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Two parallel planes 1.2x1.2 are splited by a distance of 1.2 m. the emissivity's of the planes are 0.4 and 0.6, and the temperature are 760 and 300 oC, correspondingly. A 1.2x1.2 radiation shield having an emissivity of 0.05 on both side situated equidistance among the two planes. The combined arrangement is placed in a large room which is maintained at 40 oC. (a) Determine heat transfer rate from each of the two planes if the shield were not present. (b) Determine heat transfer rate from each of the two planes if the shield were present. (c) Temperature of the shield.
which are the different types of commercial cells?
Porosity: The property of the refractory brick is the ratio of its pore volume to the total volume. The refractory material with high porosity is not preferred for furnace lining
A gas-phase exothermic reaction is approved out in a multi-tube reactor with the catalyst in 1-inch. Tubes and boiling water in the jacket. The feed temperature and the jacket temp
The similar system is now heated in two stages, by rst contacting with a reservoir at T2 halfway among T1 and Tf , then by contacting with the reservoir at Tf . Again and the ent
Hard magnetic materials Permanent magnets are used as passive generators of magnetic field. To produce and maintain the magnetic field, a material should have both high resid
BLOW MOLDING
why ,a substance is being heated at a fast rate the temperature of decomposition will be the higher than the obtain at a slower heating rate..
how Be2+ isoelectronic with li+
A contaminated soil contains 100 mg metals/kg soil (all metals are readily condensable), 50,000 mg S/kg soil, 1,000 mg F/kg soil, 980 mg/Kg of VOCs and 40,000 mg Cl/kg soil and is
how to reduce COD in primary process effluent treatment system
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