Two parallel wires carry currents in the same direction. if the currents in the wires are 1a and 4a and the wires are 5 m apart. calculate the force between the 2 wires. is it attractive or repulsive? calculate the magnetic field midway between the wires.

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.