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人教版9年级物理教材第13章第1节分子热运动“动手动脑学物理”栏目的一道习题,笔者对教学参考用书所给的答案存有异议.现将原题摘录如下,并将笔者进行的实验探究过程和一点想法付诸于笔端,与编者及广大读者商榷.题目.设法把干净的玻璃板吊在弹簧测力计的下面(例如用吸盘吸住玻璃板或用细线绑住玻璃板),读出测力计的示数.使玻璃板水平接触水面,然后稍稍用力向上拉玻璃板(图1所示).弹簧测力计的示数有什么变化?解释产生这个现象的原因.参考答案:弹簧测力计的示数会变大;因为玻璃板与水的接触面之间存在分子
People’s Education Edition ninth grade physics textbook Chapter 13 of the first chapter of the molecular thermal motion “manual brain science ” column of a problem, the author of the teaching reference book to give the answer there is objection. I will experiment with the author of the process of inquiry and some ideas put into the pen end, with the editor and the majority of readers to discuss. Try to hang a clean glass under the spring force gauge (such as sucker with glass or thin line Bind the glass plate), read out the dynamometer’s indication, make the glass plate level contact with the water surface, and then pull the glass plate slightly upward (as shown in Figure 1). What is the change of the spring dynamometer? Explain to produce this Reasons for the phenomenon Reference answer: The spring dynamometer shows a larger number; because there is a molecule between the glass plate and the water’s contact surface