Problem # p046

Hydrostatic Pressure

An open glass tube is attached to a water pipe as shown in the figure. What is the pressure in the water pipe at point A where tube and pipe are connected ? At the upper end the tube is open to the atmospheric pressure of 99 kPa and the water rises in the glass tube to a height of h=5m. Assume a water density of ρ=1000 kg/m³ and use g=9.8 m/s².