How does the movement of molecules inside a solid block of iron change as the iron is heated? a. the molecules move faster. b. the molecules move slower. c. the molecules stop moving completely. d. the molecules move in the same way at all temperatures.

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.