A circle of diameter d =25 cm is scribed onto an unstressed square of 40cm*40cm aluminum plate if thickness t= 2cm. Force are applied to the plate such that the stresses in the x and y directions are 85MPa ahd 140MPa. If aluminum has a Young's modulus E=70 GPa and a poisson ratio v = 0.33, determine.

1) The change in the length of the circle diameter AB.
2) the change in the length of the circle diameter CD.
3)The change in the thickness of the plate
4) The change in the volume of the plate

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

i think it would be 5

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 !