Suppose that at time t = 0 an electron in a magnetic field in the +z direction has state . Let The expectation value as a function of time in this case is which of the below?

A.

B.

C. 0

D.

E.

F. Something else (specify)




D.

Physics & Space Science

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A magnifying glass has a convex lens of focal length 15 cm. At what distance from a postage stamp should you hold this lens to get a magnification of +2.0?

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A wire contains a steady current of 2 A. The charge that passes a cross section in 2 s is:

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If a spring-operated gun can shoot a pellet to a height of 100. m on Earth, how high could the pellet rise if fired on the moon?

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Supernovas are thought to always result in

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