# Physics

Water flows at 0.25L/s through a 9.0-m-long garden hose 2.0cm in diameter that is lying flat on the ground.The temperature of the water is 20degC. What is the gauge pressure of the water where it enters the hose? in Pa

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1. Use the formula
Q=pi*R^4*P/8*n*L

n= viscosity of the fluid
L= length

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2. THANKS
After conversions Q = 2.5*10-4; if I plug this into my equation:
p= [(8nL)*Q]/pi*R^4
p=[(8*(1.0*10-3 Pa*s)*9m)*2.5*10-4m3/s]/pi*0.01m4
p= 1.8*10-5/3.14*10-8 p = 573.2 Pa

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posted by KIM

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