作业帮英语翻译有孔纸片托水 思考：有孔的纸为什么能拖住水?材料：瓶子一个、大头针一个、纸片一张,有色水一满杯 操作：1、在空瓶
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/21 08:26:54
英语翻译
有孔纸片托水
思考：有孔的纸为什么能拖住水?
材料：瓶子一个、大头针一个、纸片一张,有色水一满杯
操作：
1、在空瓶内盛满有色水.
2、用大头针在白纸上扎许多孔.
3、把有孔纸片盖住瓶口.
4、用手压着纸片,将瓶倒转,使瓶口朝下.
5、将手轻轻移开,纸片纹丝不动地盖住瓶口,而且水也未从孔中流出来.
讲解：
薄纸片能托起瓶中的水,是因为大气压强作用于纸片上,产生了向上的托力.小孔不会漏出水来,是因为水有表面张力,水在纸的表面形成水的薄膜,使水不会漏出来.这如同布做的雨伞,布虽然有很多小孔,仍然不会漏雨一样.
前面要带一些实验的简介,
有孔纸片托水
思考：有孔的纸为什么能拖住水?
材料：瓶子一个、大头针一个、纸片一张,有色水一满杯
操作：
1、在空瓶内盛满有色水.
2、用大头针在白纸上扎许多孔.
3、把有孔纸片盖住瓶口.
4、用手压着纸片,将瓶倒转,使瓶口朝下.
5、将手轻轻移开,纸片纹丝不动地盖住瓶口,而且水也未从孔中流出来.
讲解：
薄纸片能托起瓶中的水,是因为大气压强作用于纸片上,产生了向上的托力.小孔不会漏出水来,是因为水有表面张力,水在纸的表面形成水的薄膜,使水不会漏出来.这如同布做的雨伞,布虽然有很多小孔,仍然不会漏雨一样.
前面要带一些实验的简介,
Asked the water hole paper
Thinking:Why can a hole in the paper is holding water?
Materials:bottle 1,pin 1,paper 1,a glass filled with colored water
Operation:
1,filled with colored water inside the bottles.
2,with a lot of pin holes in the white paper bundle.
3,the paper covered a hole in bottle.
Four,hand pressing paper,the bottle upside down,so that bottle down.
5,the hand gently away,cover the mouth piece of paper as immovable,and stream water has not come out from the hole.
Explain:
Tissue pieces can hold up the bottle of water,because atmospheric pressure acting on the slip of paper,resulting in up to shore power.Holes will not leak water because water has surface tension of water formed on the surface of water in the paper's film,so that water will not leak out.This is like the umbrella cloth,cloth although there are many small holes,leaks still not the same.
Thinking:Why can a hole in the paper is holding water?
Materials:bottle 1,pin 1,paper 1,a glass filled with colored water
Operation:
1,filled with colored water inside the bottles.
2,with a lot of pin holes in the white paper bundle.
3,the paper covered a hole in bottle.
Four,hand pressing paper,the bottle upside down,so that bottle down.
5,the hand gently away,cover the mouth piece of paper as immovable,and stream water has not come out from the hole.
Explain:
Tissue pieces can hold up the bottle of water,because atmospheric pressure acting on the slip of paper,resulting in up to shore power.Holes will not leak water because water has surface tension of water formed on the surface of water in the paper's film,so that water will not leak out.This is like the umbrella cloth,cloth although there are many small holes,leaks still not the same.
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