At an oil tank farm, a vandal opens a valve at the end of a 5-cm diameter, 50-m long horizontal pipe from the bottom of a large diameter oil tank. The oil tank is open to the atmosphere, and the oil depth is 6.5 m. The oil has a SG = 0.85 and a kinematic viscosity of 6.8×10-4 m2/s. Neglecting minor losses, determine the initial flow rate from the tank (in m3/s).