A particle of mass 11.2 g and charge 71.3 μC moves through a uniform magnetic field, in a region where the free-fall acceleration is −9.8 j^ m/s2 without falling. The velocity of the particle is a constant 19.2 i^ km/s, which is perpendicular to the magnetic field. What, then, is the magnetic field? Number ( i^+ j^+ k^) Units