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我们采用平抛球在运动中向竖直平面上被碱性溶液浸润的白纸喷射带酚酞的燃气,利用酚酞和碱作用,直接得到一条平滑、连续、鲜明的轨迹。此实验只要在原装置的基础上,改制一个能喷射燃气的平抛球即可。平抛球的制作:取一直径约20mm的钢球,钻一直径4mm的小孔,深度以不钻透为准,沿口攻一螺纹,再制一同直径螺栓,并在其中心钻一直径1mm的引信孔(见附图)。实验过程:1.按原教材安装好斜轨和竖直白
We use a flat tossed ball to spray gas with phenolphthalein on a white paper that is infiltrated with alkaline solution in the vertical plane. By using phenolphthalein and alkali, we can directly obtain a smooth, continuous and distinct trajectory. As long as the experiment is based on the original device, a flat ball can be remanufactured that can inject gas. Flat ball making: Take a steel ball with a diameter of about 20mm, drill a small hole with a diameter of 4mm, depth is not drillable, take a thread along the mouth, make a diameter bolt, and drill a diameter in the center 1mm fuze hole (see photo). The experimental process: 1. According to the original textbooks installed ramps and vertical white