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For example, a 15-inch (38 cm) display whose dimensions work out to 12 inches (30.48 cm) wide by 9 inches (22.86 cm) high, capable of a maximum 1024×768 (or XGA) pixel resolution, can display around 85 PPI, or 33.46 PPCM, in both the horizontal and vertical directions. This figure is determined by dividing the width (or height) of the display ...
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A two-dimensional space is a mathematical space with two dimensions, meaning points have two degrees of freedom: their locations can be locally described with two coordinates or they can move in two independent directions. Common two-dimensional spaces are often called planes, or, more generally, surfaces. These include analogs to physical ...
Reference dimensions are provided for a variety of reasons and are often an accumulation of other dimensions that are defined elsewhere [2] (e.g. on the drawing or other related documentation). These dimensions may also be used for convenience to identify a single dimension that is specified elsewhere (e.g. on a different drawing sheet).
In two- and three-dimensions, these correspond to the lengths and angles between the edges of the unit cell. [ 1 ] The fractional coordinates of a point in space ρ = ( ρ x 1 , ρ x 2 , … , ρ x d ) {\displaystyle \rho =(\rho _{x_{1}},\rho _{x_{2}},\dots ,\rho _{x_{d}})} in terms of the lattice basis vectors is defined as,
A scale model is a representation or copy of an object that is larger or smaller than the actual size of the object being represented. Very often the scale model is smaller than the original and used as a guide to making the object in full size. —
The dimensions that can be formed from a given collection of basic physical dimensions, such as T, L, and M, form an abelian group: The identity is written as 1; [citation needed] L 0 = 1, and the inverse of L is 1/L or L −1. L raised to any integer power p is a member of the group, having an inverse of L −p or 1/L p.
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