7 . Choose the correct answer Hydraulic resistance of a vessel (tube)) is determined by the formula: X=(8eta l^2)/(pi R) X=(8eta l)/(pi R) X=(pi R)/(8eta l) X=(8eta l)/(pi R^4) X=(pi R^4)/(8eta l)

The correct answer is: Explanation:The hydraulic resistance of a vessel (or tube) is determined by the formula , where represents the hydraulic resistance, is the dynamic viscosity of the fluid, is the length of the vessel, and is the radius of the vessel. This formula takes into account the effect of the fluid's viscosity and the vessel's dimensions on the resistance to flow.