A long copper rod of diameter 2.0 cm that is initially at a uniform temperature of 100°C (refer to the Figure) is suddenly exposed to an air stream at 20°C with a heat transfer coefficient of 200 W/m- K. How long would it take for the copper road to cool to an average temperature of 25°C? Take the properties of copper as k = 401 W/m-°C, p = 8933 kg/m', and c,= 0.385 kJ/kg•°C. D=2 cm T,= 100 °C

A long copper rod of diameter 2.0 cm that is initially at a uniform temperature of 100°C (refer to the Figure) is suddenly exposed to an air stream at 20°C with a heat transfer coefficient of 200 W/m- K. How long would it take for the copper road to cool to an average temperature of 25°C? Take the properties of copper as k = 401 W/m-°C, p = 8933 kg/m', and c,= 0.385 kJ/kg•°C. D=2 cm T,= 100 °C

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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