practice final

# practice final - Practice Final Physics 6c extra problems 1...

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1) Suppose that an electron and a neutron have the same speed (assume they are both free particles, not inside an atom). Compared to the neutron, the electron has A) less momentum and a longer wavelength B) less momentum and a shorter wavelength C) more momentum and a longer wavelength D) more momentum and a shorter wavelength E) none of the above 2) Consider two particles. Particle 1 has uncertainty in position of x , and minimum uncertainty in momentum of p . If the uncertainty in the position of particle 2 is 2 x, the minimum uncertainty in its momentum is A) ¼ p B) ½ p C) p D) 2 p E) 4 p 3) Nucleus X has 100 times as many nucleons as nucleus Y. Compared to nucleus Y, nucleus X has A) a larger radius and a higher density B) a larger radius and a smaller density C) a larger radius and an equal density D) a smaller radius and a smaller density E) a smaller radius and a higher density 4) The number of radioactive nuclei in a particular sample decreases to one-eighth of its original number in 21 days. What is the half-life of these nuclei?

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practice final - Practice Final Physics 6c extra problems 1...

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