In the human body, blood vessels can dilate, or increase their radii, in response to various stimuli, so that the volume flow rate of the blood increases. Assume that the pressure at either end of a blood vessel, the length of the vessel, and the viscosity of the blood re- main the same, and determine the factor Ralated/Rpormal by which the radius of a vessel must change in order to double the volume flow rate of the 79. blood through the vessel.

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Q: Question 27

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