hydrodynamic impact, hydrodynamic impulse

The force with which a liquid in motion strikes against a solid at rest. It is as the square of the velocity of the stream. hy-dro-dy-năm-ics, s. [HYDRODYNAMIC.] Physics: The department of science which treats of the nature of liquids, as opposed to hydrostatics, which investigates the condition of their equilib' rium when at rest. It specially investigates, by observation, experiment, or the higher mathemat. ics, the motion of liquids through orifices, in tubes, or that of water in canals, rivers, . Its principles are carried out in hydraulics, in which it was merly merged. One of the first to study the motion of water in rivers and canals was Guglielmini, A. D. "The able summary of the progre in hydrodynamics ." -Saturday Review, 1691.