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Oranges are very susceptible to cold weather, and long exposure to subfreezing temperatures can destroy them. Consider an 8 cm diameter orange (assume it is an idealised sphere) that is initially at 15oC. A cold front moves in one night, and the ambient temperature suddenly drops to -8.5oC, with a heat transfer coefficient of 7 W m-2 K−1 . Using the properties of water for the orange and assuming the ambient conditions to remain constant for 2.5 hours before the cold front moves out, determine temperatures at: ro = 0.0 cm (i.e., centre of the orange); ro = 1.0 cm; ro = 2.0 cm; ro = 3.0 cm; ro = 4.0 cm




using given data and heisler charts we can find the required variables
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