Physics
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
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Religious Studies, Education, Psychology, History, Literature, Philosophy, Entire Library
...is ultrasonics , the study of sound waves of very...hearing. Optics, the study of light, is concerned...and nuclear physics studies matter on the smallest...the period of Greek civilization, dating from Thales...contributions from the Chinese (papermaking, gunpowder...the preservation and study of Greek science by...