大多数学校实验室配备的固体热胀冷缩演示仪为一个铁环加一个铜球,它虽然演示效果明显,但有一定的局限性。我在教学逐步摸索制作了一个固体热胀冷缩演示仪,可以用来检验适当大小的固体的热胀冷缩现象。1、用铝合金管制作一个“h”形的架子(尺寸如图示,单位:厘米)制作成的架子应 Most school laboratories equipped with a solid thermal expansion and contraction of an iron ring with a copper ball, which although the demonstration effect is obvious, but has some limitations. I gradually developed in teaching a solid thermal expansion and contraction of the demo can be used to test the appropriate size of the solid thermal expansion and contraction phenomenon. 1, made of aluminum alloy tube “h” -shaped shelf (size as shown, units: cm) made of shelves should