8.52 A 12 in. × 6 in. Venturi meter is installed in a horizontal waterline.

The pressure gages read 30 and 20 psi. Calculate the flow rate for a water temperature of 68 F and the head loss between the base and throat of the meter. Calculate the flow rate if the pipe is vertical with the throat of the meter 2 ft below the base and the pressure gages read the same values.