A circular coil has a 8.79 cm radius and consists of 42.0 closely wound turns of wire. An externally produced magnetic field of magnitude 3.35 mT is perpendicular to the coil. (a) If no current is in the coil, what magnetic flux links its turns

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.