Mastering Physics: MFHWos- Guogle Chreme Reushl 1520W270 Secure https://session

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Mastering Physics: MFHWos- Guogle Chreme Reushl 1520W270 Secure https://session master ngphysics.com/myct item ?assignment ro lemlD 3263118 offsetnext e KMPHW06 day: Statics 419 Problem 27.50 Written #6, Online #6, Statics #20 Variations in the resistvity of blood can givea valuable clues aboul charges in vaious pwelies ot the blod Suppase a medical device artaches two electrodes into a 2.0 mm diameter vein at psilios 5 2 cm apail Part A pdf What is the blood resistivity if a 9.0 V potential difference causes a 210 A current through the blood in the wein? ? Gcoole . Value MrAfer rity Sc Submit Incorrect; Try Again; 4 attempts remaining Eriter your answer using diicnsions of resislivily IMG 0227

Explanation / Answer

from ohms law

V = I*R

therefore R = V/I

V = potential difference applied at the ends

R = resistance of vein = rho*L/A

L = length of vein = 5.2 cm = 0.052 m

A = area of cross section = pi*r^2

r = radius = 2/2 = 1.0 mm = 0.001 m

rho*L/(pi*r^2) = V/I

rho*0.052/(pi*0.001^2) = 9/(210*10^-6)

resistivity rho = 2.59 ohm m

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