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Phase

A short course on the concept that does the heavy lifting in classifying materials. Merrill opens by taking the everyday meaning of the word away from you, because a phase is a uniform region and has nothing to do with solids, liquids or gases.

13 sections
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The sections below are arranged in the order we suggest, and the highlighted one is where we recommend you begin. But learning is not linear. Open any section in any order, return to earlier ones whenever you like, and treat the sequence as a recommendation rather than a track.