2. A manometer containing mercury ( = 13,600 kg/m3 ) is attached to an air duct to estimate the pressure. The high of the differential column is 15 mm, and the !"# is 101 kPa. (a) Departing from figure, determine whether the pressure in the duct is higher or lower than the atmospheric pressure. (b) Determine the absolute pressure in the duct.

In every exercise, you must highlight your main assumptions, highlight the given data and unknowns, draw a sketch, present your equations in full form, and specify the units in every step. A brief discussion of your findings is encouraged.