> Say I have hot coffee and lukewarm coffee. The lukewarm coffee will equilibrate faster. It won't (all else being equal). :) Because of Newton's law of cooli

> Say I have hot coffee and lukewarm coffee. The lukewarm coffee will equilibrate faster. It won't (all else being equal). :) Because of Newton's law of cooling, hot coffee will cool down faster (precisely, the rate of change of temperature of a solid body is proportional to the difference in temperature between the body and the environment).