1创新演示1:用浸漆铜圈做浮币实验小时候常玩的“硬币能浮在水面上”是一个非常新奇有趣的小实验,但现在市场上流通的新版硬币材质不同于早起的铝质硬币,其密度太大了,再做浮币实验难度较大.为了让每个学生都能轻易体验观察到表面张力,笔者改用浸漆铜圈来代替硬币,实验效果更好. 1 Innovative Demo 1: Doing a Float Experiment with a Copper-Coated Punch I used to play “coins can float on the water”, which is a very novel and interesting experiment. However, the new coin circulating on the market is different from the earlier In order to allow each student to easily observe the surface tension, the author uses the dip copper ring instead of the coin, the experimental effect is better.