A 100 Watt lightbulb has an average life of 2000 hours. How much energy does it consume over its lifetime? Give your answer in Joules

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.