Tut says ! will rate! two insulated cylinders a and b with volumesva = 1.8 m3andvb = 5.6 m3contain chlorine gas at different pressures and temperatures. the cylinders are insulated (no heat is lost to or gained from the outside) and connected by a valve. initially, the valve is closed and the gas in the two cylinders has the following values: pa = 4.0 tut says ! will rate! two insulated cylinder 105 n/m2,ta = 210 k, pb = 2.5 tut says ! will rate! two insulated cylinder 105 n/m2,tb = 500 k. the valve is opened to allow the contents in the two cylinders to mix until the pressure equalizes. tut says ! will rate! two insulated cylinder(a) assuming there is no change in the temperatures of the containers themselves, determine the final temperature of the gas in the two cylinders. the atomic mass of chlorine gas is 35.4527 u. k(b) determine the final pressure. n/m2supporting materialsphysical constantsadditional materialsreading

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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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