探究液体和空气浮力的实验装置

Experimental device of exploring buoyancy in liquid and air

针对教材中测量液体和空气浮力实验中存在的问题,做了相应的改进.首先,改进了探究液体浮力的实验装置,采用体积较大的物体作为研究对象,利用铁架台固定弹簧秤,并通过连通器注入液体,实现了稳定清晰地观测液体浮力现象.其次,设计了探究气体浮力的实验装置,收集VC泡腾片与水反应产生的气体,并充入气球,由于气球受到浮力导致杠杆变化,进而可以明显观察到气体的浮力现象.

Some improvements have been made to solve the problems in measuring the buoyancy force in liquid or air experiments in the textbook.Firstly,the experimental device for exploring the buoyancy in liquid was improved.A larger object was used as the research object,the spring balance was fixed by iron frame,and the liquid was injected through communicating device.By these means,the buoyancy in liquid could be observed stably and clearly.Secondly,an experimental device for exploring the buoyancy in air was designed.The air generated by the reaction between the vitamin ceffervescent tablet and the water was collected and filled into the balloon.As the balloon was subjected to buoyancy,the lever was changed,and the buoyancy in air was observed.