Air flows at a rate of 3 kg/s through a smooth contraction in a pipe with negligible friction losses (the pipe diameters are D 1 = 0.4 m and D 2 = 0.2 m, as in problem XXXXXXXXXXThe pressure...

Air flows at a rate of 3 kg/s through a smooth contraction in a pipe with negligible friction losses (the pipe diameters are D₁
= 0.4 m and D₂
= 0.2 m, as in problem 4.35). The pressure difference between the two sections is measured by two tubes connected to a water manometer. Calculate the height
h measured between the two vertical tubes (assume the air density is 1.22 kg/m³).

Air flows through a smooth contraction in a pipe with negligible friction losses, and the pressure difference between the two vertical tubes of problem 4.35 is measured at
h = 0.3 m. If the pipe diameters are D₁
= 0.3 m and D₂
= 0.2 m, calculate the flow rate (assume the air density is 1.22 kg/m³).