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I found an equation used to calculate the flow of a fluid through a pipe. But I'm having some difficulty with the pressure value I should use in the calculations. It's the flow rate of water moving by atmospheric force. For example if you have a well and you suck up water through a tube, And the water is 12feet down which would be around 5psi, The atmospheric force is 14.7psi. So would I use 9.7psi to determine the upward force because the difference in pressure between 14.7 psi upward and 5 psi downward force.

2. Relevant equations

3. The attempt at a solution

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# Pressure value problem

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