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AQA Education, [1] trading as AQA (formerly the Assessment and Qualifications Alliance), is an awarding body in England, Wales and Northern Ireland. It compiles specifications and holds examinations in various subjects at GCSE, AS and A Level and offers vocational qualifications. AQA is a registered charity and independent of the government.
The O grade was equivalent to a GCE Ordinary Level pass which indicated a performance equivalent to the lowest pass grade at Ordinary Level.. Over time, the validity of this system was questioned because, rather than reflecting a standard, norm referencing simply maintained a specific proportion of candidates at each grade, which in small cohorts was subject to statistical fluctuations in ...
In addition to specifications for each chemical, Reagent Chemicals provides detailed methods for determining how to measure the properties and impurities listed in the specifications. Included are detailed explanations for numerous common analytical methods such as gas , liquid , ion , and headspace chromatography , atomic absorption ...
Extended Project Qualification (EPQ) is a qualification taken by some students in England and Wales, which is equivalent to 50% of an A-Level.Graded A*–E and worth up to 28 UCAS tariff points, [1] it is part of level three of the national qualifications framework.
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
By 1999, examination papers were dual-branded with both the AQA and NEAB names. In 2000, [ 1 ] NEAB and AEB/SEG (but not City & Guilds) formally merged under the name AQA. [ 1 ] As NEAB and AEB/SEG overlapped in the qualifications they offered, AQA retained two specifications for many subjects and do until this day, with schools able to choose ...
Steel classification according to EN 10027-2.Free searchable database "European steel and alloy grades" Comparison of various steel standards Archived 2019-04-27 at the Wayback Machine; Comparison of various tool steel standards; General guide to the EN 10027 steel name and numbering systems.
The Union of Soviet Socialist Republics [r] (USSR), [s] commonly known as the Soviet Union, [t] was a transcontinental country that spanned much of Eurasia from 1922 to 1991. . During its existence, it was the largest country by area, extending across eleven time zones and sharing borders with twelve countries, and the third-most populous co