Heated molecules are loosened, going aside to kind a gasoline. The gasoline molecules Blend with oxygen within the air causing burning. The invention of gunpowder in China led for the fire lance, a flame-thrower weapon courting to all-around 1000 CE which was a precursor to projectile weapons driven by burning https://basementventilation89011.daneblogger.com/35569534/the-definitive-guide-to-fire-rated-ductworth-insulation