Two similar kettles containing equal masses of boiling water are placed on a table. If...
PHYSICS
JAMB 1994
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
Correct Answer: C. the kettle covered with soot cools down more quickly because it is a good radiator
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