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There is no clear relationship between the size of soil mineral components and their mineralogical nature: sand and silt particles can be calcareous as well as siliceous, [18] while textural clay (0.002 mm (7.9 × 10 −5 in)) can be made of very fine quartz particles as well as of multi-layered secondary minerals. [19]
Yojana – a Vedic measure of distance used in ancient India. Its value was about 10 km (6.2 mi), although the exact value is disputed among scholars (between 8 and 13 km or 5 and 8 mi) Its value was about 10 km (6.2 mi), although the exact value is disputed among scholars (between 8 and 13 km or 5 and 8 mi)
Typical bulk density of sandy soil is between 1.5 and 1.7 g/cm 3. This calculates to a porosity between 0.43 and 0.36. Typical bulk density of clay soil is between 1.1 and 1.3 g/cm 3. This calculates to a porosity between 0.58 and 0.51. This seems counterintuitive because clay soils are termed heavy, implying lower porosity.
The Babylonian Map of the World (also Imago Mundi or Mappa mundi) is a Babylonian clay tablet with a schematic world map and two inscriptions written in the Akkadian language. Dated to no earlier than the 9th century BC (with a late 8th or 7th century BC date being more likely), it includes a brief and partially lost textual description.
In contrast the volume of the Sag Branch Tuliptree (Liriodendron tulipifera), height 167.7 feet, dbh 7.08 feet, crown spread 101 feet) had a trunk volume of 2430 ft 3 (68.6 m 3) and a branch volume of 1560 ft 3 (44.17 m 3). [15] The volume of the branches on the tuliptree was only 64.2% that of the trunk. [15] The President Tree (Sequoiadendron ...
The amount of certain clay minerals that are present, such as montmorillonite and smectite, directly affects the shrink-swell capacity of soil. [2] This ability to drastically change volume can cause damage to existing structures, such as cracks in foundations or the walls of swimming pools. [3]
In soil mechanics, dilatancy or shear dilatancy [1] is the volume change observed in granular materials when they are subjected to shear deformations. [ 2 ] [ 3 ] This effect was first described scientifically by Osborne Reynolds in 1885/1886 [ 4 ] [ 5 ] and is also known as Reynolds dilatancy .
Daniel Charl Stephanus Oosthuizen (also known as Daantjie Oosthuizen; 15 January 1926 – 4 April 1969) was a South African philosopher, and an early Afrikaner voice against Apartheid. The main direction of his philosophical work lay in the field of epistemology and the philosophy of mind.