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Suppose a beam of 5.10 eV protons strikes a potential energy barrier of height 6.00 eV...

Suppose a beam of 5.10 eV protons strikes a potential energy barrier of height 6.00 eV and thickness 0.840 nm, at a rate equivalent to a current of 860 A. (a) How many years would you have to wait (on average) for one proton to be transmitted through the barrier? (b) How long would you have to wait if the beam consisted of electrons rather than protons?

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