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新编初中物理第二册第17页《小实验》(在水中的分币的像比它的实际位置浅),如果没有其办法加以辅助,倒水时往往会把分币冲浮而游动,达不到实验目的;即使慢慢倒水,保持分币在杯底的位置不动,同学对倒水后能看见分币(像),并随着水面的升高而上浮的现象,也往往怀疑为分币被水冲浮起来了,影响实验效果。为了避免这两个问题,我们在做这个实验时,把课文中的“在空的茶杯里放一枚分币”的做法改成“在空的
The new junior high school physics booklet, Volume II, “Small experiment” (the image of a cent coin in water is shallower than its actual position), if there is no way to assist it, the penny is often floated when swimming. , failing to achieve the purpose of the experiment; even if the water is poured slowly, keeping the position of the divisor at the bottom of the cup does not move, and the students can see the sub-currency (like) after pouring the water and rise with the rise of the water surface. It is often suspected that the sub-currency floated up, affecting the experimental results. In order to avoid these two problems, when we did this experiment, we changed the text of the book ”Put a coin into an empty teacup“ to ”empty"