A particle with charge q and speed v enters a magnetic field of strength B, moving in a plane perpendicular to the field. A second particle with 5 times the charge and 1.7 times the speed, traveling in the same plane, enters the same field, but based on the radius of motion, the force has changed by a factor of 7.3. Find the magnitude of the new magnetic field B2 exerted on the second particle in terms of the magnitude magnetic field B1 acting on the first particle and supply the missing numerical factor below. B2 = ( )B1
