It is desired to flow water at 200C with an average speed of 0.04 m/s through a horizontal pipe with a diameter of 50 mm and a length of 1800 m. The pipe material is unknown and a visual inspection reveals corrosion on the inside walls of the pipe. 1. If possible, calculate the pressure drop in the pipe. If this is not possible, explain why.
2. Sketch the velocity profile you would expect in the pipe (speed vs radius)
3. Under the typical assumptions for pipe flow calculations, could any of the flow be considered irrotational? Explain

Ashielded metal arc-welding operation is accomplished in a work cell by a fitter and a welder. the fitter takes 5.5 min to load components into the welding fixture at the beginning of the work cycle, and 1.5 min to unload the completed weldment at the end of the cycle. the total ength of the weld seams 1200 mm, and the travel speed used by the welder averages 300 mm/min. every 600 mm of seam length, the welding stick must be changed, which takes 0.8 min. while the fitter is working, the welder is idle (resting): and while the welder is working the fitter is idle. (a) determine the average arc-on time as a fraction of the work cycle time. (b) how much improvement in arc-on time would result if the welder used flux-cored arc welding (manually operated), given that the spool of weld wire must be changed every 10 weldments, and it takes the welder 5.0 min to accomplish the change? (c) what are the production rates for these two cases (weldments completed per hour)? attach your work and solutions.