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(1)发明点直接从测力计上读出液体密度值 ,达到液体密度和力两测量的目的。(2 )发明背景与原理大部分教师在初中物理浮力知识的教学中 ,常要求学生设计一些测定液体密度的实验 ,其中就有用弹簧测力计测液体密度的设计型实验 ,即 :用弹簧测力计分别测出一金属块在空中的重G、在
(1) The invention directly reads out the liquid density value from the dynamometer to achieve the purpose of measuring the liquid density and force. (2) BACKGROUND AND PRINCIPALITY OF THE INVENTION Most teachers in the teaching of physical buoyancy knowledge in junior high schools often require students to design some experiments to determine the density of liquids. Among them, there is a design experiment using the spring dynamometer to measure the density of liquids. The force meter separately measures the heavy G of a metal block in the air.