An elevator does 9.75 X 10^ J of work on a person riding up to another floor. How much energy does the person gain?
A. OJ
B. 9.94 x 103J
C. 9.75 X 10^J
D. 9.56 x 10ʻJ

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.