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A large tank of (height h(1)=4m ) water ...

A large tank of (height `h_(1)=4m` ) water has a hose connected to it,as shown in figure.The tank is sealed at the top and has compressed air between the water surface and the top.When the water height `h_(2)` is 3m ,the gauge pressure of air `P_(1)=10^(5)N/m^(2)` .Assume that the air above the water surface expands isothermally. The velocity of flow,out of the hose when `h_(2)` has decreased to 2m is `sqrt(xg)`. Assume ideal fluid flow and `P_(atm )=10^(5)N/m^(2)` .The value of x is (Neglect viscosity of liquid)

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