Q.

The rate of heat transfer from a vertical plate by natural convection depends upon the temperature differences (ΔT) between wall and outside bulk. The proportionality is given as

A. (ΔT) 1/4
B. (ΔT) 1/2
C. (ΔT) 5/4
D. (ΔT) 3/4
Answer» D. (ΔT) 3/4
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