Energy

Energy is the capacity or ability of a system to perform work or produce change. It exists in various forms, including kinetic (the energy of motion), potential (stored energy based on position), thermal (related to temperature and heat), chemical (stored in chemical bonds), electrical (associated with electric charges), nuclear (released during nuclear reactions), and more. Energy can be transformed from one form to another but cannot be created or destroyed, according to the law of conservation of energy. It plays a crucial role in physical processes, biological systems, and human activities, powering everything from machines and vehicles to living organisms and ecosystems. The measurement of energy is typically expressed in joules, calories, or kilowatt-hours, depending on the context.