2.) An object has a weight in air measured as 40 N, and an apparent weight when submerged of 28 N. 'What is the buoyant force acting on the object?

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.