{'fraction_non_alphanumeric': 0.015410958904109588, 'fraction_numerical': 0.0, 'mean_word_length': 5.573033707865169, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Motion of a Pair of Oppositely Charged Spheres

This problem is not elementary if one includes relativistic effects, magnetism and radiation by the accelerating charges. The solution given in this section ignores such effects, and also ignores the gravitational interaction between the two masses (although Newtonian gravity could be included with little effect on the following other than increasing the complexity of the form of the potential energy). The total energy E of the system, approximated as nonrelativistic kinetic energy plus electrostatic potential energy, is constant,