Mercury is poured into a u-tube. The left arm has cross sectional area A1 = 10 cm^2, the right has area A2, 5cm^2. 100 g of water are then poured into the right arm. determine the length of the water in the right arm and given the density of Hg = 13.6 g/cm^3, what distance h, does the mercury rise in the left arm. i have a diagram here and have calculated the length of the water in the right arm to be 0.2 m. i dont know now how to go about calculating the height that the mercury rises though. any help?