1994年全国奥林匹克物理知识竞赛试题(初三组)第四题:如图1所示,在一个容器中盛有水和煤油两种液体,在液体中有一块冰悬浮着.水、煤油、冰的密度分别为ρ水、ρ油、ρ冰,且ρ水>ρ冰>ρ油.试分析:当冰熔化时,水和油的分界面1高低变化情况及油面2高低变化情况.分析 因为水的密度大于冰的密度,而冰熔化成 The fourth issue of the 1994 National Olympic Physics Knowledge Contest (3rd 3rd Group): As shown in Figure 1, two liquids, water and kerosene, are contained in a container, and a piece of ice is suspended in the liquid. Water, kerosene, ice The density is ρ water, ρ oil, ρ ice, and ρ water> ρ ice> ρ oil. Test analysis: When the ice is melted, the level 1 of the interface between water and oil changes, and the level of oil level 2 changes. Because the density of water is greater than the density of ice, ice melts into