Water at 30°C is being pumped through a 30 m section of 19.49 cm. diameter steel pipe at a mass flow rate 0.07 kg/s. Density and viscosity of water at 30°C are 997.5 kg/m³ and 0.000792 Pa-s. The relative roughness of steel pipe is 4.6 x 10-5 m. Evaluate the friction factor. Express answer in exponential form with 2 decimal places.

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