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Need help with this problem

  • Thread starter jrzygrl
  • Start date
  • #1
16
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Homework Statement



A vertical water pipe extends from the bottom to the top of the World Trade Center in the Big Apple (New York City), a distance of about 420 m. Calculate the difference in pressure in atm between the bottom and the top of the water pipe.

Homework Equations



p(y) = p - [tex]\rho[/tex]gy

The Attempt at a Solution



[tex]\rho[/tex]gy = (1 kg/[tex]m^{3}[/tex]) (9.81m/[tex]s^{2}[/tex]) (420m)
[tex]\rho[/tex]gy = 4120.2 Pa
4120.2 Pa (1 atm / 101300 Pa) = .0407 atm

The answer above was wrong. Thanks for the help!

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
Dick
Science Advisor
Homework Helper
26,258
618
The density of water isn't 1kg/m^3. It's 1000kg/m^3!
 
  • #3
16
0
ohhh, thats what was wrong. thanks a lot! :smile:
 

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