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14. A particle in free space is initially in a wave packet described by 1/4 V(x) = (a) What is the probability that its momentum

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14. A particle in free space is initially in a wave packet described by 1/4 V(x) = (a) What is the probability that its momentum is in the range (p, p + dp)? (b) What is the expectation value of the energy? Can you give a rough argument based on the "size" of the wave function and the uncertainty principle, for why the answer should be roughly what it is

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