Can it be hollow AND flat?
Do you believe in gravity? Or is it density & buoyancy?
Water conforms to interior of objects, not exteriors. And on top of that the weakest force of gravity is enough to overcome centrifugal forces while on the exterior of an object? GOLLY
Because it doesn’t exist and theory of relativity is a beggar in King’s robes. Just ask Tesla. Interesting how such a weak force holds the “universe” together. KEK