Steel balls 12 mm in diameter are annealed by heating to 1100 K and then slowly cooling to 360 K in an air environment for wh To = 325 K and h = 20W/m2.K. Assuming the properties of the steel to be k = 40 W/m-K, p = 7800 kg/m³, and c = 600 /kg•K, estimate the time required for the cooling process.
Steel balls 12 mm in diameter are annealed by heating to 1100 K and then slowly cooling to 360 K in an air environment for wh To = 325 K and h = 20W/m2.K. Assuming the properties of the steel to be k = 40 W/m-K, p = 7800 kg/m³, and c = 600 /kg•K, estimate the time required for the cooling process.
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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Transcribed Image Text:Steel balls 12 mm in diameter are annealed by heating to 1100 K and then slowly cooling to 360 K in an air environment for which
T. = 325 Kand h = 20 W/m2-K. Assuming the properties of the steel to be k = 40 W/m-K,p = 7800 kg/m, and c = 600
J/kg-K, estimate the time required for the cooling process.
The time required for the cooling process isi
h.
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