A particle with charge of 7.70 microC and v= 435 m/s is acted on by both an electric and magnetic field. The particle moves along x axis in pos direction, the magnetic field points in pos y direction, electric field in pos z direction with magnitude of 8.10*10^3 N/C. If the magnitude of the net force experienced by the particle is 7.31*10^-2N, what is the strength of the magnetic field?