8. A large block of concrete with a thickness of 50 cm is exposed to thermal ra- diation resulting in the surface temperature to be maintained at 100 C. If the op- posing surface is kept at 50 C, find a) the rate of heat transfer at steady state condi- tion per unit surface area and b) temperature at a distance 30 cm from the hot surface. Assume the concrete thermal conductivity remains constant throughout the block at 1.4 W/m-K. [Ans.: a) 140 W/m² and b) 70 CJ.
8. A large block of concrete with a thickness of 50 cm is exposed to thermal ra- diation resulting in the surface temperature to be maintained at 100 C. If the op- posing surface is kept at 50 C, find a) the rate of heat transfer at steady state condi- tion per unit surface area and b) temperature at a distance 30 cm from the hot surface. Assume the concrete thermal conductivity remains constant throughout the block at 1.4 W/m-K. [Ans.: a) 140 W/m² and b) 70 CJ.
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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REFERENCE: FROM BOOK - ENGINEERING THERMOFLUIDS, M. MASSOUD
![8. A large block of concrete with a thickness of 50 cm is exposed to thermal ra-
diation resulting in the surface temperature to be maintained at 100 C. If the op-
posing surface is kept at 50 C, find a) the rate of heat transfer at steady state condi-
tion per unit surface area and b) temperature at a distance 30 cm from the hot
surface. Assume the concrete thermal conductivity remains constant throughout
the block at 1.4 W/m-K. [Ans.: a) 140 W/m and b) 70 C].](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe211268a-8b5c-4726-80c1-f80980dc640a%2Fd54b2566-696b-4751-8d19-7c1049164be2%2Fulw68cl_processed.png&w=3840&q=75)
Transcribed Image Text:8. A large block of concrete with a thickness of 50 cm is exposed to thermal ra-
diation resulting in the surface temperature to be maintained at 100 C. If the op-
posing surface is kept at 50 C, find a) the rate of heat transfer at steady state condi-
tion per unit surface area and b) temperature at a distance 30 cm from the hot
surface. Assume the concrete thermal conductivity remains constant throughout
the block at 1.4 W/m-K. [Ans.: a) 140 W/m and b) 70 C].
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