Tag: Mechanical energy

The human body is only about 25% efficient at converting the chemical energy from food into useful work, with the rest being lost as heat. This transformation is a complex biological process that fundamentally changes food energy when it is used to do work, involving several stages of conversion from large molecules into the cellular fuel known as ATP.

According to the U.S. Energy Information Administration, the vast majority of electricity generation globally still relies on converting one of three primary energy sources into electrical output. This conversion process highlights the fundamental question: what are the three sources of energy output that drive our modern world?

Food provides the chemical energy that powers all life functions. As we chew and digest, the chemical bonds storing this energy are broken down, releasing energy to fuel every activity from thinking to running. But **how does energy change form when you eat food**? It's a fascinating series of biological conversions powered by our body's metabolic engine.