{"knowledge_schema": {"broad_category": "Physics \u2192 Relativity \u2192 Energy of Particles", "refinement": "This problem involves calculating the total energy of a particle (electron) moving at a significant fraction of the speed of light, taking into account both its rest mass energy and its kinetic energy due to motion.", "specific_scope": "The focus is on an electron moving at 0.8 times the speed of light (0.8c) and using its rest mass energy of 0.511 MeV to find the total energy using relativistic formulas.", "goal": "Calculate the total energy of the electron, which includes both its rest mass energy and kinetic energy, to determine the correct energy value from the given options."}, "summary": "This problem is rooted in the principles of relativity, specifically focusing on the total energy of an electron moving at a relativistic speed (0.8c). To solve it, one must consider both the rest mass energy (0.511 MeV) and the additional kinetic energy due to its motion. The goal is to compute the total energy and select the correct answer from the provided options. The correct total energy of the electron is 0.85 MeV."}