What does Leana mean? Leana [leana] as a girls' name has its roots in Norman, Greek, English and French, and Leana means sun ray; to twine around. Leana is a variant form of Aileen (Norman): Scottish respelling of Eileen. Leana is also an Irish form of Helen (Greek).
From Wikipedia, the free encyclopedia. Formal balance, also called symmetrical balance, is a concept of aesthetic composition involving equal weight and importance on both sides of a composition. ^ J. Englebright Fox, Robert Schirrmacher. Art and Creative Development for Young Children (7 ed.). Cengage Learning, 2011.
A mass balance, also called a material balance, is an application of conservation of mass to the analysis of physical systems.By accounting for material entering and leaving a system, mass flows can be identified which might have been unknown, or difficult to measure without this technique.hen a mass balance is made for a tube, one first considers an infinitesimal part of the tube and make a mass balance over that using the ideal tank reactor model. That mass balance is then integrated over the entire reactor volume to obtain: