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The Planck relation [1] [2] [3] (referred to as Planck's energy–frequency relation, [4] the Planck–Einstein relation, [5] Planck equation, [6] and Planck formula, [7] though the latter might also refer to Planck's law [8] [9]) is a fundamental equation in quantum mechanics which states that the energy E of a photon, known as photon energy, is proportional to its frequency ν: =.
The following is a list of schools that participate in NCAA Division I softball, according to NCAA.com. [1] These teams compete to go to Oklahoma City, Oklahoma, and Devon Park for the Women's College World Series. (For schools whose athletic branding does not directly correspond with the school name, the athletic branding is in parentheses.)
The AN/PRC-160 began production in 2017 as the HF manpack component to the Harris Falcon III ecosystem of tactical radios. [3] Several DoD contracts have since been signed by branches of the US military, including a nearly $8 million US Air Force contract for 264 radios. [4]
Czech orthography is a system of rules for proper formal writing ( orthography) in Czech. The earliest form of separate Latin script specifically designed to suit Czech was devised by Czech theologian and church reformist Jan Hus, the namesake of the Hussite movement, in one of his seminal works, De orthographia bohemica ( On Bohemian ...
The catalogue of Helm is now the preferred one for the works of C. P. E. Bach. This listing also substantially conforms to the works given by Grove Music Online. [3] The new complete edition of Carl Philipp Emanuel Bach's works [4] surpasses any other earlier organizational efforts in dating and cataloguing the enormous output of C. P. E. Bach.
In mathematics, the Schwarz lemma, named after Hermann Amandus Schwarz, is a result in complex analysis about holomorphic functions from the open unit disk to itself. The lemma is less celebrated than deeper theorems, such as the Riemann mapping theorem, which it helps to prove. It is, however, one of the simplest results capturing the rigidity ...
The Czechoslovak crown was introduced in April 1919. Introduced at a 1:1 ratio to the Austro-Hungarian currency, it became one of the most stable currencies in Europe. The First Republic became one of the 10 most developed countries of the world (behind the U.S., Canada, Australia, Switzerland, Argentina, Britain, France, Sweden and Belgium). [42]
The European Union membership referendum in 2003 approved the country's accession with 77.3% in favour, and in 2004 the Czech Republic joined the EU. [6]Since joining the EU in May 2004, the Czech Republic has adopted fiscal and monetary policies that aim to align its macroeconomic conditions with the rest of the European Union.