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Cool Math Games (branded as Coolmath Games) [a] is an online web portal that hosts HTML and Flash web browser games targeted at children and young adults. Cool Math Games is operated by Coolmath LLC and first went online in 1997 with the slogan: "Where logic & thinking meets fun & games.".
Equate is a board game made by Conceptual Math Media where players score points by forming equations on a 19x19 game board. Equations appear across and down in a crossword fashion and must be mathematically correct. Because of its characteristics, the game is often described as a Scrabble with math. [1] [2]
Poptropica is an online adventure game game, developed in 2007 by Pearson Education's Family Education Network, and targeted towards children aged 6 to 15. Poptropica is primarily the creation of Jeff Kinney , later known as the author of the Diary of a Wimpy Kid series.
All celestial objects – planets, stars , galaxies, black holes – spin. [1] [2] [3] The boundaries of a Kerr black hole relevant to astrophysics. Note that there are no physical "surfaces" as such. The boundaries are mathematical surfaces, or sets of points in spacetime, relevant to analysis of the black hole's properties and interactions.
These functions are used in analytical solutions to Dirac equation in a radial potential. [3] The spinor spherical harmonics are sometimes called Pauli central field spinors , in honor to Wolfgang Pauli who employed them in the solution of the hydrogen atom with spin–orbit interaction .
Topspin in ball games is defined as spin about a horizontal axis perpendicular to the direction of travel that moves the top surface of the ball in the direction of travel. Under the Magnus effect, topspin produces a downward swerve of a moving ball, greater than would be produced by gravity alone.
The idea behind parity symmetry was that the equations of particle physics are invariant under mirror inversion. This led to the prediction that the mirror image of a reaction (such as a chemical reaction or radioactive decay ) occurs at the same rate as the original reaction.
In Einstein–Cartan theory, the torsion is now a variable in the principle of stationary action that is coupled to a curved spacetime formulation of spin (the spin tensor). These extra equations express the torsion linearly in terms of the spin tensor associated with the matter source, which entails that the torsion generally be non-zero ...