It is known that when a liquid with an initially horizontal surface is rotated in a cylindrical container, the rise of the liquid surface on the wall of the container is equal to the fall of the...

It is known that when a liquid with an initially horizontal surface is rotated in a cylindrical container, the rise of the liquid surface on the wall of the container is equal to the fall of the liquid surface at the center of the container. Consider an 850-mmdiameter cylindrical container with an initial depth of water equal to 1.2 m. At what rotational speed does the water surface at the center of the container intersect the bottom of the container?