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一、原理 1.用游标卡尺测量铜管的长度L,外径D_1和内径D_2,各测量5次,从而求得铜管的体积如下: 铜管体积的平均值: 铜管体积的标准误差:
First, the principle 1. With a caliper to measure the length of the copper tube L, diameter D_1 and diameter D_2, the measurement of 5 times, so as to obtain the volume of the copper tube are as follows: Average copper tube volume: Standard deviation of copper tube volume: