自制表面张力演示仪和稳定度判定仪

介绍了第3届大学生物理教学技能大赛中韩山师范学院参赛的利用身边材料自制的表面张力演示仪和稳定度判定仪.表面张力演示仪是用饮料瓶和钢丝网制成的,当瓶子倾斜时,水将流出,但若瓶子倒立时,由于水的表面张力,水反而不会流出.而稳定度判定仪是利用螺纹铁棒和木框组合而成,在稳定度判定仪的重心位置安装了一盏小灯,利用小灯在支撑面上灯光的投影来判断装置是否稳定.

Self-made surface tension demonstration instrument and stability judgment instrument

Using accessible materials,surface tension demonstration instrument and stability judgment instrument,which were the proposals of Hanshan Normal University presented in the 3rd Physics Teaching Skills Competition of College Students,were introduced.The surface tension demonstration instrument was made of beverage bottle and steel mesh.When the bottle was tilted,the water in the bottle would flow out.But when the bottle was turned upside down,the water was unable to flow out anymore due to the surface tension.The stability judgment instrument was made of iron bar and wood frame.A lamplet was placed at the centre of gravity of the stability judgment instrument.The lamplight on the supporting surface was used to judge the stability of the instrument.