What Causes Fire to Produce Heat and Light?

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Fire produces heat and light due to the presence of glowing matter particles and plasma, which consists of highly energized molecules with free-moving outer electrons. The heat generated from fire is a result of exothermic chemical reactions, primarily combustion. Unlike electrical discharges, fire from a lighter does not conduct electricity. The phenomenon of fire encompasses both the visible flames and the underlying physical processes. Understanding these elements clarifies the nature of fire and its properties.
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I thought it might've been some kind of Ionized gas, hense the light and heat comming from it,

but I'm not too sure

http://www.youtube.com/watch?v=_2LpCdhuOyQ"
 
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According to http://www-spof.gsfc.nasa.gov/Education/FAQs7.html#q97", we give the name "fire" to both a bunch of glowing matter particles and a plasma, which is a bunch of molecules that are so hot that the outer electrons have been knocked off and move around freely. Fire from a lighter is not conducting electricity, fire as seen from an electrical discharge is.
 
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I think it's easist first to watch a short vidio clip I find these videos very relaxing to watch .. I got to thinking is this being done in the most efficient way? The sand has to be suspended in the water to move it to the outlet ... The faster the water , the more turbulance and the sand stays suspended, so it seems to me the rule of thumb is the hose be aimed towards the outlet at all times .. Many times the workers hit the sand directly which will greatly reduce the water...

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