The spectrophotometer really measures the percent of light that is transmitted through the solution. the instrument then converts %t (% transmittance) to absorbance using the relationship you determined in the prelab exercise. if the absorbance of a sample is 0.85, what is the percent light transmitted through the colored sample at this collected wavelength.

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.