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An ice sheet forms on a lake. The air above the sheet is – 15oC ,...

An ice sheet forms on a lake. The air above the sheet is – 15oC , Where as the water is at 0oC. Assume the heat of fusion of water freezing on the lower surface is conducted through the sheet to the air above. How Much time will it take to form a sheet of ice 25 cm thick ?.

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