(a) An open circular cylinder of 15 cm diameter and 100 cm long contains water upto a height of 70 cm . Find the speed at which the cylinder is to be rotated about its vertical axis, so that the axial depth becomes zero.
Explanation
Given: Diameter of the cylinder = 15 cm, Length of the cylinder = 100 cm, Water height = 70 cm. To find: Speed of the cylinder. The speed of the cylinder can be calculated using the equation for the formation of a vortex.
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