Conservation of Momentum
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Conservation of momentum provides the next basic differential equation of the stellar-structure problem. We will derive this in several steps of gradually increasing generality. The first assumes mechanical equilibrium (§2.1), the equation of motion for spherical symmetry follows in §2.4, while in §2.5 even the assumption of spherical symmetry is dropped. In §2.6 we briefly discuss general relativistic effects in the case of hydrostatic equilibrium.
KeywordsSpherical Symmetry Mass Element Hydrostatic Equilibrium Gravitational Mass Gaseous Sphere
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