Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Bernoulli's equation. Need help asap!

  1. Jun 17, 2010 #1
    1. The problem statement, all variables and given/known data
    A very simplified schematic of the rain drainage system for a home is shown. Rain falling on the slanted roof runs off into gutter around the roof edge it then drains through downspouts into a main drainage pipe M below the basement which carries the water to an even larger pipe below the street. Apply the following:

    1.)the downspouts have h1= 11m
    2.)the floor drain has height h2=1.2m
    3.)pipe M has radius 3cm
    4.) the house has side width w=30 m and front length L=60 m
    5.) all the water striking the roof goes through pipe M
    6.) the initial speed of the water in a downspout is negligible
    7.) the wind speed is negligible

    At what rainfall rate, in centimeters per hour, will water from pipe M reach the height of the floor drain and threaten to flood the basement.

    2. Relevant equations

    p+ .5 rho v^2+rho gh=p+.5 rho v^2+rho gh

    3. The attempt at a solution
    A=a so V=V

    Attached Files:

  2. jcsd
  3. Jun 17, 2010 #2
    I also figured out that the v at the end of the pipe of length h1= 146 cm/s by using v^2=v0^2+2gh
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook