increase in atmospheric pressure (bar). At around 4000 bar (58,000 psi) of pressure, at room temperature, water only experiences an 11% decrease in volume. read more

Liquids are compressible, otherwise shock and sound waves would not exist! In fact, it is a matter of ratio of density change to mean density - or more precise: convective velocity to speed of sound (which is the Mach number) to distinguish between compressible, slightly compressible and incompressible. read more

A fluid's compressibility is equivalent to the inverse of it's bulk modulus. Therefore, see your engineering reference handbook for tables of bulk modulus, such as that given below, and find the liquids with the highest value. Of the materials in the table below, Mercury is easily the most compressible. read more

That being said, and to be pedantic, liquids are on some level compressible. Difference between phases near critical point Let us imagine that we seal a pressure cooker, and boil water in it, letting pressure of steam increasing above the surface of water. read more

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