Heat Transfer
Pick out the correct equation.

JH = (St)(Pr)1/3 = f/2
JH = (St)(Pr)2/3 = f/2
JH = (St)1/3(Pr) = f/2
JH = (St)2/3(Pr) = f/2

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Heat Transfer
In the equation Q = UAΔt; Δt is

Geometric mean temperature difference
Logarithmic mean temperature difference
Arithmetic mean temperature difference
The difference of average bulk temperatures of hot and cold fluids

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