Ch. 14 Waves (General) Review ANSWERS. COMPLETION 1. Frequency 2. Standing waves 3. Refraction 4. Compression 5. Medium 6. Interference 7. Compressional.

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Presentation transcript:

Ch. 14 Waves (General) Review ANSWERS

COMPLETION 1. Frequency 2. Standing waves 3. Refraction 4. Compression 5. Medium 6. Interference 7. Compressional wave (longitudinal) 8. Transverse 9. Remains the same 10. node 11. Ultraviolet waves 12. Gamma rays 13. Electromagnetic waves 14. Radio waves 15. Infrared waves 16. Visible light 17. X rays 18. Ultraviolet 19. Radio 20. Energy

COMPLETION continued 21. Higher 22. Electromagnetic waves 23. wavelength

SHORT ANSWER 24. A sound wave is a mechanical wave and needs a medium (air) to travel. There is no air in a vacuum. 25. The crust breaking creates vibrations that carry out energy in the form of waves. 26. B,A,C 27. Amplitude is determined by the area that is squeezed together. 28. At the node (trough), destructive interference takes place and at the crest (antinode), constructive interference takes place.

SHORT ANSWER continued 29. The wavelength decreases (shortens) but, the amplitude and speed stay the same. 30. They both generate changing fields. 31. Microwaves vibrate the water molecules in the cake batter, creating thermal energy to bake the cake. There are no water molecules in the baking dish.

SHORT ANSWERS continued 32. UVA and UVB are two types of ultraviolet waves. UVA has a longer wavelength and causes wrinkles and tanning. UVB has a shorter wavelength and causes sunburn. Too much UVB can cause cancer. 33. When you set your radio to a particular frequency, your radio receives that frequency and whatever is happening on that frequency (music, sports, talk radio, Oprah, truck drivers, etc)

PROBLEMS 34. Given: 4.4 m, 2.0 s Formula: V = d/t Solution: 4.4 m/2.0 s = 2.2 m/s 35.Given: 2.0 Hz, 10 mFormula: =  f Solution: 2.0 Hz x 10 m = 20 m/s