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Find number abc

If 71b20 - caaac = 11b2c find number abc. Multiple solutions may exist.

Correct answers: 2

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Horace Bénédict de Saussure

Died 22 Jan 1799 at age 58 (born 17 Feb 1740). Swiss physicist, geologist, and early Alpine explorer. He made an extensive study of the structure of the Alps, described in the four volumes of Voyages dans les Alpes (1779-96). His theory was neptunian, but with uniformitarian overtones. The word geology was introduced into scientific nomenclature by Saussure with the publication of the first volume. Saussure developed what was probably the first electrometer (1766), used to measure electric potential. He also developed an improved hygrometer to measure atmospheric humidity (1783), the first to use human hair for the purpose.

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