Comment on Why can't a liquid move faster than the speed of sound in that medium?

• eRac@lemmings.world ⁨2⁩ ⁨days⁩ ago

  Yes. Nothing is truly incompressible. The speed of sound can be viewed as a measure of how much a material can squish on the atomic level before the next atoms move.

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  • Successful_Try543@feddit.org ⁨1⁩ ⁨day⁩ ago

    Nothing is truly incompressible.

    Exactly. One usually speaks of quasi-incompressibility when the resistance against compression (bulk modulus) is much greater than the resistance against shear (shear modulus), which is oft the case for liquids such as water.
    However, water has a lower resistance against compression (2 GPa) than e.g. steel (160 GPa), which is considered a compressive material.

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