A comparison of hot coffee and cold lake is, the heat from the coffee will be absorbed by the cold lake through convection method of heat transfer.
Heat is transferred through the convection, which is basically large-scale movement of molecules inside gases and the liquids. Conduction is basically used to move heat from one of the object to the fluid initially, but fluid motion is all responsible for the bulk of the heat transfer.
Conservation of energy
The principle of conservation of the energy states that the total energy of an isolated system is always in conserved state.
Heat lost by all the hot coffee = Heat absorbed by all the cold lake
Heat transfer process
Heat from the coffee will all be absorbed by the cold lake through convection method of the heat transfer.
Thus, the comparison of hot coffee and the cold lake is, the heat from the coffee will all be absorbed by the cold lake through convection method of the heat transfer.
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