8-41 Air enters a 10-m-long section of a rectangular duct of cross section 15 cm x 20 cm made of commercial steel at 1 atm and 35°C at an average velocity of 5 m/s. Disregarding the entrance effects, determine the fan power needed to overcome the pressure losses in this section of the duct. Answer: 2.55 W 15 cm Air 5 m/s 10 m 20 cm

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A: Please refer the attached image for complete solution.THANK YOU.

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Pressurized pipe flow

A 15-kilometer-long pipe with a pipe diameter of one meter transports water at a speed of one meter per second. The pipe has a friction coefficient of 0.005. Calculate the frictional head loss?