You need to measure air flow velocity. You order a commercially available Pitot-static tube, and the accompanying instructions state that the airflow velocity is given by 

where h_v is the “velocity pressure” in inches of water and d is the density in pounds per cubic foot. The velocity pressure is the deflection measured on a water manometer attached to the static and total pressure ports. The instructions also state the density d can be calculated using

where pa is the barometric pressure in inches of mercury and T is the absolute temperature in degrees Rankine. Before you use the Pitot tube, you want to confirm that the equations are correct. Determine if they are correct.

Transcribed Image Text:

hy V(ft/min) = 1096.7 d