Question

In a 10 m deep lake, the bottom is at a constant temperature of `4^(@)C`. The air temperature is constant at `- 4^(@)C. K_(ice) = 3 K_(omega)`. Neglecting the expansion of water on freezing, the maximum thickness of ice will be
A. 7.5 m
B. 6 m
C. 6 m
D. 2.5 m

Answer 1

a) KA`(4-0)/(10-x) = 3KA(0-(-4))/x`

`rArr x=7.5m`