Two similar kettles containing equal masses of boiling water are placed on a table. If the surface of one is highly polished and the surface of the other is covered with soot, Which of the following observations is correct
A. The two kettles will cool down at the same rate B. the polished kettle cools down more quickly by conduction C. the kettle covered with soot cools down more quickly because it is a good radiator D. the kettle covered with soot cools down more quickly by the process of heat convection
