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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.
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A) A horizontal tube having a 1.25 cm outside diameter is submerged in a water 1 atm and 100 oC. Determine the heat flux for the surface temperature of (a) 540 o C, (b) 650 o C,
consider a system at 290k for which the enery of the nth state is En=n(0.01ev) using 1+a+a square+ a cube+...=1/(1-a), find the value of partition function.find the constant C in P
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A tank contains cold water at a temperature Tc = 20°C and volume Vc = 1 m3. You add a volume Vh = 1 m3 of water at temperature Th = 100°C at time t = 0. Energy is lost from the tan
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