Matty jogs 9 km/hr. compute matty's speed in m/s.
a. 2.5 m/s
b. 15.0 m/s
c. 25.0 m/s
d. 150.0 m/s

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.