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The precise origins of the dimensions of US letter-size paper (8.5 × 11 in) are not known. The American Forest & Paper Association says that the standard US dimensions have their origin in the days of manual papermaking, the 11-inch length of the standard paper being about a quarter of "the average maximum stretch of an experienced vatman's arms". [2]
Services accounted for 58.2% of Sri Lanka's economy in 2019 up from 54.6% in 2010, industry 27.4% up from 26.4% a decade earlier and agriculture 7.4%. [41] Though there is a competitive export agricultural sector, technological advances have been slow to enter the protected domestic sector. [42]
Sri Lanka-China relations started as soon as the People's Republic of China was formed in 1949. The two countries signed an important Rubber-Rice Pact in 1952. [247] Sri Lanka played a vital role at the Asian–African Conference in 1955, which was an important step in the crystallisation of the NAM. [248]
Sri Lanka's population is aging faster than any other nation in South Asia and has the fifth highest rapidly growing population of older people in Asia after China, Thailand, South Korea and Japan. [16] [17] [18] In 2015, Sri Lanka's population aged over 60 was 13.9%, by 2030 this will increase to 21% and by 2050 this number will reach 27.4%.
The vatadage is considered to be one of ancient Sri Lanka's most prolific architectural creations; this design represented a changing perspective of stupa design independently within the island. [6] Early provincial vatadages have been in the form of a square [ 6 ] later it developed into a circular form enclosing the dagoba. [ 2 ]
India last toured Sri Lanka in 2021. [6] In July 2024, Sri Lanka Cricket confirmed the fixtures for the tour. [7] This was Gautam Gambhir's first assignment as head coach and Suryakumar Yadav's first series as full-time T20I captain of India. [8] [9] India won the T20I series whitewashing Sri Lanka by 3-0. However, Sri Lanka won the ODI series ...
The principal sources of rare-earth elements are the minerals bastnäsite (RCO 3 F, where R is a mixture of rare-earth elements), monazite (XPO 4, where X is a mixture of rare-earth elements and sometimes thorium), and loparite ((Ce,Na,Ca)(Ti,Nb)O 3), and the lateritic ion-adsorption clays.
Here [Ne] refers to the core electrons which are the same as for the element neon (Ne), the last noble gas before phosphorus in the periodic table. The valence electrons (here 3s 2 3p 3) are written explicitly for all atoms. Electron configurations of elements beyond hassium (element 108) have never been measured; predictions are used below.