Calculate the pressure in psia and $K\frac{N}{m^2}$ in a spherical tank at the bottom of the tank filled with oil and having a diameter of $8ft.$ The top of the tank is vented to the atmosphere having a pressure of $14\mathrm{.}72$ psia. The density of the oil is $0\mathrm{.}922\frac{g}{c}{m}^3.$

Water flows through pipes A and B$.$ Oil with specific gravity $0\mathrm{.}8$ is in the upper portion of the inverted $U$ manometer. Mercury with $SG=13\mathrm{.}6$ is in the bottom of the manometer bends. Determine the pressure difference $P_A-P_B$ in units of $1\frac{b_f}{i}{n}^2.$

Find the pressure difference $P_A-P_B$ below, if $Z_A=1\mathrm{.}6m,Z_1=0\mathrm{.}7m,Z_2=2\mathrm{.}1m,Z_3=0\mathrm{.}9m$ and $Z_B=1\mathrm{.}8m.$

Fluids in the figure are: $1$ and $3$ Water, $2$ and $4$ Mercury.