Q2/ One way to change the measurement range and sensitivity of a fluid manometer is by using fluids of different densities. As shown in the figure, a manometer is measuring the gage pressure of a compressed air tank 1 MPa ((p >> Patm)). This manometer would be set up between the tank and the atmosphere. What is the minimum tube length (L) needed for such a measurement? if the liquid in the manometer is: a) mercury used in the manometer (p = 13,500 kg/m3). b) water used in the manometer (p = 1000 kg/m3). c) Alcohols (p = 880 kg/m3). Atmosphere Gas 41 A manometer as set up to measure the pressure inside a tank of gas