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A group of particles is traveling in a magnetic field of unknown magnitude and direction. You observe that a proton moving at 1.50 km/s in the +x-direction experiences a force of 2.25 × 10−16 N in the +y-direction, and an electron moving at 4.75 km/s in the −z-direction experiences a force of 8.50 × 10−16 N in the +y-direction. (a) What are the magnitude and direction of the magnetic field? (b) What are the magnitude and direction of the magnetic force on an electron moving in the −y-direction at 3.20 km/s?
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