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九年义务教育教材初中《物理》第二册(人教版)第13页图2—4所示的分子引力实验,此实验在高中也为演示实验。我按照一般做法,采用J2252型内聚力演示器,先用转刀将两个铅柱端面尽量削平刮光,再从边
Nine-year compulsory education teaching materials Junior middle school “Physics” Volume II (PEP) page 2 Figure 2 - 4 shows the molecular gravitational experiment, which is also a demonstration experiment in high school. I used the J2252 Cohesion Demonstrator in accordance with the general practice. First use a rotary knife to flatten the edges of the two lead columns as far as possible.