# quiz3A.pdf - Physics 2D Winter 2013 Quiz 3 Version A Closed...

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Physics 2D Winter 2013: Quiz 3 1 2/15/2013 Version A Closed book. No work needs to be shown for multiple-choice questions. You may use a calculator. 1) Calculate the de Broglie wavelength for an electron with kinetic energy 13.6 eV . a. 0.332 nm b. 91.2 nm c. 0.051 nm d. 441 nm e. none of the above 2) Find the kinetic energy required for α particles to resolve atomic features of size 0.10 nm. m α = 3.727 GeV/c 2 a. 7 MeV b. 10 eV c. 1 eV d. 0.02 eV e. none of the above 3) A particle of mass m is bound in a potential ! ! = ! ! ! ! ! . Use the uncertainty principle to estimate the potential energy of the particle in the ground state. a. ! ! ! b. ! ! ! ! c. ! ! ! ! d. ! ! ! ! ! ! ! e. none of the above 4) Robert Hofstadter won the 1961 Nobel prize in physics for measuring the scattering of 20 GeV electrons from nuclei. What is the wavelength of a 20 GeV electron? a. 0.0620 fm b. 0.620 fm c. 0.0000000620 fm d. 0.620 nm e. none of the above 5) A π 0 meson is an unstable particle produced in high energy particle collisions. It has a mass of 135 MeV/c 2 , and it exists for an average lifetime of only 8.7 X 10 -17

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