2. An 18-cm-long, 16-cm-wide, and 12-cm-high metal block (p = 8000 kg/m', c, = 400 J/kg C, k=200 W/mK) initially at 20 "C is placed in an oven at 600 °C for heat treatment. The heat transfer coefficient on the surface of the block is 40 W/m2 "C. How long time is required for the iron block to reach a temperature of 400 °C? 1321 35°C Güneş 1437 2021

2. An 18-cm-long, 16-cm-wide, and 12-cm-high metal block (p = 8000 kg/m', c, = 400 J/kg C, k=200 W/mK) initially at 20 "C is placed in an oven at 600 °C for heat treatment. The heat transfer coefficient on the surface of the block is 40 W/m2 "C. How long time is required for the iron block to reach a temperature of 400 °C? 1321 35°C Güneş 1437 2021

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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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

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2. An 18-cm-long, 16-cm-wide, and 12-cm-high metal block (p = 8000 kg/m', c, = 400 J/kg°C,
k=200 W/mK) initially at 20 °C is placed in an oven at 600 °C for heat treatment. The heat
transfer coefficient on the surface of the block is 40 W/m "C. How long time is required for
the iron block to reach a temperature of 400 °C?
1321
35°C Güneş
1407 20021

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