1. Mark each point on the d-t graph where the slope of the graph changes (these are actually points where the vclocity of the object changes).

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.