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Homework Help: Bernoulli problems

  1. Jan 15, 2008 #1
    1. The problem statement, all variables and given/known data

    A long horizontal hose of diameter 3.8 cm is connected to a faucet. At the other end, there is a nozzle of diameter 1.8 cm. Water squirts from the nozzle at velocity 38 m/sec. Assume that the water has no viscosity or other form of energy dissipation.


    a) What is the velocity of the water in the hose ?
    this is no prob
    A1V1 = A2V2
    8.61m/s OK


    b) What is the pressure differential between the water in the hose and water in the nozzle ?
    i am stuck on this one.




    2. Relevant equations



    3. The attempt at a solution

    heres what im doing...
    use bernoulli..

    P2-P1 = (1/2pv^2)1 - (1/2pv^2)2

    P2 - P1 = 634.934Pa
    this is wrong.

    please help ! thanks
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jan 14, 2009 #2
    Did you multiply by rho?
     
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