$13$: Water flows through the bend, shown in the figure, at $25C$ at $16\mathrm{.}79k\frac{g}{s}.$ The pipe inside diamete m $,$ the radius of curvature of the bend is $50$ mm $,$ and the average height of the pipe inside surfac ss is $0\mathrm{.}75$ mm $.$ The downstream straight pipe length is $0\mathrm{.}10$ ne that the flow entering the pipe is fully turbulent. As a gineer, estimate the minimum upstream pressure $(P_A)$ overcome the pressure drop associated with the bend wnstream pipe if the downstream pressure $P_B$ is $105$ kPa $.$ pllowing properties of water: density $997k\frac{g}{m^3}$ and a iscosity of $0\mathrm{.}000855$ Pa$.$s$.$