Equation of Continuity:

$m^{}=\frac{}{b}ar(v)S=Q$

Settling $K-$test:

$K=f*R{e}^2=\frac{4d_{}^3({}_s-)g}{3{}^2},v_t=\sqrt[\phantom{2}]{\frac{4d_{}({}_s-)g}{3f}},Re=\frac{d_p{v}_t}{}$

$If$:

$If$: $46K1\mathrm{.}14{10}^5,Re=(\frac{K}{18\mathrm{.}5}{)}^{\frac{5}{7}},f=\frac{18\mathrm{.}5}{R{e}^{\frac{3}{5}}}$

$If$: $K>1\mathrm{.}14{10}^5,Re=\sqrt[\phantom{2}]{\frac{K}{0\mathrm{.}44}},f=0\mathrm{.}44$