A fluid (Prandtl number, Pr = 1) at 500 K flows over a flat plate of 1.5 m length, maintained at 300 K. The velocity of the fluid is 10 m/s. Assuming kinematic viscosity, v = 30×10^−6 m^2/s, the thermal boundary layer thickness (in mm) at 0.5 m from the leading edge is _________.
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