Chlorobenzene (density of 1109 kg / m3) and an aqueous
washing liquid (density of 1020 kg / m3) are separated
in a tubular centrifuge with an internal diameter of 150 mm which
rotates at 8000 r / min. The free surface of the liquid inside the
container is 40 mm of the axis of rotation. If the centrifuge
contains equal volumes of the two liquids,
What will be the radial distance from the axis of rotation to the
top of the spill zone of the heavy liquid?