Use the term "concentration" in a sentence about liquids that conveys its meaning. (9 points) least three examplaes of a selectively permeable material or iterm explan where it is found or used and why a selectively permeable material is needed

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm