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密度是初中科学科物理部分的一个重要概念,而密度的常规测量过程更是一个考查的重点,另外,综合运用浮力、质量等知识,用非常规方法测量密度,可以很好地锻炼学生灵活运用知识的能力,对培养学生的学习兴趣也很有帮助。一、密度测量常规方法1.密度大于水的固体密度测量方法(1)用天平测出被测物体的质量m(2)用量筒采用排水法V(3)用公式ρ=m/V计算出物体密度2.密度小于水的固体密度测量方法
Density is an important concept in the physics of junior middle school sciences, and the conventional measurement of density is more of a test focus. In addition, by comprehensively using knowledge of buoyancy and quality and measuring density by unconventional methods, it can be used flexibly by students Knowledge of the ability to develop students interest in learning is also very helpful. First, the density measurement of conventional methods 1. Density greater than water density measurement of solid (1) measured by the balance of the mass of the measured object m (2) The use of displacement gauge cylinder V (3) calculated using the formula ρ = m / V Object density 2. Density is less than the water density measurement method