Water is an extremely weak electrolyte and therefore cannot conduct electricity. why are we often cautioned not to operate electrical appliances when our hands are wet

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.