1. why do you think uncertainty in measurement occurs? give at least two reasons [2 points] if x = 2.5 ± 0.1 cm and y = 3.1 ± 0.1 cm, and z = x + y, determine zo and the upper bound of δ 2. 1+1-2 points]. the volume of a cylinder is given by v = πγ21/4, where r is the radius and l is the length of the cylinder. if we measured r 2.10 ± 0.05 cm, and 1 = 3.40 ± 0.05 cm, determine the uncertainty in volume. show your calculation (hint: use equation 4] [2 points]. 3. 4. find the average and standard deviation of the following measurements: 12.3 cm, 13.1 cm, 12.6 cm, 13.0 cm, 12.5 cm, 12.9 cm.(1+1 2 points

gravititional force is a force that is acting around you, it is non-contactable and it is a force that pulls you to the core of the earth.

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igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods

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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the journeys of marquette, joliet and la salle a) new france expand.

all three of these explorers explored the midwest and the area around the great lakes, which they subsequently claimed for france.

this was a big portion of territory and expanded new france which before then only consisted of quebec province in northeastern canada