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谁是肇事者?造成这次爆炸事故的肇事者是脱毛衣时产生的“静电”火花。因为车库里弥漫着大量的汽油蒸气,其含量达到了爆炸极限,所以一遇电火花便立即爆炸了。烛火为何熄灭?苏打和醋在杯中发生化学变化,产生二氧化碳气体。二氧化碳比空气重,不助燃,当它把空气中的氧气跟火焰隔绝以后,火便熄灭了。泡沫灭火器就是根据这个原理灭火的。它把充满二氧化碳的泡沫喷在火焰四周,使火焰同氧气隔绝,火便熄灭了。
Who is the perpetrator? The perpetrators of the explosion were the “static” sparks that were generated when sweaters were removed. Because the garage filled with a lot of gasoline vapor, its content reached the limit of explosion, so once the spark immediately exploded. Why the candle extinguished? Soda and vinegar chemical changes in the cup, producing carbon dioxide gas. Carbon dioxide is heavier than air and does not burn. After it isolates the oxygen in the air from the flame, the fire is extinguished. Foam fire extinguisher is based on the principle of fire. It splashes a foam full of carbon dioxide around the flame, isolating the flame from oxygen and extinguishing the fire.