Question: Air is flowing through a circular duct with a diameter of 1.15 cm. The air has a velocity of 210 cm/s. Assume the fully

Air is flowing through a circular duct with a diameter of 1.15 cm. The air has a velocity of 210 cm/s. Assume

Air is flowing through a circular duct with a diameter of 1.15 cm. The air has a velocity of 210 cm/s. Assume the fully developed flow and the duct is hydrodynamically smooth. Calculate the following: a) entrance length in [cm] b) the friction factor

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