I have the question and the answer but just keep getting a different answer so here it goes.(adsbygoogle = window.adsbygoogle || []).push({});

Darcy law h=(4fLv2(square root sign))/2gD

h=head of water(m)

f=Friction coefficient (0.007)

L= equivalent length of pipework (m)

v= velocity (m/s)

g= acceleration due to gravity (9.81m/s2)

D= pipe diameter

Q. Over a distance of 25m, a 25mm diameter pipe loses 7m of pressure. Using the D'Arcy Equation, determine the velocity of water in the pipe and the flowrate in litres per second.

Answer = v= 0.215m/s q= 1.086l/s

Any help would be great thanks

My attempt

7=4x.007x25xv2/2x9.81x.025

v2=5x2x9.81x.025/4x.007x25

v2= 2.4525/.7

v2=3.5035

v=1.87m/s

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# Homework Help: D'arcys Equation

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