# Bernoulli and waterflow

1. Mar 30, 2016

### lurifax1

1. The problem statement, all variables and given/known data
http://imgur.com/rhaQabj

2. Relevant equations
https://en.wikipedia.org/wiki/Bernoulli's_principle
https://en.wikipedia.org/wiki/Darcy–Weisbach_equation

3. The attempt at a solution
I've tried to put up to equations on the form:
134=k*sqrt(x+0.6), 75=k*sqrt(x+0.3).

Where k is the constant and x is the height from the bottom of the tank to the exit of the pipe.
I think something must be wrong in my assumptions since I get different k values for the two situations

2. Mar 30, 2016

### SteamKing

Staff Emeritus
Is there a question here?

Simply posting a diagram is insufficient. This is Physics Forums, not Psychics Forums.

3. Mar 30, 2016

### lurifax1

I'm sorry for not being clear. I want to find a function for the waterflow out from the tank depending on the height of the tank. I've already measured the flow out from two different heights. I was wondering if I should try to find a mathematical expression for it based on these two values, or simply find more measurements and linearize it.

4. Mar 30, 2016

### haruspex

Please post your working. You have two independent linear equations with two unknowns (x, k2), so it would be very strange if there is no consistent solution.