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A 40 x 40 cm copper slab # mm thick at a uniform temperature of 250 °C suddenly has its surface temperature lowered 30 °C. Find the time at which the slab temperature becomes 90°C ; p=9000 ke/m’, c=0.38 KJ/kgK, k=370 W/mK and h=00 W/m’K. 2

A 40 x 40 cm copper slab # mm thick at a uniform temperature of 250 °C suddenly has its surface temperature lowered 30 °C. Find the time at which the slab temperature becomes 90°C ; p=9000 ke/m’, c=0.38 KJ/kgK, k=370 W/mK and h=00 W/m’K. 2

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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- A 40 x 40 cm copper slab # mm thick at a uniform temperature of 250 °C suddenly has its surface temperature lowered 30 °C. Find the time at which the slab temperature becomes 90°C ; p=9000 ke/m’, c=0.38 KJ/kgK, k=370 W/mK and h=00 W/m’K. 2
. A 40 x 40 cm copper slab # mm thick at a uniform temperature of 250 °C suddenly has its surface temperature lowered 30 °C. Find the time at which the slab temperature becomes 90°C ; p=9000 kg/m², c=0.38 KJ/kgK, k=370 W/mK and h=90 W/m? K. 2
Transcribed Image Text:. A 40 x 40 cm copper slab # mm thick at a uniform temperature of 250 °C suddenly has its surface temperature lowered 30 °C. Find the time at which the slab temperature becomes 90°C ; p=9000 kg/m², c=0.38 KJ/kgK, k=370 W/mK and h=90 W/m? K. 2
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