(Solved): The Prandtl number, NPr, is a dimensionless group important in heat-transfer calculations. It is ...

The Prandtl number, $N_{\mathrm{Pr}}$, is a dimensionless group important in heat-transfer calculations. It is defined as $C_p?/k$, where $C_p$ is the heat capacity of the fluid, $?$ is the fluid viscosity, and $k$ is the thermal conductivity. For a particular fluid, $\mathrm{Cp}=1.243\mathrm{J}/\left({\mathrm{g}}^{?}\mathrm{C}\right),\mathrm{k}=0.536\mathrm{W}/\left({\mathrm{m}}^{?}\mathrm{C}\right)$, and $?=2736\mathrm{lb}/(\mathrm{ft}\mathrm{h})$. Calculate ${\mathrm{N}}_{\mathrm{Pr}}$. $\times 10^3$.