Learning Outcomes Used in This Problem: 1. Evaluate flow in parallel 2. Relate Reynolds number and friction factor for the appropriate flow regime 3. Determine pressure drop given average flow rate information A reverse-osmosis unit for purifying brackish water has about 900,000 hollow fibers that permit the diffusion of water but reject most of the salt. The fibers are 85m in outside diameter, 42m in inside diameter, and about 3ft long. The average flow through the tubes is 2,000 gal of water every 24h when the feed pressure is 400 psig. What is the pressure drob within an individual fiber from the feed end to the discharge end