5) A surface of area 0.8 m2, emissivity 0.75, and temperature 97°C is placed in a large evacuated chamber whose walls are maintained at 12°C. a) What is the rate at which radiation is emitted by the surface? b) What is the net rate at which radiation is exchanged between the surface and the chamber walls?

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Units and Dimensions

These are generally defined as the terms which precede or describes the dimensions further. These are also further divided into two parts namely fundamental units and the derived units.