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Homework Help: Blood Speed in an Arteriole

  1. May 2, 2012 #1
    1. The problem statement, all variables and given/known data

    A typical Arteriole has a diameter of .030 mm and carries blood at the rate of 5.5* 10^-6 cm^3/s. What is the speed of the blood in an arteriole?

    2. Relevant equations


    3. The attempt at a solution

    Blood is made of mostly water, so I used the same ρ as water (ρ=1000), and multiplied by the velocity given. I have the diameter, but I am not sure what do do with it or how to find the pressure.
  2. jcsd
  3. May 3, 2012 #2
    Volumetric flow is given by:

    Q=A*V and has the units of volume per unit time. A is area, V is velocity

    So, determine the velocity from the above equation.
  4. May 3, 2012 #3
    I already have velocity, I am looking for speed
  5. May 3, 2012 #4
    Speed is the magnitude of velocity. Velocity is a vector entity. It has both magnitude and direction. Speed is only the magnitude of velocity.
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