1. The problem statement, all variables and given/known data There is a figure of a cylinder of liquid partially immersed in a beaker of a fluid. Why is there a force that pushes up on the cylinder of liquid in the beaker? Multiple choice: 1. The weight of the liquid cylinder and the atmospheric pressure acting on the cylinder is balanced by a force the rest of the liquid exerts back on the cylinder. 2. Normal force the glass exerts back on the liquid. 3. The weight of the liquid cylinder is balanced by a force the rest of the liquid exerts back on the cylinder. 4. Atmospheric pressure. 2. Relevant equations None 3. The attempt at a solution I think it is 3 because atmospheric pressure doesn't change I think because the surface area for the air to push down stays the same which would eliminate 1 and 4. 2 Doesn't seem like that is what happens. I know the forces acting on the cylinder are: Down: Weight of cylinder + atmospheric pressure Up: Fluid on cylinder (I think it is buoyancy) I really need help, been stuck thinking about this for a long time. My teacher also gave me a hint that is wasn't #1.