# An oil gusher shoots crude oil 25.0 m into the air through a pipe with a 0.100-m

## 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 kg/m^{3} and its viscosity to be 1.00 (N/m^{2}).s (or 1.00 Pa · s). Note that you must take into account the pressure due to the 50.0-m column of oil in the pipe.

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