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Through a retinery, fuel ethand is Flowing in a pipe at a velocity of $1$ ms and at mospheric presure. The refinery needs the ethanol to be at a pressure of $2$ atm. On a lower level. How far must the pine drop in height in order to achieve this pressure? Assump that the velocity does not Chanse and the density of ethanol is $789$ kg$/{}^{}$m3.

$\frac{p_1}{p_{xy}}+\frac{c_1^2}{zg}+z_1=\frac{p_2}{p_{x9}}+\frac{c_2^2}{2g}+29$

$\frac{p_1}{p_{xy}}+z_1=\frac{p_2}{p_{x9}}+z_2(velocity$ does not change$).$