In Figure 21.97 a particle with a charge of nC travels to the left in a straight line at constant speed through a region where the electric field is 3800 V/m in the −y direction and the magnetic field...

In Figure 21.97 a particle with a charge of nC travels to the left in a straight line at constant speed through a region where the electric field is 3800 V/m in the −y direction and the magnetic field is 0.4 T in the +z direction. What is the speed of the particle?