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玻璃的弹性可以用一个演示实验来证明。找一个玻璃瓶,充满着色水.再找一根玻璃管,直径越小越好,通过玻璃瓶的橡皮塞,插在瓶内.瓶内的水被迫流进玻璃管内,并留在管内。挤压一下瓶子,可以使玻璃管内的水上下移动,这就证明玻璃确有弹性。如果所用的是一个长方形横截面的瓶子,则瓶内容积的改变与瓶子所受挤压力的方向有关。如在短边一侧的面上受压,容积将减小,在长
The flexibility of the glass can be demonstrated with a demonstration experiment. Find a glass bottle filled with coloring water. Find a glass tube, the smaller the diameter, the better. Through the rubber stopper of the glass bottle, insert it into the bottle. The water in the bottle is forced into the glass tube and stay in the tube. Squeezing the bottle can move the water inside the glass tube, which proves that the glass is flexible. If a rectangular cross-section bottle is used, the change in the internal volume of the bottle is related to the direction of the pressing force of the bottle. If pressure is applied to the side of the short side, the volume will decrease and the length will decrease.