HW01 Quy - perlick(app582 – HW01 – quy –(50970 1 This...

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Unformatted text preview: perlick (app582) – HW01 – quy – (50970) 1 This print-out should have 23 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points What is the correct order of increasing fre- quency? 1. radio waves, infrared radiation, ultravio- let radiation, visible light 2. ultraviolet radiation, visible light, in- frared radiation, radio waves 3. radio waves, visible light, ultraviolet radi- ation, infrared radiation 4. radio waves, infrared radiation, visible light, ultraviolet radiation correct 5. infrared radiation, radio waves, visible light, ultraviolet radiation Explanation: radio waves < infrared radiation < visible light < ultraviolet radiation 002 10.0 points Which of the following provided evidence that the electrons in atoms are arranged in distinct energy levels? 1. the existence of elements with noninteger values for atomic weights 2. the observation of line spectra from gas discharge tubes correct 3. the deflection of ions in a mass spectrom- eter 4. the scattering of α particles by a metal foil 5. the results of the Millikan oil-drop exper- iment Explanation: The fact that gases emitted only specific wavelengths of energy suggested that electron energy states are quantized. 003 10.0 points Consider a flea of mass 4 . 5 × 10 − 4 g moving at 1 . 0 m / s midway through its jump. What is its de Broglie wavelength? 1. 1 . 47244 × 10 − 27 m correct 2. 2 . 9818 × 10 − 37 m 3. 2 . 9818 × 10 − 40 m 4. 1 . 4725 × 10 − 30 m Explanation: m = 0 . 00045 g × . 001 kg 1 g = 4 . 5 × 10 − 7 kg λ = h p = h m · v = 6 . 626 × 10 − 34 kg · m 2 s (4 . 5 × 10 − 7 kg)(1 m / s) = 1 . 47244 × 10 − 27 m 004 10.0 points All of these are forms of electromagnetic radi- ation except 1. gamma rays. 2. microwaves. 3. plane-polarized light. 4. enantiomers. correct Explanation: 005 10.0 points Visible light, microwaves, and x-rays travel through empty space at 3.00 × 10 8 m · s − 1 . 1. True correct perlick (app582) – HW01 – quy – (50970) 2 2. False Explanation: All forms of electromagnetic radiation move at the same speed through empty space, at speed c = 3 × 10 8 m/s....
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This note was uploaded on 12/03/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Fall '07 term at University of Texas.

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HW01 Quy - perlick(app582 – HW01 – quy –(50970 1 This...

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