Two alpha particles (helium nuclei), each consisting of two protons and two neu- trons, have an electrical potential energy of 6.12×10-19 J.
What is the distance between these particles at this time? The Coulomb constant is 8.98755 × 109 N · m2/C2, the elemental charge is 1.6021 × 10-19 C, and the accel- eration due to gravity is 9.8 m/s2.