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An air gap, as related to the plumbing trade, is the unobstructed vertical space between the water outlet and the flood level of a fixture. [1] Air gaps of appropriate design are legally required by water health and safety regulations in many countries. An air gap is the simplest form of a backflow prevention device.
Deaths. 1,490–1,635. RMS Titanic sank on 15 April 1912 in the North Atlantic Ocean. The largest ocean liner in service at the time, Titanic was four days into her maiden voyage from Southampton to New York City, with an estimated 2,224 people on board when she struck an iceberg at 23:40 (ship's time) [a] on 14 April.
Iceberg that sank the Titanic. Iceberg that sank the. Titanic. The passenger steamer Titanic collided with an iceberg and sank on the night of 14–15 April 1912 in the North Atlantic. Of the approximate 2,200 people on board, over 1,500 did not survive. After the disaster, there was interest in the iceberg itself to explain the circumstances ...
Sinkhole. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water enters into underground passages known as ponor, swallow hole or swallet. [1][2][3][4] A ...
The waterline is the line where the hull of a ship meets the surface of the water. A waterline can also refer to any line on a ship's hull that is parallel to the water's surface when the ship is afloat in a level trimmed position. Hence, waterlines are a class of "ships lines" used to denote the shape of a hull in naval architecture lines plans.
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Beatty's withdrawal at the sight of the High Seas Fleet, which the British had not known were in the open sea, reversed the battle by drawing the Germans towards the British Grand Fleet. Between 18:30, when the sun was lowering, back-lighting the German forces, and nightfall at 20:30, the two fleets—totalling 250 ships—directly engaged twice.
Elementary flow. In the larger context of the Navier-Stokes equations (and especially in the context of potential theory ), elementary flows are basic flows that can be combined, using various techniques, to construct more complex flows. In this article the term "flow" is used interchangeably with the term "solution" due to historical reasons.