In the mass spectrometer shown in the figure, a particle with charge-e = -1.60 10-19 C enters a region of magnetic field Bc that has a strength of 0.00205 T and points into the screen. The velocity v of the particle is confirmed with a velocity selector. The electric field E is 9.00 x 104 V/m (down) and the magnetic field By is 0.00690 T (into screen) in the velocity selector. Velocity Selector B If the radius r of curvature of the particle is 4.00 cm, calculate the mass m of the particle. Bc kg m =