Problem

A 10 cm × 12 cm × 14 cm rectangular prism object made of hardwood (ρ = 721 kg/m3, cp = 1....

A 10 cm × 12 cm × 14 cm rectangular prism object made of hardwood (ρ = 721 kg/m3, cp = 1.26 kJ/kg•ºC) is cooled from 100ºC to the room temperature of 20ºC in 54 minutes. The approximate heat transfer coefficient during this process is

(a) 0.47 W/m2•ºC

(b) 5.5 W/m2•ºC

(c) 8 W/m2•ºC

(d) 11 W/m2•ºC

(e) 17,830 W/m2•ºC

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A 10 cm × 12 cm × 14 cm rectangular prism object made of hardwood (ρ = 721 kg/m3, cp = 1....

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