This closed tank, which is 4 ft in diameter, is filled with water ( = 62.4 lbm/ft

This closed tank, which is 4 ft in diameter, is filled with water (ρ = 62.4 lbm/ft ³) and is spun around its vertical axis at a rate of 10 rad/s. An open piezometer is connected to the tank as shown so that it is also rotating with the tank. For these conditions, what is the pressure at the center of the bottom of the tank?

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6 in 4 ft diameter 12 in p= ?. 12 in