Air with a density of 0.07 lbm/ft 3 is fl owing upward in the vertical duct, as shown. The velocity at the inlet (station 1) is 90 ft /s, and the area ratio between stations 1 and 2 is 0.3 (A 2 /A 1 =...

Air with a density of 0.07 lbm/ft³
is fl owing upward in the vertical duct, as shown. The velocity at the inlet (station 1) is 90 ft /s, and the area ratio between stations 1 and 2 is 0.3 (A₂/A₁
= 0.3). Two pressure taps, 10 ft apart, are connected to a manometer, as shown. The specific weight of the manometer liquid is 120 lb_f/ft³. Find the deflection, Δh, of the manometer.