该视频最后水不漏出是如何做到的? http://v.youku.com/v_show/id_XNDMyOTk2MDMy.html?from=y1.2-1-94.3.19-2.1-1-1-18

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这个是可以的,前提是瓶身足够大,瓶口足够小,这种情况发生的几率并不低。

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http://education.jlab.org/frost/hid_anti-gravity_water_trick.html
↑官网上就有解释啊……

Joanna: Well, that was a lie.
Steve: What!?
Joanna: The problem is that the opening is just too large for surface tension to do the trick. What we need to do is divide the large opening into a bunch of smaller openings!
We'll do that by covering the opening with a piece of screen mesh.
Apply some hot glue to the jar's rim and smash it onto the screen while the glue is still warm.
Trim the excess off with a knife and you're done!
Now, the surface tension across the individual openings is enough to keep the water from coming out!


a piece of screen mesh=一个滤网/纱绷子/铁丝网……
把这片网子用胶粘牢在瓶口就好了,如果网眼够小,大气压强就会保持水不洒出来。有种自带滤网的水壶也可以玩这个——请确保你水壶里的滤网是那种全覆盖的(焊/粘在瓶子上或者用橡胶圈密封的),如果是那种用一个金属环卡在瓶口的就不行了,周围一圈的空隙太大。

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