Question
An oil gusher shoots crude oil 25.0 m into the air through a pipe with a 0.100-m diameter. Neglecting air resistance but not the resistance of the pipe, and assuming laminar flow, calculate the gauge pressure at the entrance of the 50.0-m- long vertical pipe. Take the density of the oil to be $900 \textrm{ kg/m}^3$ and its viscosity to be $1.00 \textrm{ N/m}^2$ (or $1.00 \textrm{ Pa}$). Note that you must take into account the pressure due to the 50.0-m column of oil in the pipe.

$3.99 \times 10^6 \textrm{ Pa}$

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