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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 conditions and internal ...
Harlow : first feature film shot on video at the lower range of modern high definition. It used Electronovision, an American film production process based on the French 819 lines TV system, which could display 737 active lines on screen, so slightly above 720p (albeit as a B&W, interlaced, 4/3 format). Videotape was transferred to 35 mm film ...
Fracking (also known as hydraulic fracturing, fracing, hydrofracturing, or hydrofracking) is a well stimulation technique involving the fracturing of formations in bedrock by a pressurized liquid.
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 ...
Main article: Early history of animation. Animated movies are part of ancient traditions in storytelling, visual arts and theatre. Popular techniques with moving images before film include shadow play, mechanical slides, and mobile projectors in magic lantern shows (especially phantasmagoria ). Techniques with fanciful three-dimensional moving ...
On June 23, 1938, the PWA approved nearly $6 million (equivalent to $129.9 million today) for the Tacoma Narrows Bridge. [9] Another $1.6 million ($34.6 million today) was to be collected from tolls to cover the estimated total $8 million cost ($173.2 million today). Following Moisseiff's design, bridge construction began on November 23, 1938. [11]
The Mississippi drainage basin includes the Missouri and the Mississippi rivers, the two longest main-stem rivers in the United States, as well as 18 more of the rivers on this list. The Mississippi main stem is highlighted in dark blue. The longest rivers of the United States include 38 that have main stems of at least 500 miles (800 km) long.
Length. For measuring length, the U.S. customary system uses the inch, foot, yard, and mile, which are the only four customary length measurements in everyday use. From 1893, the foot was legally defined as exactly 1200⁄3937 m (approximately 0.304 8006 m ). [ 13] Since July 1, 1959, the units of length have been defined on the basis of 1 yd ...