实验一:完全失重实验1演示完全失重现象,通常是在一个矿泉水瓶瓶盖上和瓶身偏下部戳几个小孔,灌上大半瓶水后盖好带孔的盖子,使瓶子自由下落,引导学生观察瓶子在自由下落过程中没有水漏出。这一实验演示往往效果不佳,因为下落过程太短太快,学生很难通过肉眼观察到确实没有水漏出。我们的做法是,在让瓶子下落前,先突出演示“只要我们一移开堵住瓶盖上小孔的 Experiment 1: Total weightlessness experiment 1 demonstrates complete weightlessness phenomenon, usually in a mineral water bottle cap and the lower part of the cylinder poke a few holes, filled with half a bottle of water and then covered with a hole cover, so that the bottle free fall, Guide students to observe the bottle in the free fall without water leakage. This experimental demonstration is often ineffective because the drop process is too short and too fast for students to observe visually that there is really no water leakage. Our approach is to highlight the demo before dropping the bottle. ”As soon as we remove the small hole in the cap