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1.在农业生产中,人们经常用盐水选种,所需的盐水可以利用浓度或密度来标注.现在有一种盐水,要求测定它的密度.陈佳说她可以用密度计直接测量,陶然说他还有别的方法.请你从陶然的角度来设计一个实验测量方案.(1)写出你选用的器材;(2)简述实验步骤.解本题答案是开放的.(1)器材:天平、量筒.(2)实验步骤:首先用天平测量盐水的质量为m,然后用量筒测出盐水的体积为V,最后代入公式ρ=m/V算出被测盐水的密度.
1. In agriculture, people often use salt water for seed selection, and the salt water needed can be labeled with concentration or density. There is now a salt water that requires its density to be measured. Chen Jia says she can measure directly with a densitometer He also has other ways .Please you from a tantalizing point of view to design an experimental measurement program. (1) Write your choice of equipment; (2) Briefly experimental steps. The answer to this question is open. (1) Equipment: Balance, graduated cylinder. (2) Experimental procedure: Firstly, measure the mass of brine with balance, then measure the volume of brine with measuring cylinder as V, and finally calculate the density of the measured brine by substituting the formula ρ = m / V.