Cee 220homework assignment no. 8spring 2019problem setfor all problems, write a problem statement, provide sketches, and comment on your thought process. draw free body diagrams as applicable.1.bending of retaining wallcantilever concrete retaining walls are commonly used to hold water or soil pressures. the figureshown below indicates an application of such concrete walls in water reservoir construction. such wallsshould be designed in such a way no tension stress occurs in the wall. the retaining wall shown in thefigure can be simplified as a rectangular solid concrete wall. determine the minimum thickness of thewall, if there is no tension at the base of the wall. (γwater

bacteria that live on the ocean floor are sustained by phytoplankton. phytoplankton, microscopic marine photosynthetic organisms, have a vastly significant role to play not only in the marine food web of which they’re part of, but also on a more global scale. despite their infinitely small size in comparison to other marine organisms, these tiny creatures occupy an immensely important ecological niche: they are the foundation of the marine food web, and as primary producers, play key roles in supporting all other organisms in the marine environment, as well as in the regulation of the earth’s climate through the sequestration of carbon, oxygen production, and other related processes. phytoplankton account for roughly half of all global primary productivity; therefore, their significance extends far beyond the marine environment alone. there is an intriguing sense of irony in the realization that these tiny living beings that often live out their existence unnoticed and undetected by the rest of the world, have such a far-reaching impact on the lives of virtually all other living organisms on the planet, particularly on those in the marine environment. the world that we have become accustomed to has been and is continuously shaped by the workings of these miniscule yet vital “plants of the sea”.

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