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The following is a list of notable unsolved problems grouped into broad areas of physics. [1] Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result.
The concept of force makes the everyday notion of pushing or pulling mathematically precise. Because the magnitude and direction of a force are both important, force is a vector quantity. The SI unit of force is the newton (N), and force is often represented by the symbol F. Force plays an important role in classical mechanics.
In physics, there are equations in every field to relate physical quantities to each other and perform calculations. Entire handbooks of equations can only summarize most of the full subject, else are highly specialized within a certain field. Physics is derived of formulae only.
This is a list of noteworthy publications in physics, organized by type. General audience ... List of important publications in physics. 2 languages ...
The actual solution was not found until Grigori Perelman published his papers. In late 2002 and 2003, Perelman posted three papers on arXiv . [ 29 ] [ 30 ] [ 31 ] In these papers, he sketched a proof of the Poincaré conjecture and a more general conjecture, Thurston's geometrization conjecture , completing the Ricci flow program outlined ...
Mathematics is a field of study that discovers and organizes methods, theories and theorems that are developed and proved for the needs of empirical sciences and mathematics itself.
The HQ-12, or KS-1, was the first Chinese air defense system equipped with a phased-array radar. The radar system was constantly improved with each new variant of the missile system. A typical HQ-12 battery includes one passive phased-array radar (PPAR) panel, four launchers fitted with two missiles per launcher, and 16 additional missiles on ...