How much heat will be held for 1 hour in S = 1 m ^ 2 surface of the ice thickness h = 25 cm, if the air temperature t1 = 20 ° C, while the water temperature at the surface of the ice t2 = 0 ° C? How many times the intensity of the heat transfer through the ice is higher than through the air, in the absence of heat transfer by convection and radiation?

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