In natural convection heat transfer, the correlating parameter is the_______________________?

A. ∞
B. 0
C. Equal to the difference between hot and cold fluids inlet temperature
D. Equal to the difference between hot fluid inlet temperature and cold fluid outlet temperature

A. 0
B. 0.5
C. 1
D. 5

A. √(ΔT1 . ΔT2)
B. 2 (ΔT1 . ΔT2)/(ΔT1 + ΔT2)
C. 2 (ΔT1 . ΔT2)/(ΔT1 – ΔT2)
D. (ΔT1 – ΔT2)/(ΔT1 . ΔT2)

A. (ΔT)2
B. (ΔT)4
C. (ΔT)3
D. √(ΔT)

A. 0
B. 1
C. > 1
D. Between 0 and 1