测量密度的方法,一般是先量出被测固体的质量和体积,然后用公式ρ=m/V算出密度.使用本方法,可迅速地从仪器的刻度上直接读出来.一、直读固体密度装置的构造和原理固体密度装置的构造,由刻有固体密度值的横梁、指示重锤、盛水的玻璃杯等组成,如图1所示.设重锤重量为P,被测固 The method of measuring the density is generally to measure the mass and volume of the measured solid first, and then use the formula ρ=m/V to calculate the density. Using this method, you can quickly read out directly from the scale of the instrument. The structure and principle of the density device The structure of the solid density device is composed of a beam with a solid density value, an indicator weight, a glass containing water, etc., as shown in Fig. 1. The weight of the weight is P, and the solid is measured.