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Please Answer Correctly !!! One part of a flat wall that has a thickness of 0.1...

Please Answer Correctly !!!

One part of a flat wall that has a thickness of 0.1 m was initially 250 temperature
oC. Then the part is submerged into a 30 oC temperature oil bath. If
it is assumed that the convection heat transfer coefficient is 500 W / m2
.K and wall
has the characteristic k = 50 W / m.K; ρ = 7835 kg / m3
; Cp = 465 J / kg.K., Specify
wall surface temperature after submerging into oil bath for 9 minutes.

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Answer #1

To= 30°c kell 2.- O.1m L= 0.05 m Ti = 250°C To: 3000 h= 500 wlmek k= 50 w/mk 7835 kg/mo pa 465 J/kg k te 9 min - 540 pec a= kand Biof Number hL Bio SODXD03 Тр 0.5 -1 Bi 2 from heisler chart Fo= 2.96 and Bit = 2 То - Тр 0.3 Ti - To - > To - 30 = 0.3 2

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