trevorjmendenhall trevorjmendenhall 18-11-2022 Physics Answered Water and then oil (which don't mix) are poured into a U-shaped tube, open at both ends. They come to equilibrium. Suppose that H = 25.7 cm and h = 8.72 cm . a) What is the density of the oil? [Hint: Pressures at points a and b are equal.]