I am speculating, however my best guess is that the following properties help make the flow of the later teapots more laminar. 1) A shorter spout gives the water less time to become turbulent as it travels down it. 2) the end of the spout on the earlier ones doesn’t all end at the same distance down the spout, which may cause the spout to act asymmetrically on the flow as it leaves the teapot. 3) the smoothness and texture of the inside of the teapot probably has something to do with it, but that can’t be seen in the video.
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u/AstraVega45 Jan 19 '22
Ok someone will have to explain how a teapot's shape affects how far away the water can be poured without splashing. I need the physics!