The buildup of plaque on the walls of an artery may decrease its diameter from 1.1 cm to 0.90 cm. The speed of blood flow was 17 cm/s before reaching the region of plaque buildup. Fid the speed of blood flow within the plaque region. (i found the speed to be 25 cm/s and its correct)
Find the pressure drop within the plaque region.
(i tried using the formula delta P = 1/2*rho*(V2^2 - V1^2) i got 17.8 Pa but its not right)
What am i doing wrong ?

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i said (1/2)(1000)(.254^2 - .17^2)=17.8

my answer is 16.8Pa.
well method is correct.

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