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The nozzle and flapper mechanism is a displacement type detector which converts mechanical movement into a pressure signal by covering the opening of a nozzle with a flat plate called the flapper. [1] This restricts fluid flow through the nozzle and generates a pressure signal.
[2] [3] It consists of a valve connected to a hollow, sealed float by means of a lever mounted near the top of the tank. The float is often ball-shaped, hence the name ballcock. The valve is connected to the incoming water supply, and is opened and closed by the lever which has the float mounted on the end. When the water level rises, the float ...
A flapper is often part of the standard equipment on a fire engine and may also be set up inside and around forests and at heaths in order to take immediate action if a fire is seen. The flapper's technique has been developed from using a wet green pine bough, and wet burlap sacks in the rural south US, to swat the fire known as "wet sacking" a ...
The Baikal seal is one of the smallest true seals. Adults typically grow to 1.1–1.4 m (3 ft 7 in – 4 ft 7 in) in length [1] with a body mass from 63 to 70 kg (139 to 154 lb). [3] The maximum reported size is 1.65 m (5 ft 5 in) in length and 130 kg (290 lb) in weight. [4]
The flapper skate has a long and pointed snout, the length of the snout is between 3.7 and 5.1 times the diameter of the orbit. The disc is roughly rhomboidal in shape with a deeply concave front edge. There is a row of spines along the centre of the tail in front of the dorsal fins and the spines on the sides of the tail point headwards.
The flapper was an example of the prevailing conceptions of women and their roles during the Roaring 1920s. The flappers' ideal was motion with characteristics of intensity, energy, and volatility. She refused the traditional moral code. Modesty, chastity, morality, and traditional concepts of masculinity and femininity were seemingly ignored.
Both fore and hind flippers are used for turning. [3] A 2007 study of Steller's sea lion found that a majority of thrust was produced during the drive phase of the fore flipper stroke cycle. Although previous findings on eared seals suggested that thrust was generated by the initial outward movement of the fore flippers or the terminal drag ...
Though the flapper is much associated with that decade, such a limitation is not just misleading but inaccurate. For style's sake, I again also alter the passive “what was then considered acceptable behavior” to “prevailing codes of decent behavior,” "prevailing" obviously indicating those prevailing at the time and “decent ...