You are asked to find a set of dimensionless parameters to organize data from a laboratory experiment, in which a tank is drained through an orifice from initial liquid level . The time, , to drain the tank depends on tank diameter, , orifice diameter, , acceleration of gravity, , liquid density, , and liquid viscosity, . How many dimensionless parameters will result? How many repeating variables must be selected to determine the dimensionless parameters? Obtain the parameter that contains the viscosity