1. An electron moves west at 6.9 x 10⁵ m/s through a magnetic field directed [W75^oN] with strength of

1.3 x 10^-2 T. What magnitude and direction would the electron experience a magnetic force?

\f4. Sphere A of mess [LSD kg hangs from a thread as seen in the diagram below. Sphere A has a charge of 5.0 uC and sphere B has e charge of 4.43 uC. What angle will the string make with the well? threed ill[1.23 mIr Two horizontal plates of opposite charge form a constant electric eld [I = l MIC directed verticallv downwards. An electron of mass m, and charge e ' is red horizontally.r with velocityr v = illc, where c = 3.00 x 113' mfs between the plates. Calculate the electrons acceleration. Ifthe plates have length 1 m, find the electron's deflection from the horizontal when it emerges. Consider a mass spectrometer used to separate the two isotopes of uranium. mu\" {3.352 it 10'\" kg} and 1351.13\" [3.903 x 14125 kg]. Assume the ions enter the magnetic field region of strength 10.5 T. which is perpendicular to velocitv of the ions, with identical speeds and leave the spectrometer with a separation of 2.2 mm {as measured from the entryr point} after completing a halfcircle turn. Calculate the initial speed ofthe ions