• A pressure tapping is taken from a measuring point by means of a tubing 50 cm long, 5 mm bore to a U-tube manometer using water as the working liquid. The tubes are of 10 mm bore. To start with, the water level is 30 cm below the top of the tube. Taking viscosity of air as 1.78 x 10-5 kg/m-s,
• Required: find the time constant of the system if a small change occurs in the pressure which is around atmospheric

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