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Marian Smoluchowski (Polish: [ˈmarjan smɔluˈxɔfski]; 28 May 1872 – 5 September 1917) was a Polish physicist who worked in the territories of the Austro-Hungarian Empire. He was a pioneer of statistical physics and made significant contributions to the theory of Brownian motion and stochastic processes .
Roy Patrick Kerr CNZM FRS FRSNZ (/ k ɜːr /; born 16 May 1934) is a New Zealand mathematician who discovered the Kerr geometry, an exact solution to the Einstein field equation of general relativity. His solution models the gravitational field outside an uncharged rotating massive object, including a rotating black hole.
Examples of important exact solutions include the Schwarzschild solution and the Friedman-Lemaître-Robertson–Walker solution. The EIH approximation plus other references (e.g. Geroch and Jang, 1975 - 'Motion of a body in general relativity', JMP, Vol. 16 Issue 1).
A notation like Δr 2 means (Δr) 2. The reason s 2 and not s is called the interval is that s 2 can be positive, zero or negative. Spacetime intervals may be classified into three distinct types, based on whether the temporal separation (c 2 Δt 2) or the spatial separation (Δr 2) of the two events is greater: time-like, light-like or space-like.
An instanton (or pseudoparticle [1] [2] [3]) is a notion appearing in theoretical and mathematical physics.An instanton is a classical solution to equations of motion with a finite, non-zero action, either in quantum mechanics or in quantum field theory.
In other words, a couple, unlike any more general moments, is a "free vector". (This fact is called Varignon's Second Moment Theorem.) [2] The proof of this claim is as follows: Suppose there are a set of force vectors F 1, F 2, etc. that form a couple, with position vectors (about some origin P), r 1, r 2, etc., respectively.
In fluid dynamics, Rayleigh problem also known as Stokes first problem is a problem of determining the flow created by a sudden movement of an infinitely long plate from rest, named after Lord Rayleigh and Sir George Stokes.
Schematic figure of a Brownian ratchet. In the philosophy of thermal and statistical physics, the Brownian ratchet or Feynman–Smoluchowski ratchet is an apparent perpetual motion machine of the second kind (converting thermal energy into mechanical work), first analysed in 1912 as a thought experiment by Polish physicist Marian Smoluchowski. [1]