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Air enters a 11-m-long section of a square channel of cross section 15 cm × 15...

Air enters a 11-m-long section of a square channel of cross section 15 cm × 15 cm made of commercial steel 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 channel if Reynolds number is 2000.

Please answer in detail, do not repost other work as it is not the same. Thank you.

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