Consider a manometer containingthree liquids with known densities p1, p2 and p3, in a tube ofuniform diameter, as shown in the figure. a) Given the air pressure, pA, and the heights of all liquidcolumns, determine the air pressure pD. b) If both ends of the manometer are opened to the atmosphere (pA =pD), determine the new heights of the liquid columns, in terms ofthe previous parameters. (For this question, only the formulationof a system of equations sufficient for solving the problem andsome explanations on how to solve the system were expected).
