fire nozzles!

fire nozzles

Comprehensive Analysis

1) "Fire" -- As to fire nozzles 1fire Pronunciation: 'fi(-&)r Function: noun Usage: often attributive Etymology: Middle English, from Old English fyr; akin to Old High German fiur fire, Greek pyr 1 a (1) : the phenomenon of combustion manifested in light, flame, and heat (2) : one of the four elements of the alchemists b (1) : burning passion : ARDOR (2) : liveliness of imagination : INSPIRATION 2 a : fuel in a state of combustion (as on a hearth) b British : a small gas or electric space heater 3 a : a destructive burning (as of a building) b (1) : death or torture by fire (2) : severe trial or ordeal 4 : BRILLIANCY, LUMINOSITY <the fire of a gem> 5 a : the firing of weapons (as firearms, artillery, or missiles) b : intense verbal attack or criticism c : a rapidly delivered series (as of remarks) - fire·less /-l&s/ adjective - on fire 1 : being consumed by fire : AFLAME 2 : EAGER, BURNING - under fire 1 : exposed to fire from an enemy's weapons 2 : under attack Pronunciation Symbols It has been suggested that this article or section be merged with Flame. (Discuss) A forest fire Fire is the rapid oxidation process that creates light, heat, and smoke, and varies in intensity. It is commonly used to describe either a fuel in a state of combustion (e.g., a campfire, or a lit fireplace or stove) or a violent, destructive and uncontrolled burning (e.g., in buildings or a wildfire). The discovery of making fire is considered one of the most important elements in the evolution of humankind, for it allowed higher hominids to ward off wild animals, cook food, and provide warmth as well as a source of light in darkness. 1 Controlling fire 2 Fire and religion 3 Fire as a power source 4 The chemistry of fire 4.1 Flame 4.2 Typical temperatures of fires and flames 5 Fires in history 6 Fire protection and prevention 7 See also 8 References 8.1 Citations 8.2 General references 9 External links Controlling fire for the purposes of providing heat and light is one of humankind's first great achievements. The ability of fire making to generate heat and light made possible migration to colder climates and enabled people to cook food — a decisive step in the endless fight against disease. Smoke signals were an early use of fire for communication,[citation needed] and fire soon enabled advancements in metallurgy such as smelting and forging. Archaeology indicates that ancestors of modern humans such as Homo erectus seem to have been using controlled fire as early as some 790,000 years ago. The Cradle of Humankind site has evidence for controlled fire from 1 to 1.8 million years ago. 2) "Nozzles" -- As to fire nozzles noz·zle Pronunciation: 'nä-z&l Function: noun Etymology: diminutive of nose 1 a : a projecting vent of something b : a short tube with a taper or constriction used (as on a hose) to speed up or direct a flow of fluid c : a part in a rocket engine that accelerates the exhaust gases from the combustion chamber to a high velocity 2 slang : NOSE Pronunciation Symbols Nozzles redirects here. For the character from Jungle Jam and Friends: The Radio Show!, see Nozzles the Elephant. Rocket nozzle. Water nozzle. A nozzle is a mechanical device designed to control the characteristics of a fluid flow as it exits from an enclosed chamber into some medium. A nozzle is often a pipe or tube of varying cross sectional area, and it can be used to direct or modify the flow of a fluid (liquid or gas). Nozzles are frequently used to control the rate of flow, speed, direction, mass, and/or the pressure of the stream that emerges from them. 1 Purposes of nozzles 1.1 High velocity nozzles 1.2 Pipe Nozzles 1.3 Magnetic nozzles 1.4 Spray nozzles 1.5 Shaping nozzles 1.6 Other meanings 2 See also Frequently the goal is to increase the kinetic energy of the flowing medium at the expense of its pressure energy and/or internal energy. Nozzles can be described as convergent (narrowing down from a wide diameter to a smaller diameter in the direction of the flow) or divergent (expanding from a smaller diameter to a larger one). A de Laval nozzle has a convergent section followed by a divergent section and is often called a convergent-divergent nozzle. Convergent nozzles accelerate fluids. If the nozzle pressure ratio is high enough the flow will reach sonic velocity at the narrowest point (i.e. the nozzle throat). In this situation, the nozzle is said to be choked. Increasing the nozzle pressure ratio further will not increase the throat Mach number beyond unity. Downstream (i.e. external to the nozzle) the flow is free to expand to supersonic velocities. Divergent nozzles slow fluids, if the flow is subsonic, but accelerate sonic or supersonic fluids. Convergent-dive..." 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