U$3\mathrm{.}4$ The fluids given below flow through a pipe with an inner diameter of $100mm$ pipe at a temperature of $20C.$ Their volumetric flow rate is $0\mathrm{.}8d{m}^3{s}^{-1}.$ Determine the flow regime $($laminar$,$ transient, turbulent$)$ for: a$)$ hydrogen $($kinematic viscosity $($:$v=1\mathrm{.}08*{10}^{-4}{m}^2{s}^{-1}\})$ air $),$

c$)$ gasoline $)=(4\mathrm{.}06*{10}^{-7}{m}^2{s}^{-1},$

d$)$ water.

Result: a$)$ laminar, $Re=94,$ b$)$ laminar, $Re=675,$ c$)$ turbulent, $Re=25088,$ d$)$ turbulent, $Re=10165.$