As an astronaut travels far away from earth, her weight.
a. decrease because gravity decreases.
b. decreases because the mass decreases.
c. increases because gravity increases.
d. remains the same because her mass remains the same.

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.