As part of a carnival game, a =0.578 kgmb=0.578 kg ball is thrown at a stack of 25.3 cm25.3 cm tall, =0.363 kgmo=0.363 kg objects and hits with a perfectly horizontal velocity of ,i=12.3 m/s. vb, i=12.3 m/s. suppose the ball strikes the topmost object. immediately after the collision, the ball has a horizontal velocity of ,f=4.85 m/svb, f=4.85 m/s in the same direction, the topmost object has an angular velocity of =2.03 rad/sωo=2.03 rad/s about its center of mass, and all the remaining objects are undisturbed. if the object's center of mass is located =17.7 cmr=17.7 cm below the point where the ball hits, what is the moment of inertia of the object about its center of mass?

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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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