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现象一拿一个中型暖水瓶,装满水,用乒乓球堵在瓶口,把水瓶倾斜,乒乓球掉不下来,水也很少流出来;倾到水平,球仍掉不下来;把瓶口朝下,乒乓球还掉不下来,水也很少流出来,上下晃动,仍旧如此,如果暖水瓶中只装了半瓶水,同样,不管怎样晃,球也不会掉下。若正在向下倒水时,把球塞到瓶口,球像被瓶口吸引一样,紧紧的堵住瓶口,不让水外流。
Phenomenon I took a medium-sized thermos bottle, filled it with water, blocked it with a table tennis ball, tilted the water bottle, the table tennis ball fell out, and the water seldom flowed out; when it fell to the level, the ball couldn’t fall out; Under the table tennis can’t be dropped, the water seldom comes out, and it’s still shaking. If there’s only half a bottle of water in the thermos bottle, the ball will not fall anyway. If you are pouring down, put the ball into the bottle mouth, the ball is like to be attracted by the bottle, tightly plug the bottle, do not let the water outflow.