Darcy's law is a phenomenologically derived constitutive equation that describes the flow of a fluid through a porous medium. The law was formulated by Henry Darcy based on the results of experiments on the flow of water through beds of sand. It also forms the scientific basis of fluid permeability used in the earth sciences, particularly in hydrogeology.
Read more about Darcy's Law: Background, Description, Additional Forms of Darcy's Law
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“To be a Negro is to participate in a culture of poverty and fear that goes far deeper than any law for or against discrimination.... After the racist statutes are all struck down, after legal equality has been achieved in the schools and in the courts, there remains the profound institutionalized and abiding wrong that white America has worked on the Negro for so long.”
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