【摘 要】
:
人教版普通高中课程标准实验教科书《物理》(2005年6月第1版)选修3-3(在“分子的热运动”一节里),有一个关于液体扩散的传统实验。教材介绍:在烧杯中盛大半杯清水,然后用长颈
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人教版普通高中课程标准实验教科书《物理》(2005年6月第1版)选修3-3(在“分子的热运动”一节里),有一个关于液体扩散的传统实验。教材介绍:在烧杯中盛大半杯清水,然后用长颈漏斗慢慢地把蓝色硫酸铜溶液注入其中,使它留在杯底,不要搅动液体,几十分钟后观察两种液体的分界面的变化。笔者根据多年的教学实践发现,采用
PEP Ordinary high school curriculum standard experiment textbook “Physics” (1st edition, June 2005) Elective 3-3 (in the section “Thermal movement of molecules”), there is a traditional experiment on liquid diffusion. Textbook introduction: Fill half a glass of clear water in a beaker, and then use a long-necked funnel to slowly inject the blue copper sulfate solution into it to keep it at the bottom of the cup. Do not stir the liquid. Observe the interface between the two liquids after tens of minutes. The change. According to many years of teaching practice, the author found that
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