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  2. n-body problem - Wikipedia

    en.wikipedia.org/wiki/N-body_problem

    The last general constant of the motion is given by the conservation of energy H. Hence, every n-body problem has ten integrals of motion. Because T and U are homogeneous functions of degree 2 and −1, respectively, the equations of motion have a scaling invariance: if q i (t) is a solution, then so is λ −2/3 q i (λt) for any λ > 0. [18]

  3. Laws of thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Laws_of_thermodynamics

    [5] [6] [7] These concepts of temperature and of thermal equilibrium are fundamental to thermodynamics and were clearly stated in the nineteenth century. The name 'zeroth law' was invented by Ralph H. Fowler in the 1930s, long after the first, second, and third laws were widely recognized.

  4. Continuous and Comprehensive Evaluation - Wikipedia

    en.wikipedia.org/wiki/Continuous_and...

    Continuous and Comprehensive Evaluation (CCE) was a process of assessment, mandated by the Right to Education Act, of India in 2009.This approach to assessment was introduced by state governments in India, as well as by the Central Board of Secondary Education in India, for students of sixth to tenth grades and twelfth in some schools.

  5. Newton's cradle - Wikipedia

    en.wikipedia.org/wiki/Newton's_cradle

    For example, five balls have four colliding points and scaling (dividing) three of them by the fourth gives the three extra variables needed to solve for all five post-collision velocities. Newtonian, Lagrangian, Hamiltonian, and stationary action are the different ways of mathematically expressing classical mechanics. They describe the same ...

  6. Classical mechanics - Wikipedia

    en.wikipedia.org/wiki/Classical_mechanics

    Classical mechanics was traditionally divided into three main branches. Statics is the branch of classical mechanics that is concerned with the analysis of force and torque acting on a physical system that does not experience an acceleration, but rather is in equilibrium with its environment. [3]

  7. Archimedes' principle - Wikipedia

    en.wikipedia.org/wiki/Archimedes'_principle

    Suppose that, when the rock is lowered into the water, it displaces water of weight 3 newtons. The force it then exerts on the string from which it hangs would be 10 newtons minus the 3 newtons of buoyant force: 10 − 3 = 7 newtons. Buoyancy reduces the apparent weight of objects that have sunk completely to the sea-floor.

  8. Mass in special relativity - Wikipedia

    en.wikipedia.org/wiki/Mass_in_special_relativity

    [7] [8] The notion of mass as a property of an object from Newtonian mechanics does not bear a precise relationship to the concept in relativity. [9] Relativistic mass is not referenced in nuclear and particle physics, [ 1 ] and a survey of introductory textbooks in 2005 showed that only 5 of 24 texts used the concept, [ 10 ] although it is ...

  9. Magnetic levitation - Wikipedia

    en.wikipedia.org/wiki/Magnetic_levitation

    Magnetic levitation can be stabilised using different techniques; here rotation (spin) is used. Magnetic levitation (maglev) or magnetic suspension is a method by which an object is suspended with no support other than magnetic fields.