2- A semi infinite slab with T₁= 200° C suddenly has its surface temperature lowered to Ts=70 C. How long will it take when the temperature at a depth 4 cm has dropped to 120-C also determine the surface heat flux. Take for the slab: a = 8.4 x 10-5 m² /s and k = 215 W/m - C

Elements Of Electromagnetics
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2- A semi infinite slab with T₁ = 200° C suddenly has its surface temperature lowered to Ts=70 C.
How long will it take when the temperature at a depth 4 cm has dropped to 120°C also determine
the surface heat flux. Take for the slab: a = 8.4 x 10-5 m² /s and k = 215 W/m C
Transcribed Image Text:2- A semi infinite slab with T₁ = 200° C suddenly has its surface temperature lowered to Ts=70 C. How long will it take when the temperature at a depth 4 cm has dropped to 120°C also determine the surface heat flux. Take for the slab: a = 8.4 x 10-5 m² /s and k = 215 W/m C
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