plane of symmetry
81Bicycle and motorcycle dynamics — A computer generated, simplified model of bike and rider demonstrating an uncontrolled right turn. An …
82twinning — /twin ing/, n. 1. the bearing of two children at one birth. 2. the coupling of two persons or things; union. 3. Crystall. the union of crystals to form a twin. [1565 75; TWIN1 + ING1] * * * ▪ crystallography in crystallography, regular… …
83Introduction to systolic geometry — Systolic geometry is a branch of differential geometry, a field within mathematics, studying problems such as the relationship between the area inside a closed curve C , and the length or perimeter of C . Since the area A may be small while the… …
84Flight dynamics — is the science of air and space vehicle orientation and control in three dimensions. The three critical flight dynamics parameters are the angles of rotation in three dimensions about the vehicle s center of mass, known as pitch , roll and yaw… …
85Hexagonal bipyramid — Type bipyramid Faces 12 triangles Edges 18 Vertices 8 Face configu …
86liquid crystal — a liquid having certain crystalline characteristics, esp. different optical properties in different directions when exposed to an electric field. [1890 95] * * * Substance that flows like a liquid but maintains some of the ordered structure… …
87High-temperature superconductivity — Unsolved problems in physics What causes superconductivity at temperatures above 50 kelvin? High temperature superconductors (abbreviated high Tc or HTS) are materials that have a superconducting transition temperature (Tc) above 30 K… …
88Enantiomer — This article is about the concept in chemistry. For a discussion of enantiomers in mathematics, see Chirality (mathematics). (S) (+) lactic acid (left) and (R) (–) lactic acid (right) are nonsuperposable mirror images of each other In chemistry,… …
89isomerism — /uy som euh riz euhm/, n. 1. Chem. the relation of two or more compounds, radicals, or ions that are composed of the same kinds and numbers of atoms but differ from each other in structural arrangement (structural isomerism), as CH3OCH3 and… …
90Stilbite — from Kiui Island, Alaska, USA General Category Zeolite Chemical formul …
