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用一些废旧物品制作一架高灵敏度不等臂天平,可用于测量微重固体的质量,比如头发;可以用来观测不同液体的挥发速度;可以用来测量空气的湿度。如下图所示:
Use some scrap items to make a high sensitivity range arm balance, can be used to measure the quality of microsolids, such as hair; can be used to observe the volatility of different liquids; can be used to measure the humidity of the air. As shown below: