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Hace 4 días · The Planck constant, or Planck's constant, denoted by , [1] is a fundamental physical constant [1] of foundational importance in quantum mechanics: a photon 's energy is equal to its frequency multiplied by the Planck constant, and the wavelength of a matter wave equals the Planck constant divided by the associated particle momentum.
Hace 2 días · In electrolytes, electrical conduction happens not by band electrons or holes, but by full atomic species traveling, each carrying an electrical charge. The resistivity of ionic solutions (electrolytes) varies tremendously with concentration – while distilled water is almost an insulator, salt water is a reasonable electrical conductor.
Hace 2 días · Signature. Mohammad Abdus Salam [4] [5] [6] NI (M) SPk ( / sæˈlæm /; pronounced [əbd̪ʊs səlaːm]; 29 January 1926 – 21 November 1996) [7] was a Pakistani theoretical physicist. He shared the 1979 Nobel Prize in Physics with Sheldon Glashow and Steven Weinberg for his contribution to the electroweak unification theory. [8]
Hace 3 días · Substantial debate exists over the ethical, legal, and military aspects of the atomic bombings of Hiroshima and Nagasaki on 6 August and 9 August 1945 respectively at the close of World War II (1939–45). On 26 July 1945 at the Potsdam Conference, United States President Harry S. Truman, British Prime Minister Winston Churchill and President ...
Hace 3 días · Definition and basic properties. General relativity is a metric theory of gravitation. At its core are Einstein's equations, which describe the relation between the geometry of a four-dimensional pseudo-Riemannian manifold representing spacetime, and the energy–momentum contained in that spacetime. [46]
Hace 23 horas · Beatrice Worsley [4] Signature. Alan Mathison Turing OBE FRS ( / ˈtjʊərɪŋ /; 23 June 1912 – 7 June 1954) was an English mathematician, computer scientist, logician, cryptanalyst, philosopher and theoretical biologist. [5] Turing was highly influential in the development of theoretical computer science, providing a formalisation of the ...
Hace 2 días · In 1930, after the discovery of quantum mechanics, Fritz London showed that theory predicts the long-range attractive force should have =. In 1931, Lennard-Jones applied the this form of the potential to describe many properties of fluids setting the stage for many subsequent studies. Dimensionless (reduced units)
