Fire

Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. Slower oxidative processes like rusting or digestion are not included by this definition.

Fire is hot because conversion of the weak double bond in molecular oxygen, O₂, to the stronger bonds in the combustion products carbon dioxide and water releases energy (418 kJ per 32 g of O₂); the bond energies of the fuel play only a minor role here. At a certain point in the combustion reaction, called the ignition point, flames are produced. The flame is the visible portion of the fire. Flames consist primarily of carbon dioxide, water vapor, oxygen and nitrogen. If hot enough, the gases may become ionized to produce plasma. Depending on the substances alight, and any impurities outside, the color of the flame and the fire's intensity will be different.

Fire in its most common form can result in conflagration, which has the potential to cause physical damage through burning. Fire is an important process that affects ecological systems around the globe. The positive effects of fire include stimulating growth and maintaining various ecological systems. Fire has been used by humans for cooking, generating heat, light, signaling, and propulsion purposes. The negative effects of fire include hazard to life and property, atmospheric pollution, and water contamination. If fire removes protective vegetation, heavy rainfall may lead to an increase in soil erosion by water. Also, when vegetation is burned, the nitrogen it contains is released into the atmosphere, unlike elements such as potassium and phosphorus which remain in the ash and are quickly recycled into the soil. This loss of nitrogen caused by a fire produces a long-term reduction in the fertility of the soil, which only slowly recovers as nitrogen is "fixed" from the atmosphere by lightning and by leguminous plants such as clover.

Dave

Dave may refer to:

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Hot

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Chappelle's Show

Chappelle's Show is an American sketch comedy television series created by comedians Dave Chappelle and Neal Brennan, with Chappelle hosting the show as well as starring in the majority of its sketches. Chappelle, Brennan and Michele Armour were the show's executive producers. The series premiered on January 22, 2003, on the American cable television network Comedy Central. The show ran for two complete seasons and a third, truncated season (dubbed "The Lost Episodes").

After numerous delays, production of the third season of the show was abruptly ended when Chappelle left the show. Three episodes were compiled from the completed work and these episodes aired from July 9 to July 23, 2006. Re-runs have frequently aired on Comedy Central and around the world, with episodes airing on MTV in Germany, Comedy Central in Brazil, The Comedy Network & MuchMusic in Canada, The Comedy Channel and 7mate in Australia, and FX in the United Kingdom.

Chappelle's Show was also shown on WGN America and was syndicated to various television stations across the U.S. including MyNetworkTV. TV Guide ranked it #31 on their list of "TV's Top 100 Shows".