In the pendant drop technique for measuring the oil-water interfacial tension (IFT), the drop remains attached to the pendant drop tube (syringe or needle), at which point it is dimensioned. However, the drop eventually breaks away when the suspended weight of the drop (due to gravity force) is no longer supported by the IFT force. For one such experiment, the following data were obtained: inside diameter of the pendant drop tube = 0.10 in.; drop diameter at the point of breaking away = 0.22 in.; pw = 1.05 g/cm3; and po = 0.85 g/cm3. Calculate the oil-water IFT.