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Unformatted text preview: Weinelt, Karl – Homework 5 – Due: Oct 12 2003, midnight – Inst: Donna Lyon 1 This print-out should have 25 questions, check that it is complete. Multiple-choice questions may continue on the next column or page: find all choices before making your selection. The due time is Central time. This assignment is due Sunday, October 12, by midnight. 001 (part 1 of 1) 10 points Cathode rays are ? . These particles have the ? charge/mass ratio of the fundamen- tal particles found in the atom. 1. None of the other answers is correct 2. protons, smallest 3. electrons, largest 4. neutrons, largest 5. protons, largest 002 (part 1 of 1) 10 points When combined with Thomsoms determina- tion of the mass to charge ratio of the electron, Millikans experimental work allowed for the determination of the 1. charge on the electron. 2. All of the above. 3. speed of the electron. 4. mass of the electron. 003 (part 1 of 1) 10 points What experimental evidence led Thomson to conclude that cathode rays were negatively charged? 1. Cathode rays were deflected towards a negatively charged plate 2. Cathode rays pushed a paddle wheel counterclockwise 3. False; cathode rays are positively charged, not negatively charged 4. Cathode rays were deflected towards a positively charged plate 5. Cathode rays pushed a paddle wheel clockwise 004 (part 1 of 1) 10 points In the cathode ray tube experiment, it was found that a beam of cathode rays were able to turn a paddle wheel, thus proving that 1. electrons are negatively charged. 2. electrons have mass. 3. cathode rays are actually electrons. 4. all of the above. 5. protons are positively charged. 005 (part 1 of 1) 10 points A proton is about ? an electron. 1. 200 times heavier than 2. about the same mass as 3. 2000 times heavier than 4. 2000 times lighter than 006 (part 1 of 1) 10 points Rutherfords α-scattering experiment showed that most α particles directed toward a thin metallic foil passed through with only slight deviations.deviations....
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This note was uploaded on 04/30/2008 for the course CH 301 taught by Professor Fakhreddine/lyon during the Spring '07 term at University of Texas at Austin.
- Spring '07