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纸是日常生活中常见的学习、办公用品,在实验教学中,利用它可以做很多的实验,效果不错。现将利用纸可做的有关实验介绍如下:一、演示测量圆柱体周长的实验器材:圆柱体、纸条、针、刻度尺.方法:将一纸条在圆柱体的侧面沿垂直中心轴方向绕一圈多,用针在纸条重叠处扎一个小孔,在水平面上展开纸条,用刻度尺测出两孔间的距离即圆柱体的周长.原理:等效替代思想.
Paper is a common learning and office product in daily life. In experiment teaching, it can be used to do a lot of experiments and the results are good. Now we will use paper to do the following experiments: 1. Demonstrate the measuring equipment for measuring the circumference of the cylinder: cylinder, paper strip, needle, scale. Method: Place a piece of paper on the side of the cylinder along the vertical center axis More than one direction in a circle, with a needle at the overlap of a piece of paper tie a hole in the horizontal surface of the paper, use a scale to measure the distance between the two holes that is the circumference of the cylinder. Principle: equivalent alternative ideas.