Learn about the definition of energy, the forms that it comes in, and the difference between renewable and nonrenewable sources.
How do we compare different types of fuels? One practical way is to convert the physical units of the fuels into British thermal units or “Btu.” A Btu is a precise measure of the heat content of fuels.
Energy forms are either potential or kinetic. Potential energy comes in forms that are stored including — chemical, gravitational, mechanical, and nuclear. Kinetic energy forms are doing work — like electrical, heat, light, motion, and sound.