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你发现了吗?在我们周围有很多像饮料罐、矿泉水瓶这样的废弃物.如果随手扔掉,不仅浪费了资源,还会污染环境.如果我们用心稍加处理,就可以变废为宝了.下面介绍我利用饮料罐和矿泉水瓶制作的几种初中物理教具.1.圆柱形弹簧测力计取一根钢丝退火(用火烧红后自然冷却)后,在一个比饮料罐直径稍小的木棒上密绕8圈左右,得到一根弹簧(操作过程中要注意安全,也可以直接用废旧弹簧),取下弹簧用火烧红
Did you find out? There are a lot of waste around us like beverage cans and mineral water bottles. If you throw away, it will not only waste resources, but also pollute the environment. If we carefully deal with it, we can turn waste into treasure. Here are some of my junior high school physics teaching aids made with beverage cans and mineral water bottles. 1. Cylindrical spring dynamometers take a wire to anneal (after cooling with a red fire), in a smaller diameter than the beverage can About 8 rounds around the stick, get a spring (safety during operation, you can also directly use the waste spring), remove the spring with fire red