Answer #1

Its just a natural thing that happens with water because of surface pressure

Answer #2

It happens when the molecules are more attracted with other molecules, then that of the container. A good example is Mercury and glass, in barometers.

Answer #3

haha I totally thought you were talking about the kneeā€¦..Total brain fart! Yup, time for bed!

Answer #4

its surface tention

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