(a) Calculate the transmission coefficient of an electron with a kinetic energy of 0.1 eV impinging on a potential barrier of height 1.0 eV and a width of 4 Å (b) Repeat part (a) for a barrier width of 12 Å. (c) Using the results of part (a), determine the density of electrons per second that impinge the barrier if the tunneling current density is 1.2 mA/cm2.

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