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Weather. 24/7 Help. ... CROSSWORDS USA TODAY crossword. Play the USA TODAY Crossword Puzzle. Los Angeles Times crossword ... A range of climates (Distributed by Creators Syndicate) Kubok.
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Explore daily insights on the USA TODAY crossword puzzle by Sally Hoelscher. ... Weather. 24/7 Help. ... took it to the top of the charts in 1972. A version recorded by Club Nouveau reached number ...
The autoignition temperature or self-ignition temperature, often called spontaneous ignition temperature or minimum ignition temperature (or shortly ignition temperature) and formerly also known as kindling point, of a substance is the lowest temperature at which it spontaneously ignites in a normal atmosphere without an external source of ignition, such as a flame or spark. [1]
Flashover occurs when the majority of the exposed surfaces in a space are heated to their autoignition temperature and emit flammable gases (see also flash point). Flashover normally occurs at 500 °C (932 °F) or 590 °C (1,100 °F) for ordinary combustibles and an incident heat flux at floor level of 20 kilowatts per square metre (2.5 hp/sq ft).
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The maximum temperature of about 2,800 °C (5,100 °F) is achieved with an exact stoichiometric mixture, about 700 °C (1,300 °F) hotter than a hydrogen flame in air. [ 7 ] [ 8 ] [ 9 ] When either of the gases are mixed in excess of this ratio, or when mixed with an inert gas like nitrogen, the heat must spread throughout a greater quantity of ...