Determing speed of water

  1. 1. The problem statement, all variables and given/known data
    River Pascal with a volume flow rate of 4.7×105 joins with River Archimedes, which carries 1.1×106 , to form the Bernoulli River. The Bernoulli River is 130 wide and 30 deep.

    What is the speed of the water in the Bernoulli River?
    2. Relevant equations
    Express your answer using two significant figures.


    3. The attempt at a solution
    I attempted to guesses so far.
    0.120 m/s was wrong
    1.20 m/s was wrong



    Thanks for all the help.
    Jared
     
  2. jcsd
  3. tiny-tim

    tiny-tim 26,053
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi Jared! Welcome to PF! :smile:

    (try using the X2 tag just above the Reply box :wink:)
    Show us your full calculations, and then we can see what went wrong, and we'll know to help! :smile:
     
  4. For vfr=4.7*105L/s

    I used the equation 4.7*105/3900 equals 1.2m/s

    Thanks for the help.
    Jared
     
  5. tiny-tim

    tiny-tim 26,053
    Science Advisor
    Homework Helper

    Hi Jared! :smile:

    (just got up :zzz: …)
    oh i see … you only used the volume flow rate of River Pascal.

    The Bernoulli River contains the water of both River Pascal and River Archimedes. :wink:
     
  6. @tiny-tim- Did you come up with an answer of .40m/s where that incportates both rivers?

    Thanks for your help,

    Jared
     
  7. tiny-tim

    tiny-tim 26,053
    Science Advisor
    Homework Helper

    I go 4.0 times something

    what are the units of the problem? :confused:
     
  8. 4.7*105L/s and 1.1*106L/s. 130m wide and 30m deep.

    The answer needs to be expressed in m/s.
     
  9. tiny-tim

    tiny-tim 26,053
    Science Advisor
    Homework Helper

    oh, litres! :rolleyes:

    ok, then i make it .40m/s :smile:
     
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