Answer :
Final answer:
When boiling an egg, the majority of heat transfer occurs through conduction and convection. Conduction transfers heat from the pan to the water and then to the egg, while convection helps circulate the heated water. Although radiation is present, it plays a minimal role in this process.
Explanation:
Methods of Heat Transfer in Boiling an Egg
When boiling an egg in a pan of water, we observe several methods of heat transfer at work. The primary methods involved are conduction and convection.
1. Conduction
Conduction is the transfer of heat through direct contact. In this case, the heat from the stove heats the metal of the pan, which then directly heats the water in contact with it. As the temperature of the water increases, it also heats the egg through direct contact.
2. Convection
Convection involves the transfer of heat by the movement of fluids (liquids or gases). As the water at the bottom of the pan gets heated, it becomes less dense and rises, while cooler, denser water descends. This creates a flow that evenly distributes the heat throughout the water, effectively maintaining a uniform cooking temperature for the egg.
While radiation occurs to some extent (heat emanating from the stove), the majority of heat transfer in this scenario is through conduction and convection. Therefore, the correct answer to the question is conduction and convection.
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