2. A vertical square plate, 30cm on a side, is maintained at 50degC and exposed to room air at 20degC. The surface emissivity is 0.8. Calculate the heat lost by both sides of the plate.

Elements Of Electromagnetics
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Heat transfer
2. A vertical square plate, 30cm on a side, is maintained at 50degC and
exposed to room air at 20degC. The surface emissivity is 0.8. Calculate
the heat lost by both sides of the plate.
3. If the square plate in #2 is the one heated in the given condition of #1,
solve the new TOTAL HEAT LOST (one side only) in Watts.
Transcribed Image Text:2. A vertical square plate, 30cm on a side, is maintained at 50degC and exposed to room air at 20degC. The surface emissivity is 0.8. Calculate the heat lost by both sides of the plate. 3. If the square plate in #2 is the one heated in the given condition of #1, solve the new TOTAL HEAT LOST (one side only) in Watts.
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