Maria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero? a) 0 hours b) it was never zero. c) at 0 hours and 2 hours d) from .75 to 1.25 hours

3. a particle with initial velocity v⃗ 0=(5.85×103m/s)j^ enters a region of uniform electric and magnetic fields. the magnetic field in the region is b⃗ =−(1.35t)k^. you can ignore the weight of the particle. a. calculate the magnitude of the electric field in the region if the particle is to pass through undeflected, for a particle of charge +0.640 nc.