In the region of the figure, we have a uniform magnetic field \( \vec{B} \). Five particles are thrown into this field at point O, all with initial velocity v₀. The particles are a proton, a neutral sodium atom, an electron, a deuteron, and a negative fluorine ion. Characterize the trajectories described by the particles. Data: the deuteron is a particle made up of a proton and a neutron; the mass of the fluorine ion is greater than that of the electron and has the same charge.

The horizontal wire in the figure has a mass of 50 g, a length of 2.0 m, and rises with an unknown acceleration. We know that in the region there is a horizontal magnetic field of 4×10⁻¹ tesla, perpendicular to the wire and that the wires are traversed by a current of 1.5 amperes.
a) Determine the direction of the field;
b) Calculate the magnetic force;
c) Calculate the acceleration.