CoachEnergy also hides in less visible costumes: thermal energy, the disordered agitation of a body’s molecules (the hotter, the more); chemical energy, stored in molecular bonds — food, wood, gasoline, batteries; electrical energy, carried by currents from plant to socket; radiative energy, carried by light even across empty space — how the Sun’s energy reaches us; nuclear energy, stored inside atomic nuclei, released in stars (Chapter 33).
示例
Example 9.13 (Where the gasoline goes)
A kilogram of gasoline stores of chemical energy; a car engine converts it with : of motion, heating the exhaust, the radiator and the street. Two thirds of every tank warms the atmosphere.