a) 0.5 – 1000 (W/(m2K))
b) 50 – 3000 (W/(m2K))
c) 10 – 1000 (W/(m2K))
d) 50 – 10000 (W/(m2K))
Answer: d
Explanation: Convective heat transfer coefficients for air under natural convection is 0.5 – 1000 (W/(m2K)). For liquids under natural convection is 50 – 3000 (W/(m2K)). For air under forced convection it is 10 – 1000 (W/(m2K)). For liquids under forced convection it is 50 – 10000 (W/(m2K)).
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