American national biography volumes by cylindrical shells

Biographical encyclopedia

The American National Biography (ANB) is a 24-volume biographical encyclopedia set that contains about 17,400 entries and 20 million words, first published in 1999 by Oxford University Press under the auspices of the American Council of Learned Societies.

Formula for cylindrical shell method

Its volume V is calculated by subtracting the volume V1 of the inner cylinder from the volume of the outer cylinder V2.

Shell volume formula

U 2 represents the volume of the cylindrical shell, and this result can be easily compared with the volume of a sphere with edges of radii r U = r L = r (see.

Use the method of cylindrical shells to find the volume of the solid obtained by rotating the region bounded by the given curves about the x -axis.

Background

A 400-entry supplement appeared in 2002. Additional funding came from the Rockefeller Foundation, the Andrew W. Mellon Foundation and the National Endowment for the Humanities.

The ANB bills itself as the successor of the Dictionary of American Biography, which was first published between 1926 and 1937.

It is not, however, a strict superset of this older publication; the selection of topics was made anew.

It is commonly available in the reference sections of United States libraries, and is available online by subscription (see external links).

Awards and reception

In 1999, the American Library Association awarded the American National Biogra