A 6.0 mm thick plate of pure copper has an initial temperature of 90°C. The plate is thensuddenly immersed in 20°C water where the heat transfer coefficient is 250 W/m²-K.Show that the plate is lumped, and then find the time required for the plate to achieve atemperature of 40°C.

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Engineering

Mechanical Engineering

Show that the plate is lumped, and then find the time required for the plate to achieve a temperature of 40°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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Question

A 6.0 mm thick plate of pure copper has an initial temperature of 90°C. The plate is then
suddenly immersed in 20°C water where the heat transfer coefficient is 250 W/m²-K.
Show that the plate is lumped, and then find the time required for the plate to achieve a
temperature of 40°C.

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