print email comment close A View from the Back of the Envelope URL: http://www.vendian.org/envelope/ Description: "These pages are about approximation, and some of the fun it enables." Examples, exercises, and links to help you grasp concepts of magnitude and scale, such as large and small numbers, the size of the world, and expressions of length, area, volume, and speed. There are sections on simplifying numbers, exponential notation, Fermi problems, using your body as a ruler, and other ways to help visualize size and scale. Author: Charity, Mitchell N. Library of Congress Subject Headings: Approximation theory Cosmology Dimensions Mensuration Size judgment LII Database Information: Record 8864 created by Martha Gifford on 05/19/2002 Last modification on 05/23/2002 Published: 05/19/2002   Funding agency: California State Library LII Item ID: http://lii.org/cs/lii/view/item/8864