An alpha particle (α), which is the same as a helium-4 nucleus, is momentarily at rest in a region of space occupied by an electric field. the particle then begins to move. find the speed of the alpha particle after it has moved through a potential difference of −3.45×10−3 v .the charge and the mass of an alpha particle are qα = 3.20×10−19 c and mα = 6.68×10−27 kg , respectively.

mechanical energy is conserved in the presence of which of the following types of forces? (select all that apply.)

(a) electrostatic
(b) frictional
(c) magnetic
(d) gravitational