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The wave equation is a second-order linear partial differential equation for the description of waves or standing wave fields such as mechanical waves (e.g. water waves, sound waves and seismic waves) or electromagnetic waves (including light waves).
History of fluid mechanics. The history of fluid mechanics is a fundamental strand of the history of physics and engineering. The study of the movement of fluids (liquids and gases) and the forces that act upon them dates back to pre-history. The field has undergone a continuous evolution, driven by human dependence on water, meteorological ...
Sailors heading down the Mississippi River picked up the song and made it a capstan shanty that they sang while hauling in the anchor. [4] This boatmen's song found its way down the Mississippi River to American clipper ships—and thus around the world. [5] The song had become popular as a sea shanty with seafaring sailors by the mid 1800s. [6]
Decoupage or découpage ( / ˌdeɪkuːˈpɑːʒ /; [ 1] French: [dekupaʒ]) is the art of decorating an object by gluing colored paper cutouts onto it in combination with special paint effects, gold leaf, and other decorative elements. Commonly, an object like a small box or an item of furniture is covered by cutouts from magazines or from ...
The Sherman Brothers, who wrote the Mary Poppins song, have given several conflicting explanations for the word's origin, in one instance claiming to have coined it themselves, based on their memories of having created double-talk words as children. [8] In another instance, they wrote:
Fee-fi-fo-fum. " Fee-fi-fo-fum " is the first line of a historical quatrain (or sometimes couplet) famous for its use in the classic English fairy tale "Jack and the Beanstalk". The poem, as given in Joseph Jacobs ' 1890 rendition, is as follows: to make my bread. Though the rhyme is tetrametric, it follows no consistent metrical foot; however ...
In fluid mechanics, non-dimensionalization of the Navier–Stokes equations is the conversion of the Navier–Stokes equation to a nondimensional form. This technique can ease the analysis of the problem at hand, and reduce the number of free parameters. Small or large sizes of certain dimensionless parameters indicate the importance of certain ...