1. The problem statement, all variables and given/known data A container formed according to the figure, as two communicating vessels, is open. Both parts have a square cross section, with side 1.0 dm of the left part and 2.0 dm of the right. From the beginning, the container contains only water, and the two water surfaces is then at same level with each other (left image). 1 dm^3 olive oil, with a density of 917 kg/m3, is poured in the left part of the container, and wait until it settles on top of the water (right image). How big is the difference in height h? [ATTACH=full]161359[/ATTACH] 2. Relevant equations F = ρVg P = F/A=ρVg/A=ρgh ρ = m/V 3. The attempt at a solution Converting all information to the same units we get; F =ρVg = 917*(0.1)^3*9.81≈ 9 N Using not that the pressure is given by P = F/A=ρgh = 9/(0.1^2)=900=917*9.81*h which gives h=0.1m=1dm. Wrong solution by far. What have I actually calculated?