A pipe operates at steady-state, steady-flow conditions. Steam enters the pipe at 300 oC and 250 kPa, and exits at 250 oC and 200 kPa. The volumetric flow rate of the steam entering the pipe is 1.2 m3/s. Assume that there are no work interactions. Determine the heat transfer rate to or from the pipe.(b) Using your equations, plot the rate of heat transfer for the same inlet conditions and outlet pressure, but for outlet temperatures varying from 150°C to 350°C.

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.