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初中物理中经常有配制盐水密度的题目,如测某些不规则的且密度略大于水的物体的密度,象鸡蛋、塑料块等等,因一般情况下,盐水的密度可配制在(1～1.2)克/厘米~3之间.在农村用它选种去瘪粒也是可行的方法.题目:给一根均匀木棒,一段体积可忽略不计的细铜丝、量筒、烧杯、水和盐配制密度为1.1×10~3千克/米~3的盐水,这类题目对于初中学生常常会束手无策,找不到具体的思维方法,本文就此题的设计提供方法供大家参考.
In junior high school physics, there is often a problem of formulating brine density, such as measuring the density of certain irregular objects with a density slightly larger than that of water, such as eggs, plastic blocks, and so on. Under normal circumstances, the density of salt water can be formulated in (1~ 1.2g/cm~3. It is also a feasible method to choose seeds and seeds in rural areas. Title: Give a uniform wooden rod, a small volume of fine copper wire, measuring cylinder, beaker, water and salt Preparation of salt density 1.1 × 10 ~ 3 kg / m ~ 3 of salt water, this type of problem for junior high school students are often helpless, can not find a specific way of thinking, this article on the design of this topic provides methods for your reference.