What is the source of the kinetic energy

Reference no: EM131352682

1. Why can the exchange interaction have a significant effect on a narrow band with a high density of states (as the 3d band in the transition elements) although the interaction energy is small?

2. A nail is placed at rest on a smooth table top near a strong magnet. It is released and attracted to the magnet. What is the source of the kinetic energy the nail has just before it strikes the magnet?

Reference no: EM131352682

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