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Difficulty: EasyThermodynamics and Heat

When one end of an iron rod is placed directly into a campfire, the opposite end eventually becomes too hot to hold safely. Through which process is heat energy primarily transferred along the length of the solid metal rod?

  1. A
    Convection
  2. ConductionAnswer
  3. C
    Radiation
  4. D
    Evaporation

Answer

Conduction
Conduction is the process by which thermal energy is transferred through stationary matter by microscopic particle collisions and free electron movement. In metals, this occurs rapidly because mobile electrons efficiently transfer kinetic energy from the heated end to the cooler end.

Step-by-Step Solution

1
Identify the physical medium and mode of energy movement
Thermal energy travels through a solid, stationary metal rod from the hotter end to the cooler end.
In solids, atoms are fixed in place, meaning energy must be passed along via vibrations and collisions rather than bulk fluid circulation.
2
Match the observed physical process with the correct heat transfer classification
Direct transfer of thermal kinetic energy between adjacent atoms and free electrons is defined as conduction.
Conduction specifically governs heat propagation through direct particle-to-particle interaction in solids.

Key Concept

Thermal conduction in solid materials
Estimated Time:40s
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Topics

Thermodynamics and Heat

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