- published: 24 Nov 2009
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Cold refers to the condition or subjective perception of having low temperature. A cold body is often described as the opposite of hot, or as having less heat, although the latter use of "heat" would be incorrect in the context of physics, as heat refers to the transfer of energy between bodies, which do not "have" heat themselves.
A lower bound to temperature is the absolute zero, defined as 0 K on the Kelvin scale, an absolute thermodynamic temperature scale. This corresponds to −273.15 °C on the Celsius scale, −459.67 °F on the Fahrenheit scale, and 0 °R on the Rankine scale.
Since temperature relates to the thermal energy held by an object or a sample of matter, which is the kinetic energy of the random motion of the particle constituents of matter, an object will have less thermal energy when it is colder and more when it is hotter. If it were possible to cool a system to absolute zero, all motion of the particles in a sample of matter would cease and they would be at complete rest in this classical sense. The object would be described as having zero thermal energy. Microscopically in the description of quantum mechanics, however, matter still has zero-point energy even at absolute zero, because of the uncertainty principle.
Demetria Devonne "Demi" Lovato (born August 20, 1992) is an American singer-songwriter, musician, and actress. Her earliest roles included Angela on Barney & Friends, before she became better known for her starring roles in the Camp Rock movies, as Sonny Munroe in the Disney sitcom Sonny with a Chance, and as the star of the 2009 movie Princess Protection Program. She is also involved in philanthropic activities through charity work and various social and environmental causes.
As a solo musical artist, Lovato released her debut album Don't Forget on September 23, 2008. The album debuted at number two on the Billboard 200 selling 89,000 copies in the first week. It has since shipped over 500,000 copies, earning a gold certification in the United States. Lovato released her second album, Here We Go Again, on July 21, 2009. The album debuted at number one on the Billboard 200, selling 108,000 copies in the first week. Her third studio album, Unbroken, was released on September 20, 2011 and peaked at number four on the Billboard 200. She is working on her fourth studio album.
Beef Stroganoff or Beef Stroganov (in Russian: Бефстроганов Befstróganov) is a Russian dish of sautéed pieces of beef served in a sauce with smetana or sour cream. From its origins in 19th-century Russia, it has become popular around the world, with considerable variation from the original recipe.
Various explanations are given for the name, presumably derived from some member of the large and important Stroganov family, perhaps Alexander Grigorievich Stroganoff of Odessa or a diplomat, Count Pavel Stroganov.
Elena Molokhovets' classic Russian cookbook (1861) gives the first known recipe for Govjadina po-strogonovski, s gorchitseju "Beef à la Stroganov, with mustard" which involves lightly floured beef cubes (not strips) sautéed, sauced with prepared mustard and bouillon, and finished with a small amount of sour cream: no onions, no mushrooms. An 1890 competition is sometimes mentioned in the dish's history, but both the recipe and the name existed before then. A 1912 recipe adds onions and tomato paste, and serves it with crisp potato straws, which are considered the traditional side dish in Russia. The version given in the 1938 Larousse Gastronomique includes beef strips, and onions, with either mustard or tomato paste optional.