| Flatness |
Articles about Flatness |
Information AboutFlatness |
| CATEGORIES ABOUT FLATNESS | |
| geometry | |
|
FLATNESS IN MATHEMATICS The flatness of a Surface is the degree to which it approximates a Mathematical Plane . The term is generalized for higher-dimensional Manifold s to describe the degree to which they approximate the Euclidean Space of the same dimensionality. See Curvature . Flatness in Homological Algebra and Algebraic Geometry means, of an object in an Abelian Category , that is an Exact Functor . See Flat Module or, for more generality, Flat Morphism . FLATNESS IN COSMOLOGY In Cosmology , the concept of "curvature of space" is considered. A space without curvature is called a "flat space" or Euclidean Space . A question often asked is "is the Universe flat"? According to Albert Einstein's Theory Of Relativity , it probably is curved and warped due to Gravity . See also External link
FLATNESS IN MECHANICAL ENGINEERING Joseph Whitworth popularized the first practical method of making accurate flat surfaces during the 1830s, using Engineer's Blue and scraping techniques on three trial surfaces. By testing all three pairs against each other, it is ensured that the surfaces become flat. Using two surfaces would result in a concave surface and a convex surface. Eventually a point is reached when many points of contact are visible within each square inch, at which time the three surfaces are uniformly flat to a very close tolerance. {Link without Title} Up until his introduction of the scraping technique, the same three plate method was employed using polishing techniques, giving less accurate results. This led to an explosion of development of precision Instrument s using these flat surface generation techniques as a basis for further construction of precise shapes. References
External link FLATNESS IN LIQUIDS A Carbonated beverage becomes flat when it loses enough of its Carbon Dioxide that there is no more "fizz" left, although this refers to the intrinsic properties of the substance, rather than the geometric properties of the liquid. On planet earth, the flatness of a liquid is a function of the curvature of the earth, and from trigonometry, can be found to deviate from true flatness by approximately 19.6 Nanometers over an area of 1 square meter. This is using the Earths Mean Radius at sea level, however a liquid will be slightly flatter at the poles.. See also |
|
|