Poiseuille's law is summarized this way: A) PV = nRT B) R Lη/r⁴ C) P = 2T/r D) P₁V₁ = P₂V₂

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Poiseuille's law is a formula that describes the flow of fluids through a narrow tube or pipe. It states that the flow rate (Q) is directly proportional to the fourth power of the radius (r) and the pressure difference (ΔP) and inversely proportional to the viscosity (η) and the length of the tube (L). This relationship is mathematically expressed as Q = πr^4(ΔP)/(8ηL), which can be rearranged to the form shown in choice B using algebraic manipulation.

Poiseuille's Law Is Summarized This Way