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Five electrons are in a two-dimensional square potential energy well with sides of length L. The potential energy is infinite at the sides and zero inside. The single-particle energies are given by (h2 /8mL2 )(n2x + n2y ), where nx and ny are integers. In units of (h2 /8mL2 ) the energy of the first excited state of the system is:

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Five electrons are in a two-dimensional square potential energy well with sides of length L. The potential energy is infinite at the sides and zero inside. The single-particle energies are given by (h2 /8mL2 )(n2x + n2y ), where nx and ny are integers. In units of (h2 /8mL2 ) the energy of the ground state of the system is:





 
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