The quantum tunneling phenomenon

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The quantum tunneling phenomenon is negligible in the classical mechanics.

Show that the tunneling probability equals 0 for an object of mass 0.007 kg moving at a speed of 0.1 m/s against a solid obstacle of height 0.05 m and width 0.01 m.

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De Broglie wavelength of an electron

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What is the de Broglie wavelength of an electron that has been accelerated through a potential difference of 100 V?

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