A proton of charge +8 and mass m enters a uniform magnetic eld 9 B = Bi with an initial velocity '5' = vami + 0033- Find an expression in unit vector notation for its velocity 17 at any later time 75. Use notation: a = vow, b = 'on- NOTE: Express your answers in terms of the given variables. v= : units: Choose one v Particle 1, with mass 6.0 u and charge +39, and particle 2, with mass 5.0 u and charge +56, have the same kinetic energy and enter a region of uniform magnetic > > eld B , moving perpendicular to B . What is the ratio of the radius r1 of the particle 1 path to the radius r2 of the particle 2 path? Number l Units v