3 Brass cube "p = 8530 kg/m , c= 380 J/kg.°C, k = 110 W/m.°C, a = 33.9E-6 W/m.°C", side length = 9 mm, are annealed by heating them first to 929°C in a furnace and then allowing them to cool slowly to 130°C in ambient air at 28°C. If the average heat transfer coefficient is 17.3 W/m .°C, how long will the annealing process will (seconds)? %3D

3 Brass cube "p = 8530 kg/m , c= 380 J/kg.°C, k = 110 W/m.°C, a = 33.9E-6 W/m.°C", side length = 9 mm, are annealed by heating them first to 929°C in a furnace and then allowing them to cool slowly to 130°C in ambient air at 28°C. If the average heat transfer coefficient is 17.3 W/m .°C, how long will the annealing process will (seconds)? %3D

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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Question

Brass cube "p = 8530 kg/m , c_= 380 J/kg.°C, k= 110 W/m.°C, a = 33.9E-6 W/m.°C",
side length =9 mm, are annealed by heating them first to 929°C in a furnace and then
allowing them to cool slowly to 130°C in ambient air at 28°C. If the average heat
transfer coefficient is 17.3 W/m .°C, how long will the annealing process will (seconds)?

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