Heat is generated steadily in a 3-cm-diameter spherical ball. The ball is exposed to ambient air at
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Heat is generated steadily in a 3-cm-diameter spherical ball. The ball is exposed to ambient air at 26°C with a heat transfer coefficient of 7.5 W/m2·K. The ball is to be covered with a material of thermal conductivity 0.15 W/m · K. The thickness of the covering material that will maximize heat generation within the ball while maintaining ball surface temperature constant is
(a) 0.5 cm
(b) 1.0 cm
(c) 1.5 cm
(d) 2.0 cm
(e) 2.5 cm
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Heat And Mass Transfer Fundamentals And Applications
ISBN: 9780073398181
5th Edition
Authors: Yunus Cengel, Afshin Ghajar
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