A long 18-cm-diameter bar made of hardwood (k = 0.159 W/m K, = 1.75
Question:
A long 18-cm-diameter bar made of hardwood (k = 0.159 W/m · K, α = 1.75 × 10-7 m2/s) is exposed to air at 30°C with a heat transfer coefficient of 8.83 W/m2·K. If the center temperature of the bar is measured to be 15°C after a period of 3-hours, the initial temperature of the bar is
(a) 11.9°C
(b) 4.9°C
(c) 1.7°C
(d) 0°C
(e) 29.2°C
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Step by Step Answer:
We can solve this problem using the onedimensional heat conduction equation and the concept of lumpe...View the full answer
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Related Book For 
Heat And Mass Transfer Fundamentals And Applications
ISBN: 9780073398181
5th Edition
Authors: Yunus Cengel, Afshin Ghajar
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