A uranium-238 atom can break up into a thorium-234 atom and a particle called an alpha particle, \(\alpha-4\). The numbers indicate the inertias of the atoms and the alpha particle in atomicmass units ( \(1 \mathrm{amu}=1.66 \times 10^{-27} \mathrm{~kg}\) ). When a uranium atom initially at rest breaks up, the thorium atom is observed to recoil with an \(x\) component of velocity of \(-2.5 \times 10^{5} \mathrm{~m} / \mathrm{s}\). How much of the uranium atom's internal energy is released in the brcakup?