i.s~help me[火三角]

回答者001錯左一樣野:[水比油的密度低,因此水沉了下去]
水比油既密度是高的,因此水先會沉左落去。例如一個金,把它掉入水中,它是會沉到低的。咁係因為金既密度比水低。

(1)廚房中一個鍋裡的油著了火,第一樣野係要把火源既供應cut走,即係把煤氣掣熄左。第二,就係把周圍既易燃物品拿走,以免弄成更大形既火災。你應該用濕毛巾滅火,你用毛巾蓋在鍋子上,作鍋子既蓋子並不時加d水係條毛巾到(因為毛巾中的水會比火蒸發,到時,毛巾都會燒起身0.0) 此方法係令著了火的油冇左 氧。


(2)上述的火種,正如回答者001講錯左既物理現象:水比油的密度高,因此水沉了下去但受熱蒸發並彈左出>v<。

咁點解水沉了下去受熱會蒸發並彈左出呢?物質係氣體既情況下,因為受熱令粒子既運動速率增加。熱到油都著火,溫度係好高下+啦,整到水由液態轉成氣態。
粒子處於氣態中,運動既速率係好高,好快,因此落到去熱得濟上左油上(因為水係氣態中,密度係比液態既油低),但係快得濟,同一d油粒子一齊上左去,就係咁0.0

2010-09-28 20:35:35 補充：
我睇錯左,001,冇耳屎>v

1.Wet towel.Cover the pan with the towel.By covering it,fresh air cannot enter the flame,such that the fire cannot be sustained.
2. .It is because oil is less dense than water.When water is added,oil can still contact fresh air.

2010-09-28 19:31:31 補充：
2. The oil floats on the water since it is less dense, and this provides some opportunity to clean up the oil spills by skimming the oil from the surface of the water.

2010-09-28 19:32:18 補充：
more dangerously, since the splashed oil droplets contact with more oxygen, it'll burn more vigorously , causing a bigger fire or even explosion.