1. A flat plate, maintained at 250 C is placed vertically in
air at a pressure of 1 bar and temperature of 20 C. The plate height and width
are 20 cm and 10 cm. Find the rate of heat transfer to this plate.
2. Consider two identical flat plates both maintained at 400
K. These plates are placed vertically into tow large containers. One plate is
placed in a container full of air at 300 K and 1 atm and the other plate in a
container full of carbon dioxide at 300 K and 1 atm. Find the ratio of the
Grashof numbers Grair/GrCO2.
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