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2. Ankanam - Wikipedia

   en.wikipedia.org/wiki/Ankanam

   An Ankanam is measured as 72 sq ft (6.7 m 2), (mostly in the Nellore District) and, in some places (such as Tirupati), 36 sq ft (3.3 m 2). In Nellore, one acre equals 605 Ankanams, and 1 cent amounts to 6.05 Ankanams. This unit is very popular, presumably because it is easier to calculate the cost of a piece of land. [1]

3. Roof pitch - Wikipedia

   en.wikipedia.org/wiki/Roof_pitch

   Historically, roof pitch was designated in two other ways: A ratio of the ridge height to the width of the building (span) [6] and as a ratio of the rafter length to the width of the building. [7] Commonly used roof pitches were given names such as: Greek: the ridge height is 1 ⁄ 9 to 1 ⁄ 7 the span (an angle of 12.5° to 16°);

4. Reflective surfaces (climate engineering) - Wikipedia

   en.wikipedia.org/wiki/Reflective_surfaces...

   As part of the new efforts, DOE will install a cool roof, whenever cost-effective over the lifetime of the roof, during construction of a new roof or the replacement of an old one at a DOE facility. In October 2013, the United States Department of Energy ranked Cool Roofs as a 53 out of 100 (0 to 100 weighted average) for a cost-effective ...

5. Module:Convert/documentation/conversion data - Wikipedia

   en.wikipedia.org/wiki/Module:Convert/...

   For example, the NIST document has 1 square mile = 2.589 988 E+06 square meters. The convert template has 1 square mile = 2,589,988.110336 square meters. Values for the fundamental physical constants come from the NIST Reference on Constants, Units, and Uncertainty , either the 2010 or the 2014 version.

6. Floor area ratio - Wikipedia

   en.wikipedia.org/wiki/Floor_area_ratio

   For example, if a lot must adhere to a 0.1 FAR, then the total area of all floors in all buildings on the lot must be no more than one-tenth the area of the parcel itself. In other words, if the lot was 10,000 sq. ft, then the total floor area of all floors in all buildings must not exceed 1,000 sq. ft.

7. List of unusual units of measurement - Wikipedia

   en.wikipedia.org/wiki/List_of_unusual_units_of...

   In radio astronomy, the unit of electromagnetic flux is the jansky (symbol Jy), equivalent to 10 −26 watts per square metre per hertz (= 10 −26 kg/s 2 in base units, about 8.8×10 −31 BTU/ft 2). It is named after the pioneering radio astronomer Karl Jansky. The brightest natural radio sources have flux densities of the order of one to one ...