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# HW5 - Homework#5 Your Name Due on Friday November 4 before...

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Homework #5 Your Name: Due on Friday, November 4, before the lecture. Only one problem will be graded explicitly. The last problem is optional. Uncertainty Principle: 1) Position-momentum uncertainty principle: The velocity of a rifle bullet is about 900 m/s. If the bullet weights 30 g, and the uncertainty in its momentum if 0.10%, how accurately can the position of the bullet be measured? 2) Time-energy uncertainty principle: 3) Superposition Principle, and Stern-Gerlach experiments: This is the Stern-Gerlach experiments we discussed in lectures. a) Please change the second SG device from SG x to SG y and then predict the outcome (including probability) after the third SG device. Please clearly show your calculations. Note: SG z means Stern-Gerlach device measuring S Z . b) Please change the first SG device from SG z to SG y and then predict the outcome (including probability) after the third SG device. Please clearly show your calculations.

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