Computer memory chips are mounted on a finned metallic mount to protect them from overheating. A 152 MB memory chip dissipates 5 W of heat to air at 25οC. If the temperature of this chip is to not exceed 60°C, the overall heat transfer coelficient-area product of the finned metal mount must be at least
(a) 0.14W/°C
(b) 0.20 W/°C
(c) 0.32W/°C
(d) 0.48 W/οC
(e) 0.76 W/°C
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