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Fluid dynamics question

by lch20yy
Tags: dynamics, fluid
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lch20yy
#1
Dec9-12, 12:39 AM
P: 5
1. The problem statement, all variables and given/known data

water in main pipe at the street level is at a gauge pressure of 170 KPa and is moving with neglibible speed. A pipe connected to the main pipe is used to deliver the water to kitchen located on the third floor of a building, at a 15-m height from the street level. what is the maximum possible velocity with which the water can emerge from an open kitchen faucet?

2. Relevant equations

p1+1/2 rho G v^2+rho G H = p2 + 1/2 rho G v^2 + rho G H

3. The attempt at a solution

i have the equation p1=p2+1/2(rho)GV^2+(rho)G H
since p1 speed is negligible and height is 0. im not sure abount what p2 is. is it the atmosphere pressure?
the answer is 6.8m/s, but i cant get the answer. pls help
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haruspex
#2
Dec9-12, 01:27 AM
Homework
Sci Advisor
HW Helper
Thanks
P: 9,651
Quote Quote by lch20yy View Post
p1+1/2 rho G v^2+rho G H = p2 + 1/2 rho G v^2 + rho G H
A spare couple of Gs in there.
im not sure abount what p2 is. is it the atmosphere pressure?
P1 is given as gauge pressure, which means it's the additional pressure beyond atmospheric. So what do you think you should use for P2?
lch20yy
#3
Dec9-12, 01:38 AM
P: 5
ok i got this ... i got the equation wrong


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