A 50 cm diameter, 100 cm high cylindrical tank is partially filled with 50 cm high liquid with density 870 kg/m^3. The tank is rotating about its vertical axis at a rate of 90 rpm.
a) Detrmine the liquid height at the center of the surfaces
b) Determine the liquid height at the edge
c) Determine the difference between the pressure at the center and the edge of the bottom surface