Aparticular first-order reaction has a rate constant of 1.35 × 102 s−1 at 25.0 ∘c. what is the magnitude of k at 45.0∘c if ea = 55.5 kj/mol. a particular first-order reaction has a rate constant of 1.35 102 at 25.0 . what is the magnitude of at 45.0 if = 55.5 . 1.35 × 104 5.07 × 1053 5.53 × 102 190 1.35 × 102

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.