Length of a horizontal arm of a tube is L and ends of both the vertical arms are open to atmospheric pressure Po. A liquid of density ρ is poured in the tube such that liquid just fills the horizontal part of the tube as shown in figure. Now one end of the open end is sealed and the tube is then rotated about a vertical axis passing through the other vertical arm with angular speed ω. If the liquid rises to a height h in the sealed arm, find the pressure in the sealed tube during rotation.