3. Two cylinders are filled with liquid water, p = 1000 kg/m³, and connected by a line

with a closed valve, as shown in Figure 1. A has 100 kg and B has 500 kg of water,

their cross-sectional areas are A₁ = 0.1 m² and AB=0.25 m² and the height h is 1 m.

P₁ = 101325 Pa, g= 9.81 m/s².

(a) Find the pressure on each side of the valve.

(b) The valve is opened and water flows to an equilibrium. Find the final pressure at

the valve location.