Energy

Energy is a fundamental concept to mechanical engineering and physics. It is the capacity of a physical system to perform work. Forms of energy include heat, radiation, kinetic, electrical, chemical, nuclear, and gravitational. An important focus of mechanical engineering is the conversion of energy from one form to another (more useful) form. Energy comes from both renewable (solar, wind, hydrokinetic, geothermal and biomass) and non‐renewable sources (oil, natural gas, coal, and uranium).