January 2025
Beginner
800 pages
24h 26m
English
Energy is commonly defined as the ability to do work or to produce heat. Normally heat could be derived by burning a fuel—i.e. a substance that contains internal energy which upon burning generates heat or through other means—such as by capturing the sun’s rays, or from the rocks below the earth’s surface. Similarly, the ability to do work may represent the capability (or potential) of doing work (known as potential energy as in stored water in a dam) or its manifestation in terms of conversion to motive power (known as kinetic energy as in the case of wind or tidal waves). Note that heat is an inevitable (desired or not desired) accompanying product of all energy conversions. ...
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