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: Gauge Pressure

  1. Jan 14, 2009 #1
    The main water line enters a house on the first floor. The line has a gauge pressure of 2.00 x10^5 Pa.
    (a) A faucet on the second floor, 7.0 m above the first floor, is turned off. What is the gauge pressure at this faucet?




    P2= P1 + (density x g x h)



    (2 x 10^5)= P1 + (1000 x 9.81 x 7)

    P1= 131330 Pa
     
  2. jcsd
  3. Jan 14, 2009 #2

    LowlyPion

    User Avatar
    Homework Helper

    Looks OK.
     
  4. Jan 14, 2009 #3
    Ah, I see the error. Why is the pipe entering the house on the first floor? We all know pipes enter through the basement. Therefore, the height should be negative.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook