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The stere is typically used for measuring large quantities of firewood or other cut wood, [1] while the cubic meter is used for uncut wood. [2] The name was coined from the Greek στερεός stereós, "solid", in 1795 in France as a metric analogue to the cord. The unit was introduced to remove regional disparities of this former unit, for ...
The Parr Company Inc. is a lumber and building supplies dealer based in Oregon. [1] The Hillsboro, Oregon , based company has 44 locations in Oregon and Washington and is the 18th largest residential building supplies dealer in the United States .
This page was last edited on 1 February 2024, at 08:22 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Hankinson's equation (also called Hankinson's formula or Hankinson's criterion) [1] is a mathematical relationship for predicting the off-axis uniaxial compressive strength of wood. The formula can also be used to compute the fiber stress or the stress wave velocity at the elastic limit as a function of grain angle in wood .
The English surveyor Edward Hoppus introduced the unit in his 1736 manual of practical calculations. [ 2 ] [ 3 ] The tables include reference to stone as well as timber, as stone can similarly suffer wastage during processing into regular pieces.
The formula for the surface area of a sphere is more difficult to derive: because a sphere has nonzero Gaussian curvature, it cannot be flattened out. The formula for the surface area of a sphere was first obtained by Archimedes in his work On the Sphere and Cylinder. The formula is: [6] A = 4πr 2 (sphere), where r is the radius of the sphere.
This is an accepted version of this page This is the latest accepted revision, reviewed on 25 December 2024. Measure of a two-dimensional surface A sphere of radius r has surface area 4 πr 2. The surface area (symbol A) of a solid object is a measure of the total area that the surface of the object occupies. The mathematical definition of surface area in the presence of curved surfaces is ...
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