1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Biomedical Eng. HW Prob! Help!

  1. Sep 19, 2009 #1
    ***Biomedical Eng. HW Prob! Help!***

    1. The problem statement, all variables and given/known data
    http://img11.imageshack.us/img11/3586/20582546.jpg [Broken]

    2. Relevant equations

    3. The attempt at a solution

    all i know is the the sum of flow rate in is equal to the sum of flow rate out
    so i did
    0.1 mg/ml * 1200 ml/min = 1.5 ml/min*5 mg/ml + mass flow rate blood.
    and the m flow rate for blood is equal to 112.5 mg/min
    i really don't know what to do next..plz help.
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Sep 19, 2009 #2
    Re: ***Biomedical Eng. HW Prob! Help!***

    can anyone please help?
  4. Sep 22, 2009 #3
    Re: ***Biomedical Eng. HW Prob! Help!***

    first do an overall mass balance


    then do your component balances


    here you only have 3 unknowns. plug and chug, but make sure your units match up since some of your givens are funky.
  5. Sep 23, 2009 #4
    Re: ***Biomedical Eng. HW Prob! Help!***

    one other thing to note in this problem is that we're not really doing a mass balance, but a volumetric flow balance. you can ONLY do volumetric flow balances when your density is constant, otherwise you must convert each stream into a mass flow rate!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook