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Homework Help: Blood Pressure?

  1. Nov 5, 2007 #1
    1. The problem statement, all variables and given/known data
    Normal blood speed is 0.13 meters/second. If an artery has a narrowing down to one-seventh of the normal cross-sectional area, what is the difference in blood pressures between the normal and constricted segments? Answer is Pascals. Blood density is 1060 kg/meters^3.

    I tried this problem using a number of different equations and am just stumped. My answers range from -429.9 to 422.7!

    I have tried Pressure 2 - Pressure 1=1/2(Density)(Velocity^2 segment 1 -Velocity^2 segment 2)

    I also tried Pressure 2 - Pressure 1 =
    1/2(Density)(Velocity^2 segment 1 [(Area 1/Area 2)(Velocity 1)]^2

    Am I totally wrong with all of my equations?

    Any help would be greatly appreciated!
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
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