1. Not finding help here? Sign up for a free 30min 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!

What am i doing wrong (water thru a tube question)

  1. Jan 17, 2008 #1
    1. The problem statement, all variables and given/known data

    A tube of radius 6.000 cm is connected to tube of radius 1.000 cm as shown above. (see attachment)..

    Water is forced through the tube at a rate of 20.97 liters/min. The pressure in the 6 cm tube is 1.015×105 Pa. The density of water is 1000 kg/m3. Assume that the water is nonviscous and incompressible, and keep at least four digits in your computations.

    (a) What is the velocity of the water in the 6 cm radius tube?
    this is easy but i keep getting wrong answer --dont know why???

    2. Relevant equations



    3. The attempt at a solution
    heres what i did
    Im = v * A (that is, flow rate = velocvity times area)

    so after conversions (20.97l/m /60 * 10^-3 = m^3) i have

    Im = 3.495*10^-4m/s * .011 (pie*.06^2)
    = 3.845*10^-6m/s

    this is wrong.
    Why???

    please help... thanks!


    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Jan 17, 2008 #2
  4. Jan 17, 2008 #3
    well i didnt put brackets in right place.
    should be
    (20.97l/m /60) * 10^-3 = m^3)

    =3.495*10^-4

    still doesnt solve prob though.
    any other help?? please help!??
     
  5. Jan 17, 2008 #4

    rl.bhat

    User Avatar
    Homework Helper

    flow rate = velocvity times area
    Hence velocity = flow rate/area
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: What am i doing wrong (water thru a tube question)
  1. What am I doing wrong? (Replies: 15)

  2. What Am I Doing Wrong? (Replies: 2)

  3. What am I doing wrong? (Replies: 1)

Loading...