The depth of a fluid is measured in vertical Z – direction; X and Y are the other two directions and are mutually perpendicular. The static pressure variation in the fluid is given by
1
\(\frac{{dp}}{{dz}} = g\)
2
\(\frac{{dp}}{{dz}} = 0\)
3
\(\frac{{dp}}{{dz}} = \rho g\)
4
\(\frac{{dp}}{{dz}} = - \rho g\)
5
\(\frac{{dp}}{{dz}} = - g\)