1. The problem statement, all variables and given/known data An electron has a velocity of 1.2 * 10^4 m/s ( in the positive x direction ), and an acceleration of 2 * 10 ^ 12 m/s^2 ( in the positive z direction ) in a uniform electric and magnetic field. If the electric field has a magnitude of 20 N/C ( in the positive z direction), what can you determind about the magnetic field in the region? what can you not determine? 2. Relevant equations F = qE + qv x B 3. The attempt at a solution I need the force quantity to figure out the problem, but am lost besides this. Can someone offer a little help. Thanks.