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本演示器构造简单,制作方便,一物多用,可进行10多项实验演示,反复实验性强,可见度大,现象明显,测得数据准确,紧扣教材,教学效果好,曾获省级教具制作奖,列为推广项目.现将选材及制作,实验项目介绍如下.一、选材及制法薄铁皮用锡焊成4×4×6(厘米~3)的长方体小筒.(也可做成圆柱形)筒内焊两隔板,将筒分成相互密闭的三室.筒两端蒙上橡皮膜用线托紧.在一侧面中线每室中间各开一小孔,小
This demonstrator is simple in structure, easy to make, multi-purpose, and can be used for more than 10 experimental demonstrations. It has repeated experiments, strong visibility, obvious phenomena, accurate measured data, tight teaching materials, and good teaching effect. It has won provincial teaching aids. Production awards are listed as promotional items. Now selection and production, experimental projects are described as follows. First, material selection and manufacturing methods Tin sheets are soldered into 4×4×6 (cm~3) rectangular parallelepipeds. (Also available Into the cylinder) welding two partitions in the cylinder, the cylinder is divided into three chambers sealed each other. The ends of the tube covered with a rubber membrane with a tight line. In the center of a side of each room to open a small hole, small