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Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction products.
A flame (from Latin flamma) is the visible, gaseous part of a fire. It is caused by a highly exothermic chemical reaction made in a thin zone. [1] When flames are hot enough to have ionized gaseous components of sufficient density, they are then considered plasma. [vague] [2]
The fire triangle or combustion triangle is a simple model for understanding the necessary ingredients for most fires. [1] The triangle illustrates the three elements a fire needs to ignite: heat, fuel, and an oxidizing agent (usually oxygen). [2] A fire naturally occurs when the elements are present and combined in the right mixture. [3]
Enfilade fire—gunfire directed against an enfiladed formation or position—is also commonly known as "flanking fire". [1] Raking fire is the equivalent term in naval warfare. Strafing, firing on targets from a flying platform, is often done with enfilade fire. It is a very advantageous, and much sought for, position for the attacking force.
A 10-75 is a working fire (i.e., there is fire visible from a building), the 10-76/10-77 assignments are the alarm levels separate from the first alarm, second alarm, third alarms, etc. that are the standard fire department responses to fires in high-rise buildings. The signal 10-60 is a separate response to major disasters.
The fire of the Cathedral of Notre-Dame de Paris was a violent fire that erupted in the Cathedral of Notre-Dame de Paris. It began at the end of the afternoon of April 15, 2019, on the roof of the building, causing considerable damage. The cathedral's needle and roof collapsed, and the interior and artefacts it housed were severely damaged.
Fires include the collective and coordinated use of target acquisition systems, direct and indirect fire weapons, armed aircraft of all types, and other lethal and nonlethal means. Fires are normally used in concert with maneuver, which helps shape the battlespace, setting conditions for decisive action."
Fire ecology is a scientific discipline concerned with the effects of fire on natural ecosystems. [1] Many ecosystems, particularly prairie, savanna, ...