The both sides of a sheet of paper, 0.l mm (or 104 m) thick, initially at 20.4c, are suddenly exposed to combustion products for which T. 412C and h= 68 w/m? K Determine the time of exposure in (secona) required for the surtace to reach the ignition temperature of 233c. the properties of the paper are as follows • density - 545 kg/m thermal conductivity = 0.17 w/mc • heat diffusivity = 131 x 107 m/s (The tolerance of your answer is 2%) Answer:

The both sides of a sheet of paper, 0.l mm (or 104 m) thick, initially at 20.4c, are suddenly exposed to combustion products for which T. 412C and h= 68 w/m? K Determine the time of exposure in (secona) required for the surtace to reach the ignition temperature of 233c. the properties of the paper are as follows • density - 545 kg/m thermal conductivity = 0.17 w/mc • heat diffusivity = 131 x 107 m/s (The tolerance of your answer is 2%) Answer:

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter9: Heat Transfer With Phase Change

Section: Chapter Questions

Problem 9.35P

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