Magnetic resonance imaging requires a magnetic field of about 1.5 t in the center of a current-carrying circular coil having n loops. if the radius of a single loop is a = 0.25 m, the total magnetic dipole moment μ associated with the coil is: a) 1.17 x 10^5 a . m^2 (b) 5.27 x 10^4 a . m^2 (c) 8.17 ×10^3 a . m^2

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?