In the context of magnetohydrodynamics, the physics of conductive fluids, the magnetic energy density behaves like an additional pressure that adds to the plasma.
2.
Where W is the total energy stored in the original cavity and \ bar { w _ e } and \ bar { w _ m } are magnetic energy densities respectively.
3.
Thus, the rest energy density of the plasma, n�m�c 2, is less than or equal to the magnetic energy density B ^ 2 / ( 2 \ mu _ 0 ) of the magnetic field.
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