The cylindrical water tank with a valve at the bottom shown in Fig. P5–116 contains air at the top part at the local atmospheric pressure of 100 kPa and water as shown. Is it possible to completely empty this tank by fully opening the valve? If not, determine the water height in the tank when water stops flowing out of the fully open valve. Assume the temperature of the air inside the cylinder to remain constant during the discharging process.

FIGURE P5–116

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H₂ = 4.5 m D = 40 cm Air at Patm Water A H₁ = 4 m