Physics:The Publicity of Oxygen
The awesome effects of fire have long been used as symbols of power of destruction. But what is fire? What makes something burn? Aristotle and his followers for many centuries believed that fire was one of the four elements along with earth， air and water， from which all matters are composed. By the end of the 18th century， combustion has been conquered.
- Added：2006
- Country：Britain
- Duration：30
- Time of update：2011/8/25 14:48:22