# Columbia Encyclopedia

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## Formulas for the Volumes of Some Common Solids (table)

(Encyclopedia)Formulas for the Volumes of Some Common Solids 1 Abbreviations: B = area of base; h = height; r = radius; l = length; w = width. ...

## volume

(Encyclopedia) CE5 volume, measure of solid content or capacity, usually expressed in units that are the cubes of linear units, such as cubic inches and cubic centimeters, or in units of dry and liquid measure, s...

## area

(Encyclopedia) CE5 area, measure of the size of a surface region, usually expressed in units that are the square of linear units, e.g., square feet or square meters. In elementary geometry, formulas for the areas...

## Formulas for Various Areas (table)

(Encyclopedia)Formulas for Various Areas 1 The abbreviations used are: b = base (length of any side of a plane figure); a = altitude (perpendicular distance from the farthest point of the figure to t...

## Wallis, John

(Encyclopedia)Wallis, John wŏlˈĭs [key], 1616–1703, English mathematician. He was Savilian professor of geometry at Oxford from 1649. He systematized the use of formulas, introduced the symbol ∞ for infinity...

(Encyclopedia)adsorption, adhesion of the molecules of liquids, gases, and dissolved substances to the surfaces of solids, as opposed to absorption, in which the molecules actually enter the absorbing medium (see a...

## Delambre, Jean Baptiste Joseph

(Encyclopedia)Delambre, Jean Baptiste Joseph zhäN bätēstˈ zhôzĕfˈ dəläNˈbrə [key], 1749–1822, French astronomer and mathematician. He was a member of the bureau of longitudes from 1795 and professor at...

## Berzelius, Jöns Jakob, Baron

(Encyclopedia)Berzelius, Jöns Jakob, Baron bərzēˈlēəs; Swed. yöns yäˈkôp bĕrsāˈlĭəs [key], 1779–1848, Swedish chemist, M.D. Univ. of Uppsala, 1802. He was noted for his work as teacher at the medic...

## index, in publishing

(Encyclopedia)index, of a book or periodical, a list, nearly always alphabetical, of the topics treated. This list is usually at the back of a book, and the table of contents is in the front. The index seeks to dir...

## formula, in chemistry

(Encyclopedia)formula, in chemistry, an expression showing the chemical composition of a compound. Formulas of compounds are used in writing the equations (see chemical equations) that represent chemical reactions....