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Modified Newtonian dynamics (MOND) is a theory that proposes a modification of Newton's second law to account for observed properties of galaxies.Its primary motivation is to explain galaxy rotation curves without invoking dark matter, and is one of the most well-known theories of this class.
List of textbooks in physics: Category:Physics textbooks; List of textbooks on classical mechanics and quantum mechanics; List of textbooks in electromagnetism;
The FBISE was established under the FBISE Act 1975. [2] It is an autonomous body of working under the Ministry of Federal Education and Professional Training. [3] The official website of FBISE was launched on June 7, 2001, and was inaugurated by Mrs. Zobaida Jalal, the Minister for Education [4] The first-ever online result of FBISE was announced on 18 August 2001. [5]
The first STEM was built in 1938 by Baron Manfred von Ardenne, [2] [3] working in Berlin for Siemens.However, at the time the results were inferior to those of transmission electron microscopy, and von Ardenne only spent two years working on the problem.
The Coulomb gauge (also known as the transverse gauge) is used in quantum chemistry and condensed matter physics and is defined by the gauge condition (more precisely, gauge fixing condition) (,) =. It is particularly useful for "semi-classical" calculations in quantum mechanics, in which the vector potential is quantized but the Coulomb ...
The first edition of the book to bear the title Fundamentals of Physics, first published in 1970, was revised from the original text by Farrell Edwards and John J. Merrill. [2] (Editions for sale outside the USA have the title Principles of Physics.) Walker has been the revising author since 1990. [3]
[2] [3] Aerial stem structures that undergo modifications to perform these special functions include tendrils, thorns, hooks, phylloclade, tuberous stems, and bulbils. [4] [5] [6] The auxiliary or the terminal part of the modified structures shows their stem nature. [7]
In physics, the observer effect is the disturbance of an observed system by the act of observation. [1] [2] This is often the result of utilising instruments that, by necessity, alter the state of what they measure in some manner. A common example is checking the pressure in an automobile tire, which causes some of the air to escape, thereby ...