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此装置用于“水的反常膨胀”的演示。制作方法在一小塑料药瓶侧面,上下并列开二个小孔,把两支温度计刻度对齐插入小孔,并用胶水把小孔密封。然后,取40×15×5cm~3的泡沫塑料块,一端挖凹槽,使小瓶一半卡入,另端用胶带固定温度计,在0℃、4℃处作出明显标记。装置如下图所示。使用方法取5℃以上的水倒入小瓶,然后把一冰块放入瓶内,盖好瓶盖。通过温度计可观察到水温逐渐降低,3—5分钟后,上层水温降至0℃,底层水温保持至
This device is used for demonstration of “abnormal expansion of water”. Production Methods In a small plastic bottle side, up and down side by side to open two small holes, align the two thermometers into small holes, and seal the hole with glue. Then, take a 40 × 15 × 5cm ~ 3 foam block, one end digging groove, the vial half of the card, the other end fixed with a thermometer, at 0 ℃, 4 ℃ made significant mark. Device as shown below. How to use Take more than 5 ℃ water into the vial, and then put an ice into the bottle, cover the bottle cap. Through the thermometer can be observed gradually decreased water temperature, 3-5 minutes later, the upper water temperature dropped to 0 ℃, the bottom water temperature to maintain