✔ 最佳答案
Material: Toothpick, wash basin, water, shampoo.
Step:
1.The wash basin packs into half of water and waits for a surface to fall calm.
2.Toothpick of put on the surface on carrying to be stained with some shampoo.
3.Toothpick will to don't be stained with shampoo of that carries headway and the speed is very quick and was very like a speed boat!
Principle:
The composition of shampoo has the interface live, can make the aqueous surface tension weakened.So the toothpick was stained with shampoo of that carries, the surface tension of neighborhood surface is weaker, another a carry surface surface tension stronger, therefore toothpick stronger that square lead and went forward.
2008-04-20 14:13:33 補充:
如有錯漏,,
不要見怪