When one end of a metal rod is heated, the kinetic energy of the molecules at that end increases. Thus the kinetic energy of the neighbouring molecules increases hence their amplitude of vibration increases and during the collision the energy transfers to the next molecule. Thus heat transfer takes place by conduction.
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Answer:
When one end of a metal rod is heated, the kinetic energy of the molecules at that end increases. Thus the kinetic energy of the neighbouring molecules increases hence their amplitude of vibration increases and during the collision the energy transfers to the next molecule. Thus heat transfer takes place by conduction.