chp25_29_practshts

# chp25_29_practshts - natural Frequency in the class 3 CHP...

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CHP. 25 Vibrations and Waves 1. F 2. F 3. T 4. F 5. F 6. C (I think) 7. A 8. C 9. D 10. C 11. B 12. A 13. B 14. 4 m/s 15. Use: speed = wavelength *frequency answer: 454 meters. 16. transverse waves: vibrations are perpendicular to direction of energy transfer. (example: light waves) longitudinal waves: vibrations are parallel to direction of energy transfer (example: sound waves) 1

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CHP. 26 Sound 1. F 2. F 3. T 4. T 5. T 6. B 7. D 8. D 9. D 10. B 11. not covered 12. D 13. not covered 14. take the speed of sound to be 340 m/s. Then distance to wall of canyon is 340 meters. (Remember, its a round trip for sound to travel from your mouth to the wall of the canyon and then back to your ears). 15. 100 violins because a rise of 10 dB means a tenfold (ten times) increase in loudness. 2
16. Resonance is the efect caused by applying a Force to an object at its natural Frequency and consists oF large am- plitudes oF vibration. We saw a pendulum driven at its

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Unformatted text preview: natural Frequency in the class. 3 CHP. 27 Light 1. F 2. T 3. not covered 4. not covered (but true) 5. T 6. A 7. A 8. C 9. A 10. A 11. C 12. not covered 13. not covered 14. not covered 15. C 16. not covered 4 CHP. 28 Color 1. not covered 2. F 3. not covered 4. F 5. T 6. not covered 7. C 8. D 9. not covered 10. C 11. A 12. not covered 13. D 14. C 15. not covered 16. With the sun overhead, the atoms in the atmosphere scatter mostly blue light. When the sun is down near the horizon (sunset), the sunlight travels a long way through the air to us. Most of the blue light is already scattered and what’s left to hit our eyes is red light. 5 CHP. 29 Reﬂection and Refraction 1. T 2. F 3. not covered 4. T 5. not covered 6. D 7. not covered 8. C 9. A 10. D 11. not covered 12. not covered 13. C 14. not covered 15. B 16. not covered 6...
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chp25_29_practshts - natural Frequency in the class 3 CHP...

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