This site has links to tables of mathematical formulas. To view them, the student must download the formulas in pdf format.

Dozens of statistical terms are defined and illustrated in this glossary.

The Zande, whose homelands lie within three modern African states (Republic of the Sudan, Zaire, Central African Republic), constitute a large and complex amalgam of originally distinct ethnic groups, united by culture and, to a...

The necessity of gravitation to a circular orbit is discussed and equations for the orbital speed are derived from the law of universal gravitation. Binary systems in which two objects orbit about a center of mass are explained and...