论文部分内容阅读
一、“利用内能做功”实验的改进在初三物理“利用内能做功”的实验中 ,给试管加热使水沸腾 ,水蒸气将软木塞顶出 ,本实验有以下不足 :( 1)若软木塞塞的不紧 ,木塞被顶出的现象不明显并且沸水会洒在讲桌上 ;若软木塞塞的过紧 ,需加热的时间长 ,并且沸水会随软木塞喷的较远 ,溅
First, the “use of internal energy to do work” experiment in the third in the physical “use internal energy to do work” experiment, the test tube heating to make the water boil, water vapor will cork out, this experiment has the following deficiencies: (1) If The cork stopper is not tight, the phenomenon of the cork being ejected is not obvious and the boiling water will spill on the table; if the cork stopper is too tight, the heating time is long, and the boiling water will be sprayed with the cork stopper farther. splash