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Q4. A thick steel slab (p=7800 kg/m', C-480 J/kg. k, k-50 W/m. k, a 10-5 m2 by water jets impinging one of its surfaces. The temperature of the water is 25 large, approximately uniform convection coefficient of 3500 W/m2C at the s maintained at the temperature of the water throughout the cooling, how long wi 50 C at a distance of 25 mm from the surface?

Q4. A thick steel slab (p=7800 kg/m', C-480 J/kg. k, k-50 W/m. k, a 10-5 m2 by water jets impinging one of its surfaces. The temperature of the water is 25 large, approximately uniform convection coefficient of 3500 W/m2C at the s maintained at the temperature of the water throughout the cooling, how long wi 50 C at a distance of 25 mm from the surface?

Elements Of Electromagnetics
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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To Q4. A thick steel slab (p-7800 kg/m', C-480 J/kg. k, k-50 W/m. k, a 10-5 m2 /s ) is initially at 300 C and is cooled by water jets impinging one of its surfaces. The temperature of the water is 25 C, and the jets maintain an extremely large, approximatefy uniform convection coefficient of 3500 W/m2C at the surface. Assuming that the surface is maintained at the temperature of the water throughout the cooling, how long will it take for the temperature to reach 50 C at a distance of 25 mm from the surface?
Transcribed Image Text:To Q4. A thick steel slab (p-7800 kg/m', C-480 J/kg. k, k-50 W/m. k, a 10-5 m2 /s ) is initially at 300 C and is cooled by water jets impinging one of its surfaces. The temperature of the water is 25 C, and the jets maintain an extremely large, approximatefy uniform convection coefficient of 3500 W/m2C at the surface. Assuming that the surface is maintained at the temperature of the water throughout the cooling, how long will it take for the temperature to reach 50 C at a distance of 25 mm from the surface?
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