Task: Text Categorization
Input (English): When this process is induced by a magnetic field in a paramagnetic system, the critical field for the onset of instability decreases with layer thickness. Two types of this phenomenon are related by the Archimedes number; when that number is very small one of its forms is described by the Peclet number. This phenomenon can be quantified, as long as the product of the Prandtl and Reynolds numbers are greater than one-fifth, by the Churchill-Bernstein equation. A compositional form of this phenomenon generates the earth's magnetic field. Its natural type is governed by the ratio of density difference times little g times length scale cubed to diffusivity times dynamic viscosity, the Rayleigh number. For a boundary, the ratio of this to conduction is given by the Nusselt number. For 10 points, name this mode of heat transfer that relies on the motion of currents in a fluid.
Output (English): Science