Attempt 3
you are designing the section of a roller coaster ride shown in the figure. previous sections of the ride give the train a speed
of 13.7 m/s at the top of the incline, which is h = 35.5 m above the ground. as any good engineer would, you begin your
design with safety in mind. your local government's safety regulations state that the riders' centripetal acceleration should
be no more than n = 1.93 g at the top of the hump and no more than n = 5.37 g at the bottom of the loop. for this initial
phase of your design, you decide to ignore the effects of friction and air resistance.
what is the minimum radius you can use for the semi-
circular hump?

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”.

hope this !

the correct answer is "inertia"