B. find the maximum dry unit weight and optimum water content. c. determine the moisture range permitted if a contractor must achieve 95% relative compaction based on standard proctor effort. d. determine what volume of water, in cubic feet, must be added to obtain 1 yd3 of soil at the maximum dry unit weight if the soil had an original water content of 10%. water content (%) wet unit weight (pcf) 10 98 13 106 1

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?