A U-tube manometer indicates a pressure drop of 10 in. water across in an air filter. The air is at 26 C (degrees celsius) and a gauge pressure of 60 lbf/in^2. (a) What is the pressure drop in...

A U-tube manometer indicates a pressure drop of 10 in. water across in an air filter. The air is at 26 C (degrees celsius) and a gauge pressure of 60 lbf/in^2. (a) What is the pressure drop in lbf/in^2 and in atm? (b) What percentage of error is introduced if the density of the air in the manometer leads is neglected.