I have some questions regarding fluids. 1. This may seem like a dumb question, but what's the explanation (preferrably with calculations) on why a denser object sinks when placed in a less dense (presumably liquid) object in terms of buoyancy? 2. When I place a solid in a liquid such that it floats, how do I predict beforehand where the water level will be relative to the side of the solid. 3. I'm really shaky with water pressure and its relation to buoyancy. What's the role of water pressure in keeping something afloat? I know buoyant force keeps things afloat so what does water pressure do? Also, when something is sinking, how do we involve water pressure and buoyant force to calculate how fast it sinks (ignoring drag force). Any help is appreciated. Thanks.