3) Air at 20•C blows over a hot plate 50 by 75 cm maintained at 250•C. The convection heat- transfer coefficient is 25 W/m2 ·•C. Calculate the heat transfer. 4) Assuming that the plate in Problem 3 is made of carbon steel (k=43 W/m K) 2 cm thick and that 300 W is lost from the plate surface by radiation, calculate the inside plate temperature. (Hint qcond=qconv+qrad).

3) Air at 20•C blows over a hot plate 50 by 75 cm maintained at 250•C. The convection heat- transfer coefficient is 25 W/m2 ·•C. Calculate the heat transfer. 4) Assuming that the plate in Problem 3 is made of carbon steel (k=43 W/m K) 2 cm thick and that 300 W is lost from the plate surface by radiation, calculate the inside plate temperature. (Hint qcond=qconv+qrad).

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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Free Body Diagram

The system of forces acting on a body tends to either rotate it or make the body undergo motion. In general, when an external agent exerts a force on a body, the body undergoes translational motion and rotational motion. The body has six degrees of freedom under the influence of that force. Here, three degrees of freedom are from the translational motion while the other three are from the rotation motion. However, sometimes the bodies are not allowed to undergo any motion and are fixed, under such conditions the body is said to be constrained.

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only problem 4

3) Air at 20•C blows over a hot plate 50 by 75 cm maintained at 250•C. The convection heat-
transfer coefficient is 25 W/m2 ·•C. Calculate the heat transfer.
4) Assuming that the plate in Problem 3 is made of carbon steel (k=43 W/m K) 2 cm thick and that
300 W is lost from the plate surface by radiation, calculate the inside plate temperature. (Hint
9cond=qconv+qrad).

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