Estimate the temperature needed to achieve the fusion of deuterium to make an \(\alpha\) particle. The energy required can be estimated from Coulomb's law [use the form \(E=\) \(9.0 \times 10^{9}\left(Q_{1} Q_{2} / right)\), using \(Q=1.6 \times 10^{-19} \mathrm{C}\) for a proton and \(r=2 \times 10^{-15} \mathrm{~m}\) for the helium nucleus; the unit for the proportionality constant in Coloumb's law is \(\mathrm{J} \cdot \mathrm{m} / \mathrm{C}^{2}\) ].