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In the case of liquid, the total heat transfer coefficient ( h ) for a long tube is expressed by the following empirical equation: h

In the case of liquid, the total heat transfer coefficient (h) for a long tube is expressed by the following empirical equation:
h=0.023\frac{G^{0.8}k^{0.67}{C_{p}}^{0.33}}{D^{0.2}\mu^{0.47}}
where
G= Mass velocity (kg/m^{2}s)
k= Thermal conductivity (W/m^{\circ}C)
C_{p}= Heat capacity (J/kg^{\circ}C)
D= Diameter of the tube (m)
\mu= Viscosity of the liquid (kg/m~s)
The above equation is dimensionally consistent. Determine the unit of the total heat transfer coefficient (h). Note that I W=1~J/s.(Mark: 7)
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