The nucleus of $8Be,$ which consists of $4$ protons and $4$ neutrons, is very unstable and spontaneously breaks into two alpha particles $($helium nuclei, each consisting of $2$ protons and $2$ neutrons$).$

$($a$)$ What is the force between the fivo alpha particles when they are $5\mathrm{.}46{10}^{-15}m$ apart?

$N$

$($b$)$ What is the initial magnitude of the acceleration of the alpha particles due to this force? Note that the mass of an alpha particle is $4\mathrm{.}0026u.$

$\frac{m}{s^2}$