Ex3-practice - Exam 3/ Phys 172 - Practice Exam K total = K...

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Exam 3/ Phys 172 - Practice Exam 2 2 2 2 2 1 (non-relativistic) 22 (non-relativistic) 1 1 ( ), quantum oscillat 2 total trans tot vib total total total cm total total total cm ii rot rot rot AA s N KKK K p KM v M pm v Im r LI L KI I Lrp rF k EN m ω τ =+ + == = = = GG G G = 2 or 13.6 , hydrogen atom N eV E N = 31 for head-on elastic collisions xx mM pp ± ⎡⎤ = ⎢⎥ + ⎣⎦ photon E light light hc h ν λ 11 1 NN cm N i i mr r M m = G 2 , 2 f tot trans net ext cm i P KF d r M ⎛⎞ Δ= Δ = ⎜⎟ ⎝⎠ G G i () 2 2 2 Ep cm c 12 3 for 2D inelastic collisions Mv mv v Mm + = + for rotating vector dX X X dt = G G , trans C Lr p N =× = G =
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1. Suppose a collection of quantum harmonic oscillators occupies the lowest 4 energy levels, and the spacing between levels is 0.03 eV. What is the complete emission spectrum for this system? That is, what photon energies will appear in the emissions? A. 0.03 eV B. 0.03, 0.06 eV C. 0.03, 0.06, 0.09 eV D. 0.03, 0.06, 0.09, 0.12 eV E. 0.015, 0.03, 0.06 eV 2. A hydrogen atom is in state N = 4, where N = 1 is the lowest energy state. What is K+U in electron volts for this atomic hydrogen energy state? A. 13.6 eV B. -13.6 eV C. 3.4 eV D. -3.4eV E. - 0.85eV 3. The atom from the previous problem makes a transition to state N = 1. What is K+U in electron volts for this atomic hydrogen energy state? A. 13.6 eV B. -13.6 eV C. 12.75 eV D. -3.4eV E. - 0.85eV 4. The atom from the previous problem makes a transition to state N = 1. What is the energy in electron volts of the photon emitted in the transition from level N = 4 to N = 1? A. 13.6 eV B. -13.6 eV C. 12.75 eV D. -3.4eV E. - 0.85eV
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5 . Initially a hydrogen atom is in its ground state . An electron with kinetic energy 10.6 eV collides with the atom and excites it. What is the remaining kinetic energy of the electron?
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This note was uploaded on 11/02/2009 for the course PHYS 172 taught by Professor ? during the Spring '08 term at Purdue University-West Lafayette.

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Ex3-practice - Exam 3/ Phys 172 - Practice Exam K total = K...

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