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Engineering, 07.08.2019 17:20 angel41vgg

The heat tranfer rate due to free convection from a vertical surface, 1 m high and 0.6 m wide, to quiescent air that is 5 k colder than the sruface is known. what is the ratio of heat transfer rate for that situation to the rate corresponding to a vertical surface, 0.6 m high and 1 m wide, when the quiescent air is 5 k warmer than the surface? neglect the heat trasfer by radiation and any influence of temperature on the relevant thermophysical properties of air.

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