Heat transfer from hot water is placed inside closed metal vessel to surrounding - Heat Transfer

Q.  Suppose a hot water is placed inside a closed metal vessel of thickness 5 mm. There is atmospheric air outside the vessel at temperature lower than the temperature of hot water. The heat is transferred from the hot water to atmospheric air. What is the mode of heat transfer in this condition?
- Published on 11 Aug 15

a. conduction then convection
b. convection then conduction
c. convection then conduction then convection
d. conduction then convection then conduction

ANSWER: convection then conduction then convection

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