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What radius needle should be used to inject a volume of 485 cm3 of a solution...

What radius needle should be used to inject a volume of 485 cm3 of a solution into a patient in 28 min? Assume the length of the needle is 2.5 cm and that the solution is elevated 1.0 m above the point of injection. Further, assume the viscosity and density of the solution are those of pure water, and that the pressure inside the vein is atmospheric. (The density of water is 1.00 ✕ 103 kg/m3.)

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