Dr. Steve Rapp, 2005
Thermodynamics is relevant in the study of how
energy is used in our economy.
Sources of energy include biomass, fossil fuels,
hydroelectric, solar, wind, ocean currents,
geothermal, nuclear, and fuel cells.
We must remember energy is not used up (the
energy of the universe is constant) but it is used.
It is most useful when it does work.