When substances are heated, they gain heat energy. The atoms and molecules of substances gain kinetic energy and their speed increases. The average kinetic energy of these particles is ...

For example, when a bike applies its brakes and slows down the kinetic energy of the bike is transformed into heat energy in the brakes. How much energy is lost depends on the frictional force ...

"The Nature of Energy" (1949) explores various forms of energy and their applications in daily life and technology. It illustrates how energy, including muscular, electrical, chemical, heat, radiant, ...