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12mm diameter Steel balls are annealed by heating to 1150 K and then slowly cooling to 400K in an air environment for which T 00 = 325 K and h=20 W/m² K. If the properties of the steel are k = 40 W/m K, p= 7800 kg/ m° and c, = 600 J/kg-K, what will be the d. time required for the cooling process? A 17 min B 19 min C 16 min D 15 min

12mm diameter Steel balls are annealed by heating to 1150 K and then slowly cooling to 400K in an air environment for which T 00 = 325 K and h=20 W/m² K. If the properties of the steel are k = 40 W/m K, p= 7800 kg/ m° and c, = 600 J/kg-K, what will be the d. time required for the cooling process? A 17 min B 19 min C 16 min D 15 min

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
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Q.5 12mm diameter Steel balls are annealed by heating to 1150 K and then slowly cooling to 400K in an air environment for which T = 325 K and h=20 W/m K. If the properties of the steel are k = 40 W/m K, p= 7800 kg/ 6. 3 m° and c = 600 J/kg-K, what will be the time required for the cooling process? A 17 min 19 min C 16 min D 15 min
Transcribed Image Text:Q.5 12mm diameter Steel balls are annealed by heating to 1150 K and then slowly cooling to 400K in an air environment for which T = 325 K and h=20 W/m K. If the properties of the steel are k = 40 W/m K, p= 7800 kg/ 6. 3 m° and c = 600 J/kg-K, what will be the time required for the cooling process? A 17 min 19 min C 16 min D 15 min
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