The pengő (Hungarian pronunciation: [ˈpɛnɡøː], sometimes written as pengo or pengoe in English) was the currency of Hungary between 1 January 1927, when it replaced the korona, and 31 July 1946, when it was replaced by the forint. The pengő was subdivided into 100 fillér. Although the introduction of the pengő was part of a post-World War I stabilisation program, the currency survived for only 20 years and experienced the most serious hyperinflation ever recorded. == Name == The Hungarian participle pengő means 'ringing' (which in turn derives from the verb peng, an onomatopoeic word equivalent...

Half-life (abbreviated t1⁄2) is the time required for a quantity to reduce to half its initial value. The term is commonly used in nuclear physics to describe how quickly unstable atoms undergo, or how long stable atoms survive, radioactive decay. The term is also used more generally to characterize any type of exponential or non-exponential decay. For example, the medical sciences refer to the biological half-life of drugs and other chemicals in the body. The converse of half-life is doubling time. The original term, half-life period, dating to Ernest Rutherford's discovery of the principle in...

E = mc2 is the equation of mass–energy equivalence. E=MC2 or E=MC2 may also refer to: E=MC2 (animated cartoon), a 2009 animated cartoon series created by Sprocket Studios E=MC² (Mariah Carey album), a 2008 album by Mariah Carey "E=MC2", a song by Ayreon on the 2008 album 01011001 E=mc2: A Biography of the World's Most Famous Equation, a 2001 book by David Bodanis "E=MC2" (song), a 1986 song by Big Audio Dynamite E=MC² (Giorgio Moroder album), a 1979 album by Giorgio Moroder E=MC2 (poem), a 1961 poem by Rosser Reeves E=MC2, also known as The Atomic Mr. Basie, a 1958 album by Count Basie E=MC2, a...