Problem $3(8\mathrm{.}7).$ Consider pressurized water, engine oil $($unused$),$ and NaK $(22\frac{\%}{78}\%)$ flowing in a $20-$mm$-$diameter tube. The fluid temperature is $366$ K and the flow rate is $0\mathrm{.}01$ kg$/$s$.$

Determine:

a$.)$ The mean velocity of the water

b$.)$ The hydrodynamic entry length of the water

c$.)$ The thermal entry length of the water

c$.)$ The mean velocity of the engine oil

d$.)$ The hydrodynamic entry length of the engine oil

e$.)$ The thermal entry length of the engine oil

f$.)$ The mean velocity of the NaK

g$.)$ The hydrodynamic entry length of the NaK

h$.)$ The thermal entry length of the NaK