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Parrs Wood is an area of East Didsbury, in south Manchester, England. It was formerly the estate surrounding Parrs Wood House, an 18th-century Georgian villa. [1] Today the area incorporates part of Wilmslow Road and is home to Parrs Wood High School and Sixth Form Centre, a Tesco supermarket, and Parrs Wood Entertainment Centre.
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.
Basal area is the cross-sectional area of trees at breast height (1.3m or 4.5 ft above ground). It is a common way to describe stand density. In forest management, basal area usually refers to merchantable timber and is given on a per hectare or per acre basis. If one cut down all the merchantable trees on an acre at 4.5 feet (1.4 m) off the ...
A cord of wood. The cord is a unit of measure of dry volume used to measure firewood and pulpwood in the United States and Canada.. A cord is the amount of wood that, when "racked and well stowed" (arranged so pieces are aligned, parallel, touching, and compact), occupies a volume of 128 cubic feet (3.62 m 3). [1]
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 .
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Wood to be used for construction work is commonly known as lumber in North America. Elsewhere, lumber usually refers to felled trees, and the word for sawn planks ready for use is timber. [46] In Medieval Europe oak was the wood of choice for all wood construction, including beams, walls, doors, and floors.
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 ...