Air at 80of is to flow through a 2-ft pipe at an average velocity of 6 ft/s. what size pipe should be used to move water at 60of and average velocity of 2.9 ft/s if reynolds number similarity is enforced?

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).