How Do We Get Our Energy Right Now?
It is worthwhile, at this point, to restate what energy is, a question that we discussed in Chapter 1. We have already seen that, formally, energy is a force pushing through a distance, whereby we say “work is done.” We can feel the essence of motion (or kinetic energy) in the concept of the movement of a body, and in the push necessary to make it attain its velocity. We have also seen that bodies can have potential energy as a result of their position (e.g., a weight raised to a height above the floor), and that substances can have energy stored in the chemical bonds of the molecules which comprise them, energy which may be released as heat when the bond is broken.
KeywordsFossil Fuel Steam Pressure Heat Engine Hydroelectric Plant Exhaust Pipe
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