Some are empirical fits from measured data and others attempt to incorporate elements of theory.
2.
Maxwell's equations are thus simply an empirical fit to special relativistic effects in a classical model of the Universe.
3.
It is an empirical fit to tabulated data provided in the same reference, and closely agrees with the tabulated data.
4.
While the former position still attracts controversy, the latter position has a better empirical fit with anthropological data about human kinship practices, and is accepted by cultural anthropologists.
5.
It uses empirical fits for the nonlaminar flow ( which may or may not be fine depending on how rough your pipe's interior surface and inter-pipe joints are ) .-- Fuzzyeric 23 : 42, 28 September 2006 ( UTC)
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