a). Show that the thickness of the ice sheet formed on the surface of a lake is proportional to the square root of the time if the heat of fusion of the water freezing on the underside of the ice sheet is conducted through the sheet.(adsbygoogle = window.adsbygoogle || []).push({});

b). Assuming that the upper surface of the ice sheet is at -10 degree celsius and that the bottom surface is at 0 degree celcius, calculate the time it will take to form an ice sheet 25 cm thick.

c). If the lake in part (b) is uniformly 40m deep, how long would it take to freeze all the water in the lake?

I have the difficulty on part a that how to work out the relationship.

thx for attention

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# Homework Help: Time needed for a lake to freeze over.

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