Amagnetic field is uniform over a flat, horizontal circular region with a radius of 1.50 mm, and the field varies with time. initially the field is zero and then changes to 1.50 t, pointing upward when viewed from above, perpendicular to the circular plane, in a time of 130 ms. what is the average induced emf around the border of the circular region?

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.