UC知道用英语解释这几个现象 急急急急急急急急急急
来源：百度知道 编辑：UC知道 时间：2024/06/22 15:01:03
1.用一张纸盖住一杯水，把一只手放在纸上，然后把杯子倒过来，松开手，会有什么现象，为什么
2.把水和植物油倒在同一个杯子里，有什么现象，为什么
3.把一支粉笔放在水里24小时，有什么现象，为什么
4.一个杯子里装满淡水，另一个杯子里装满盐水，分别放一个冰块在里面，有什么现象，为什么
1. Water and paper will not fall, because the attraction between them.
2. Stratification ，because they are mutually soluble, but different density.
3. Chalk "melt", because water molecules to constitute a separate piece of chalk particles.
4. Ice floating in salt water even higher, because salt water density, buoyancy is large
1. A piece of paper covered with a glass of water, put a hand on paper, then put the cup reversed, release hands, the phenomenon of what, why
2. Put water and vegetable oil and pour it into the same cup, what the phenomenon, why
3. Put a piece of chalk on the water for 24 hours, there is what the phenomenon, why
4. A cup filled with fresh water, another glass filled with saline, respectively, put a block of ice inside, what the phenomenon, why