A 200mm diameter spherical steel ball initially at 500°C is rapidly immersed in an oil bath that is at 20°C. The convection coefficient is h = 600W/m²-K, and the steel ball has the following properties: c= 500J/kg-K, p= 7000kg/m³, k = 30W/m-K. Determine the time taken (min) for temperature at the surface of the ball to drop to 100°C.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A 200mm diameter spherical steel ball initially at 500°C is rapidly immersed in an oil
bath that is at 20°C. The convection coefficient is h = 600W/m²-K, and the steel ball has
the following properties: c= 500J/kg-K, p= 7000kg/m³, k=30W/m-K.
Determine the time taken (min) for temperature at the surface of the ball to drop to 100°C.
Transcribed Image Text:A 200mm diameter spherical steel ball initially at 500°C is rapidly immersed in an oil bath that is at 20°C. The convection coefficient is h = 600W/m²-K, and the steel ball has the following properties: c= 500J/kg-K, p= 7000kg/m³, k=30W/m-K. Determine the time taken (min) for temperature at the surface of the ball to drop to 100°C.
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