Why does a landslide occur? What role do the Atterberg limits play? How does re-sloping a hill affect the stability of the hillside?The referenced cucaracha shale in the reading is primarily composed of a material known as smectite clay, which has the ability to swell in the presence of water. The Culebra Cut experienced hundreds of landslides over time, both big and small. Every time a landslide occurred, the Canal would be dredged (or scooped out) and the slopes of the Culebra cut would be re-shaped. The "slide-dredge-reslope" cycle continued throughout the construction of the Canal, resulting in the excavation of nearly 98M cubic yards! The average rainfall in Panama is 105.5 inches. Based on your understanding of the Atterberg Limits, explain the cause(s) of the repeated landslides in the Culebra cut using 2 paragraphs (no more than 3). Your argument must be clear, concise and rooted in science.

Apiping systems consists of 6 m of 6-std type k and 12 m of 4-std type k, both drawn copper tubing. the system conveys ethylene glycol at a rate of 0.013 m3/s. the pressure drop across the system is to be calculated. there are two 90° elbows in the 6-in pipe, a reduction from the 6-in pipe to the 4-in pipe and four 90° elbows in the 4-in pipe. all fittings are soldered (same as flanged) and regular. the inlet and outlet of the system are at the same height.

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.

Technician a says that in a worm gear steering system, most excessive steering free play is usually found in the gearbox. technician b says that in a rack-and-pinion steering system, excessive free play can be found in the bushings. who is correct?