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The need for the hydraulic diameter arises due to the use of a single dimension in the case of a dimensionless quantity such as the Reynolds number, which prefers a single variable for flow analysis rather than the set of variables as listed in the table below. The Manning formula contains a quantity called the hydraulic radius.
Rectangle (+) is length, is ... is the diameter ... This is a list of volume formulas of basic shapes: [4]: 405–406 ...
The formula for the perimeter of a rectangle The area of a rectangle is the product of the length and width. ... A saddle rectangle has 4 nonplanar vertices, ...
formula variables circle = ... is the diameter. semicircle (+) ... For example, the perimeter of a rectangle of width 0.001 and length 1000 is slightly above 2000 ...
Inscribed circle diameter ... As a corollary of the annulus chord formula, ... with the base, b of a rectangle with the same area.
A filled rectangular area as above but with respect to an axis collinear with the base = = [4] This is a result from the parallel axis theorem: A hollow rectangle with an inner rectangle whose width is b 1 and whose height is h 1
The solid angle of a latitude-longitude rectangle on a ... By using the definition of angular diameter, the formula for the solid angle of a celestial object can ...
In this context, a diameter is any chord which passes through the conic's centre. A diameter of an ellipse is any line passing through the centre of the ellipse. [7] Half of any such diameter may be called a semidiameter, although this term is most often a synonym for the radius of a circle or sphere. [8] The longest diameter is called the ...