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浮沉子实验是一个综合实验,其实验原理涉及玻意耳-马略特定律、帕斯卡定律、浮沉原理及大气压强等知识。因此,做好这个实验是很必要的。我们用以下三种方法做好浮沉子实验,不但装置简单,方便易做,而且能激发学生学习兴趣。一、把一段蚊香(1厘米长)放到玻璃瓶中(酒瓶或汽水瓶),再往瓶里灌水(至瓶颈),然后用带有细玻璃管的橡皮塞塞紧瓶口。取一支注射器(大号的),先把活塞拉出1/2,然后用橡皮管把它与橡皮塞上的玻璃管连接起来(不要漏气)。推进活塞,瓶中气体压强增大,水的压
The floating subsidence experiment is a comprehensive experiment. The experimental principle involves the knowledge of the Bouillon-Marlow Law, Pascal’s Law, the floating-sinking principle, and atmospheric pressure. Therefore, it is necessary to do this experiment. We use the following three methods to do floating subsidence experiments. It is not only simple and easy to do, but it also stimulates students’ interest in learning. 1. Put a piece of mosquito repellent (1 cm long) into a glass bottle (bottle or soda bottle), fill the bottle with water (to the bottleneck), and then use a rubber stopper with a thin glass tube to close the bottle. Take a syringe (large size), first pull the piston out 1/2, then use a rubber tube to connect it with the glass tube on the rubber stopper (do not leak). Advancing the piston, the gas pressure in the bottle increases, the water pressure